BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CLEVER Planets - ECPv6.15.3//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-ORIGINAL-URL:https://cleverplanets.org X-WR-CALDESC:Events for CLEVER Planets REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20190310T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20191103T070000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20200308T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20201101T070000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20210314T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20211107T070000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20220313T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20221106T070000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=America/Chicago:20220419T120000 DTEND;TZID=America/Chicago:20220419T130000 DTSTAMP:20260423T142602 CREATED:20220131T154015Z LAST-MODIFIED:20220414T154938Z UID:2560-1650369600-1650373200@cleverplanets.org SUMMARY:Seminar - Oliver Shorttle DESCRIPTION:Speaker: Oliver Shorttle\, Department of Earth Sciences\, University of Cambridge \nTitle: Rocky planet atmospheres in the solar system and beyond \nAbstract:\n\nPlanetary atmospheres potentially record a plethora of processes dating from accretion\, early bombardment\, and subsequent volcanic growth.  Whether for solar system planets or exoplanets\, the present-day composition of atmospheres may therefore be a rich archive of information on their geological history.  In the case of warm rocky planets\, those without liquid water at their surface\, recycling of the volatile elements constituting the atmosphere into the planet’s interior may be or inefficient or entirely inhibited.  In this case\, the atmospheres of warm rocky planets may constrain the interior composition and dynamics of the planet\, offering exciting potential to understand exoplanet interiors. \nIn this talk I present our recent results investigating the role of early massive impacts and volcanic degassing in building planetary atmospheres on rocky planets.  These results show the prospects and limitations of having to view planetary processes through the lens of their atmospheres.  I also discuss how Venus provides a key solar system analogue to warm rocky exoplanets\, the chemistry of which provides a reference case for predictions of atmospheric chemistry on Venus-like exoplanets. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/seminar-oliver-shorttle/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20220405T120000 DTEND;TZID=America/Chicago:20220405T130000 DTSTAMP:20260423T142602 CREATED:20220131T153820Z LAST-MODIFIED:20220329T211733Z UID:2558-1649160000-1649163600@cleverplanets.org SUMMARY:Seminar - Christoph Burkhardt DESCRIPTION:Speaker: Christoph Burkhardt\, Institut für Planetologie\, Westfälische Wilhelms-Universität Münster \nTitle: Mode of terrestrial planet formation and heritage of Earth’s volatiles: the story from isotope anomalies in meteorites \nAbstract: As tracers of planetary genetics\, isotope anomalies among planetary materials can provide key constraints for unraveling the Solar System’s dynamical evolution\, from the collapse of the molecular cloud to the formation of the terrestrial planets. In this lecture I will show how isotope anomalies among meteorites can be used to constrain the origin of Earth’s and Mars’ building blocks\, and whether pebble accretion or the classic oligarchic growth regime dominated the accretion of the terrestrial planets in the solar system. Further\, I will briefly discuss why it is relevant to know what the Earth is made of in the first place\, and end with some reflections on what isotope anomalies tell us – and what they don’t tell us – about the origin of Earth’s volatiles. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/seminar-christoph-burkhardt/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20220322T120000 DTEND;TZID=America/Chicago:20220322T130000 DTSTAMP:20260423T142602 CREATED:20220131T153408Z LAST-MODIFIED:20220317T182445Z UID:2556-1647950400-1647954000@cleverplanets.org SUMMARY:Seminar - Fabrice Gaillard DESCRIPTION:Speaker: Fabrice Gaillard\, CNRS\, Orleans \nTitle: Atmophile elements in magma oceans \nAbstract: The process ruling the fate light volatile elements (life-forming elements\, C-H-O-S-N) during the magma ocean stage are important to define since numerous geochemical observations indicate that these were delivered early on planetry systems. Here\, combining experimental data and thermodynamic modelling\, I will expose two axis of our research on 1- the outgassing of the magma ocean atmosphere and 2- the sequestration of some of these elements in the core. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/seminar-fabrice-gaillard/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20220307 DTEND;VALUE=DATE:20220312 DTSTAMP:20260423T142602 CREATED:20210831T214637Z LAST-MODIFIED:20210831T214637Z UID:2334-1646611200-1647043199@cleverplanets.org SUMMARY:LPSC 2022 DESCRIPTION: URL:https://cleverplanets.org/event/lpsc-2022/ CATEGORIES:Conference END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20220222T120000 DTEND;TZID=America/Chicago:20220222T130000 DTSTAMP:20260423T142602 CREATED:20220131T153034Z LAST-MODIFIED:20220216T185936Z UID:2554-1645531200-1645534800@cleverplanets.org SUMMARY:Seminar - Karin Öberg DESCRIPTION:Speaker: Karin Öberg\, Department of Astronomy\, Harvard University \nTitle: The Chemistry of Planet Formation \nAbstract: Planets form in disks of dust and gas around young stars. The compositions of planets\, including the hospitality to life\, is fundamentally set by the composition of this dust and gas across the planet-forming disk. Recently we undertook a large ALMA project to map out the chemical content of five such disks at scales of 10s to 100s of au. We find a rich and highly unevenly distributed chemistry\, manifest in 100s of molecular sub-structures including rings and gaps. I will present some of these images as well as discuss how the distribution of organics in disks\, especially the prebiotically interesting nitriles\, and oxygen depletion should inform models of planet formation and mature planet compositions. This observational lens will be supplemented by recent theory and experiments that help make sense of our increasingly detailed astrochemical observations\, as well as some thoughts on how JWST will provide further constraints on the chemistry of planet formation. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/seminar-karin-oberg/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20220208T120000 DTEND;TZID=America/Chicago:20220208T130000 DTSTAMP:20260423T142602 CREATED:20220131T152749Z LAST-MODIFIED:20220201T200751Z UID:2551-1644321600-1644325200@cleverplanets.org SUMMARY:Seminar - Jacob Kegerreis DESCRIPTION:Speaker: Jacob Kegerreis\, Institute for Computational Cosmology\, Durham University \nTitle: Atmospheric Erosion (and more!) by Giant Impacts onto Terrestrial Planets \nAbstract: Giant impacts dominate many planets’ late accretion and evolution\, including the Earth’s\, and can build\, erode\, or completely destroy a young atmosphere. In this talk\, I’ll present how we use 3D simulations to examine the erosion and other consequences of these collisions. For example\, in the Moon-forming impact\, only around 10% of the atmosphere would have been lost from the immediate effects of a ‘canonical’ impact\, up to about 60% in more violent scenarios. We find a scaling law to predict the loss of atmosphere from planetary collisions for any speed\, angle\, impactor mass\, target mass\, and body compositions\, in the regime of broadly terrestrial planets with relatively thin atmospheres. Different collision scenarios lead to extremely different behaviours and consequences for the planets. In spite of this complexity\, the fraction of lost atmosphere is fitted well by a power law\, and is independent of the total system mass for a constant impactor:total mass ratio. Slow impactors can also deliver a significant mass of atmosphere\, but always accompanied by larger proportions of their mantle and core. Lastly\, I’ll show how these high-resolution simulations reveal an alternate route for the origin of the Moon as an immediate post-impact satellite in orbit. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/seminar-jacob-kegerreis/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20211213 DTEND;VALUE=DATE:20211218 DTSTAMP:20260423T142602 CREATED:20210831T214542Z LAST-MODIFIED:20210831T214744Z UID:2332-1639353600-1639785599@cleverplanets.org SUMMARY:AGU 2021 DESCRIPTION: URL:https://cleverplanets.org/event/agu-2021/ CATEGORIES:Conference END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20211130T120000 DTEND;TZID=America/Chicago:20211130T130000 DTSTAMP:20260423T142602 CREATED:20210905T202121Z LAST-MODIFIED:20211129T221817Z UID:2348-1638273600-1638277200@cleverplanets.org SUMMARY:Seminar: Megan Newcombe DESCRIPTION:Speaker: MEGAN NEWCOMBE\, UNIVERSITY OF MARYLAND \nTitle: Efficient Degassing of Planetesimals During Melting and Differentiation: Water Delivery to Earth via Unmelted Material \nAbstract:The origin of water in the terrestrial planets is a topic of debate. Inner solar system bodies (e.g.\, Angrites\, 4-Vesta\, and the Moon) have D/H and volatile element ratios consistent with delivery of water by chondritic material\, but uncertainties persist regarding the timing of that delivery\, the ability of planetesimals to retain volatiles during accretion and differentiation\, and the role of alternative volatile sources such as nebular ingassing and comets. We have measured water in nominally anhydrous minerals in ungrouped achondrite and primitive achondrite meteorites with both carbonaceous (CC) and non-carbonaceous (NC) affinities. These analyses allow us to constrain the behavior of volatiles during the earliest stages of planetary accretion and melting. We expected that CC achondrite parent bodies would be more water-rich than their NC counterparts\, due to the fact that the CC bodies likely accreted in the ice-rich outer solar system. However\, our results show that nominally anhydrous minerals (olivine\, orthopyroxene\, clinopyroxene and plagioclase) in both CC and NC ungrouped achondrites contain ≤2 ppm H2O. Several processes could account for the dry nature of the CC and NC achondrites studied thus far\, including: (1) metamorphism of shallow unmelted chondritic material during internal heating\, driven by decay of short-lived radionuclides; (2) magma ocean degassing; and (3) melting and degassing of near-surface material during impact events. Since the undifferentiated meteorites among our samples are as dry as the samples that have undergone differentiation\, our results suggest that water is efficiently lost prior to differentiation\, during the early stages of melting and metamorphism\, such that water delivery to Earth likely occurred via unmelted material. \nZoom Meeting Details:  \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:https://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n Link provided in the registration confirmation emailPassword: CLEVER URL:https://cleverplanets.org/event/seminar-megan-newcombe/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20211116T120000 DTEND;TZID=America/Chicago:20211116T130000 DTSTAMP:20260423T142602 CREATED:20210905T153858Z LAST-MODIFIED:20210905T153858Z UID:2346-1637064000-1637067600@cleverplanets.org SUMMARY:Seminar - Caroline Dorn DESCRIPTION:Speaker: CAROLINE DORN\, ETH ZURICH \nTitle: Hidden water in magma oceans \nAbstract:\nOver the past years\, there has been huge progress in our understanding of the bulk properties of sub-Neptune exoplanets. Because hot and close-in planets are abundant in the exoplanet population\, phase transitions in the interiors of small\, dominantly rocky planets have come into sharper focus. Here\, we use coupled structural models of the interior and atmosphere of up to super-Earth-sized exoplanets to explore the effect of water partitioning into the interiors of rocky planets inside the runaway greenhouse transition and calculate the effect on the total radius of planets compared to recent models that ignore this effect. The two end-member assumptions lead to a deviation in total planet radius on the order of 5-10%\, which is within current accuracy limits for individual systems and will be statistically testable with next-generation transit surveys. In consequence\, the inferred water content for a given observed radius of a specific planet may be underestimated by up to two orders of magnitude if volatile partitioning between planetary sub-reservoirs is not accounted for. \n\n\nZoom Meeting Details: \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/seminar-caroline-dorn/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20211102T120000 DTEND;TZID=America/Chicago:20211102T130000 DTSTAMP:20260423T142602 CREATED:20210905T153527Z LAST-MODIFIED:20210905T153527Z UID:2344-1635854400-1635858000@cleverplanets.org SUMMARY:Seminar - Renyu Hu DESCRIPTION:Speaker: RENYU HU\, JET PROPULSION LABORATORY (JPL) \nTitle: Characterizing atmospheric chemistry in temperate exoplanets \nAbstract:\nThe era of observationally characterizing temperate exoplanets and studying their atmospheric composition has begun. Hubble and JWST already have several candidate planets to study\, and TESS may find another handful of temperate planets suitable for follow-up atmospheric observations. These temperate worlds are however very different from Earth – orbiting around a much cooler star\, being substantially larger\, or having different kinds of atmospheres. To guide observations\, I couple atmospheric chemistry models with basic understandings of planetary climate and interior processes to determine the ranges of detectable atmospheric signatures and their implications. Recent progress will be discussed in this talk. I will show that on habitable-zone planets around late M dwarf stars like TRAPPIST-1\, a small abundance of CO2 (often required to create a liquid-water ocean surface) would lead to a large abundance of O2 and CO in photochemical equilibrium. Because of this “O2-CO runaway”\, habitable environments around late M stars likely entail an O2-rich atmosphere. I will also show that on larger and H-rich temperate planets (such as K2-18 b)\, photochemical processes based on CH4 and NH3 produce detectable abundances of HCN but little hydrocarbons in the observable part of the atmosphere. Lastly\, I will discuss how future direct imaging observations using a starshade will enable the studies of temperate planets and their atmospheres around nearby stars. \n\n\nZoom Meeting Details: \n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/seminar-renyu-hu/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20211019T120000 DTEND;TZID=America/Chicago:20211019T130000 DTSTAMP:20260423T142602 CREATED:20210905T202515Z LAST-MODIFIED:20211012T145141Z UID:2350-1634644800-1634648400@cleverplanets.org SUMMARY:Seminar - Laurette Piani DESCRIPTION:Speaker: LAURETTE PIANI\, CRPG Nancy \nTitle: Distribution of water in the inner Solar System and interest for the origin of water on Earth \nAbstract:Hydrogen is the most abundant element of the Solar System; nonetheless its distribution and evolution in the protoplanetary disk and planetary materials remain fairly unknown. As a striking example\, the origin of Earth’s hydrogen -and thus water- is one of the most puzzling issues. Chondrites are rocky fragments of asteroids that formed at different times and heliocentric distances in the protoplanetary disk. By studying hydrogen in chondrites from different classes and groups\, we can have a window on the water distribution at the time of the planet formation. In this talk\, I will present recent works on hydrogen in chondrites that allow us to discuss the origin of the hydrogen isotopic distribution in the Solar System and implications for the Earth’s water budget. \n\nZoom Meeting Details: \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER\n\n  URL:https://cleverplanets.org/event/seminar-laurette-piani/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20211005T120000 DTEND;TZID=America/Chicago:20211005T130000 DTSTAMP:20260423T142602 CREATED:20210916T184950Z LAST-MODIFIED:20210928T044212Z UID:2353-1633435200-1633438800@cleverplanets.org SUMMARY:Seminar – Jennifer Bergner DESCRIPTION:Speaker: JENNIFER BERGNER\, UNIVERSITY OF CHICAGO \nTitle: Volatile chemistry in planet-forming disks \nAbstract:The viability of prebiotic chemistry on a nascent planet is dependent on the inventory of volatiles incorporated during the planet’s formation\, particularly carriers of the elements CHNOPS. This raises the questions: how did Earth obtain its prebiotic precursors\, and how commonly do other planets inherit the ingredients for prebiotic chemistry?  By studying the volatile chemistry at play in the evolutionary progenitors of planetary systems (protostars and protoplanetary disks)\, we gain valuable insight into these questions.  In this talk I will share recent progress in characterizing the chemistry of volatile species in planet-forming disks using ALMA\, which reveals how the changing physical environment alters the chemistry over the disk lifetime.  Our complementary simulations and lab experiments of astrophysical ices also allow us to probe the chemistry of the ice phase\, which is currently unobservable but represents the dominant volatile reservoir in disks.  Taken together\, we are assembling a more complete picture of the chemical environment which regulates the formation\, composition\, and potential habitability of planetesimals and planets. \n\nZoom Meeting Details: \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/seminar-jennifer-bergner/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20210921T120000 DTEND;TZID=America/Chicago:20210921T130000 DTSTAMP:20260423T142602 CREATED:20210831T214033Z LAST-MODIFIED:20210905T152928Z UID:2330-1632225600-1632229200@cleverplanets.org SUMMARY:Seminar - Anders Johansen DESCRIPTION:Speaker: ANDERS JOHANSEN\, UNIVERSITY OF COPENHAGEN \nTitle: Formation of terrestrial planets by pebble accretion \nAbstract: \nThe formation of the terrestrial planets in the Solar System is normally considered to last several 10s of million years and to have proceeded by giant impacts within a population of Mars-sized protoplanets. Observations of protoplanetary discs around young stars reveal that such discs host several hundred Earth masses of mm-cm sized pebbles. This inspired the pebble accretion theory for planet formation where the cores of giant planets grow by rapid accretion of these pebbles. By extension\, pebble accretion should be an important process in terrestrial planet formation as well. I present a series of new papers where we show that Venus\, Earth and Mars likely formed within 3-5 Myr by rapid pebble accretion. Volatiles such as water\, nitrogen and carbon are delivered by small pebbles that are accreted at the earliest stages of planetary growth. Partition of these volatiles between core\, mantle and atmosphere combined with early atmospheric loss gives good matches to the modern atmospheres and water reservoirs of Venus\, Earth and Mars. Pebble accretion thus gives a quantitive prediction of volatile budgets and atmospheric compositions of terrestrial planets without invoking stochastic giant impacts as the delivery source.\n\n\n\nZoom Meeting Details: \n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/clever-planets-seminar-series-2/ CATEGORIES:Lecture/Webinar END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20210907T120000 DTEND;TZID=America/Chicago:20210907T130000 DTSTAMP:20260423T142602 CREATED:20210831T213052Z LAST-MODIFIED:20210905T152949Z UID:2327-1631016000-1631019600@cleverplanets.org SUMMARY:Seminar - Max Collinet DESCRIPTION:Speaker: MAX COLLINET\, GERMAN AEROSPACE CENTER (DLR)\, BERLIN \nTitle: Achondrites as witnesses of early melting processes in planetesimals and planetary embryos: experimental constraints and new meteorite discoveries \nAbstract:\nAchondrite meteorites are highly variable in composition: some are ultramafic (primitive achondrites) while others are basaltic (e.g. eucrites and angrites)\, to trachy-andesitic (e.g. GRA 06128 and Erg Chech 002). Those different groups correspond to the mantle and crust of planetary building blocks\, respectively. They represent a unique opportunity to constrain the early melting processes that affected planetesimals and could have influenced the final composition of planets. \nI will describe two sets of low pressure (20-120 bars) melting experiments on chondritic compositions\, simulating batch and fractional melting (0-30 wt.% melting). They are the first experiments in which the alkali elements were retained successfully during melting at low pressure. By comparing the experimental results with the meteorite record\, I will argue that the melting processes\, and the efficiency of melt extraction\, varied greatly in achondrite parent bodies but that all planetesimals from the inner solar system (i.e. the non-carbonaceous reservoir) were initial rich in alkalis and other moderately volatile elements. The efficient extraction of silicate melts from the ureilite parent body suggest that highly volatile elements were also present during partial melting. \n\n\nZoom Meeting Details: \n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER URL:https://cleverplanets.org/event/clever-planets-seminar-series/ CATEGORIES:Lecture/Webinar END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20210704 DTEND;VALUE=DATE:20210710 DTSTAMP:20260423T142602 CREATED:20210115T192911Z LAST-MODIFIED:20210115T192911Z UID:2229-1625356800-1625875199@cleverplanets.org SUMMARY:Goldschmidt 2021 DESCRIPTION: URL:https://cleverplanets.org/event/goldschmidt-2021/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20210315 DTEND;VALUE=DATE:20210320 DTSTAMP:20260423T142602 CREATED:20210115T192640Z LAST-MODIFIED:20210115T192640Z UID:2227-1615766400-1616198399@cleverplanets.org SUMMARY:LPSC 2021 DESCRIPTION: URL:https://cleverplanets.org/event/lpsc-2021/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20210222 DTEND;VALUE=DATE:20210227 DTSTAMP:20260423T142602 CREATED:20210115T192438Z LAST-MODIFIED:20210115T192438Z UID:2225-1613952000-1614383999@cleverplanets.org SUMMARY:Habitable Worlds 2021 Workshop DESCRIPTION: URL:https://cleverplanets.org/event/habitable-worlds-2021-workshop/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20201207 DTEND;VALUE=DATE:20201212 DTSTAMP:20260423T142602 CREATED:20200508T192641Z LAST-MODIFIED:20200508T192641Z UID:2176-1607299200-1607731199@cleverplanets.org SUMMARY:AGU 2020 DESCRIPTION:San Francisco URL:https://cleverplanets.org/event/agu-2020/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200621 DTEND;VALUE=DATE:20200627 DTSTAMP:20260423T142602 CREATED:20200513T221538Z LAST-MODIFIED:20200513T221742Z UID:2193-1592697600-1593215999@cleverplanets.org SUMMARY:Goldschmidt 'Virtual' Conference 2020 DESCRIPTION:San Francisco URL:https://cleverplanets.org/event/goldschmidt-virtual-conference/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200531 DTEND;VALUE=DATE:20200605 DTSTAMP:20260423T142602 CREATED:20200204T171644Z LAST-MODIFIED:20200204T171644Z UID:2147-1590883200-1591315199@cleverplanets.org SUMMARY:American Astronomical Society meeting DESCRIPTION:Madison\, Wisconsin URL:https://cleverplanets.org/event/american-astronomical-society-meeting/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200316 DTEND;VALUE=DATE:20200321 DTSTAMP:20260423T142602 CREATED:20200204T171053Z LAST-MODIFIED:20200204T171245Z UID:2144-1584316800-1584748799@cleverplanets.org SUMMARY:Lunar and Planetary Science Conference DESCRIPTION:Held in The Woodlands\, Texas URL:https://cleverplanets.org/event/lunar-and-planetary-science-conference/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200119 DTEND;VALUE=DATE:20200125 DTSTAMP:20260423T142602 CREATED:20190208T155029Z LAST-MODIFIED:20190208T155029Z UID:1644-1579392000-1579910399@cleverplanets.org SUMMARY:2020 Gordon Research Conference - Origins of Life DESCRIPTION:Information available – April 1\, 2019 \nApplication deadline – December 22\, 2019 URL:https://cleverplanets.org/event/2020-gordon-origins-life/ CATEGORIES:Conference ATTACH;FMTTYPE=image/png:https://cleverplanets.org/wp-content/uploads/2019/02/grc_logo.png END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20191213T112000 DTEND;TZID=America/Chicago:20191213T233500 DTSTAMP:20260423T142602 CREATED:20191209T131816Z LAST-MODIFIED:20191209T131835Z UID:2124-1576236000-1576280100@cleverplanets.org SUMMARY:Talk by Megan Duncan at AGU 2019 DESCRIPTION:San Francisco. \n“Variations in Moderately Volatile Elements in Planetary Bodies from Impact Vaporization” \nAbstract: \nPlanet-building processes have a strong effect on the distribution of the elements in the resulting bodies. In particular\, moderately volatile elements (MVEs) have distinct differences in depletion between the meteorite groups and the planets. Understanding the chemical effects of impacts and post-impact processes are necessary in order to place constraints on the bulk composition of the planet (pre-differentiation). Vaporizing collisions\, common in energetic periods of accretion such giant planet migration and the terrestrial giant impact stage\, can separate refractory and volatile components as the system re-equilibrates during vapor plume expansion and cooling. In order to understand the chemical changes caused by high velocity collisions\, we must know the liquid-vapor phase boundary of the dominant mineral(s) of the original bodies\, likely a silicate mineral such as olivine or pyroxene. To constrain the equations of state of these minerals\, we conducted shock-and-release experiments with the Sandia Z machine on single crystal forsterite\, olivine\, and bronzite to determine the pressure (P)\, temperature (T)\, entropy\, and density of the shocked and post-shocked states. \nUpon decompression from the shocked state\, the high pressure fluid intersects the phase boundary and separates into a two-phase mixture at high P and T (e.g.\, ~1–1000 bar and ~4000–6500 K)\, driving melt-vapor partitioning under near-equilibrium conditions with limited isotopic fractionation. As the system continues to cool\, the MVE concentrations evolve until the system reaches the triple point and the melt freezes. The remaining condensable vapor adsorbs onto the larger solid droplets or condenses as new dust. Thus\, the MVE concentrations in the post-impact system may have large variations that are correlated with particle size. We explore the hypothesis that impact vaporization leads to a net enrichment of MVEs in dust-sized particles. Nebular size-sorting processes may separate the larger\, MVE-poor solids and the MVE-rich dust\, creating zones of variable depletion. During accretion\, the MVE-enriched dust may be variably incorporated into planetesimals and contribute to the chemical diversity observed in meteorites and planets. \nSNL is managed by NTESS under DOE-NSSA contract DE-NA0003525. URL:https://cleverplanets.org/event/talk-by-megan-duncan-at-agu-2019/ CATEGORIES:Conference END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20191212T134000 DTEND;TZID=America/Chicago:20191212T180000 DTSTAMP:20260423T142602 CREATED:20191209T131315Z LAST-MODIFIED:20191209T131315Z UID:2120-1576158000-1576173600@cleverplanets.org SUMMARY:Poster by Daman Grewal at AGU 2019 DESCRIPTION:San Francisco. \n“The core-mantle partitioning of carbon and nitrogen in carbon-undersaturated ultramafic systems” \nAbstract: \nIn addition to their highly volatile character\, segregation into the metallic core could have played an important role in explaining the depletion of carbon (C) and nitrogen (N) in the bulk silicate reservoirs of rocky bodies [e.g.\, 1\,2]. As the core-mantle partitioning character of C and N strongly depends on fO2\, they can act as a powerful tracers to understand the fO2-dependent volatile accretion history of terrestrial bodies. Previous high P-T experimental studies have shown that the highly siderophile character of C increases with decrease in fO2\, but can get suppressed in systems with high fH2\, while N acts as a siderophile element at >IW–2.5 and is lithophile at 4 GPa) remain stable in equilibrium with an H2O-rich fluid. Above the solidus (between 800-850 °C from 3-7 GPa)\, carbonates remain stable along with silicate minerals (cpx\, olivine\, garnet) and a CO2-rich melt phase over a restricted temperature interval until carbonates are completely melted out at T > 1000 °C at 3-5 GPa and > 1100 °C at 7 GPa. \nDue to the breakdown of chlorite at conditions above 3 GPa and 800 °C our experiments suggest that ophicarbonates will be nearly completely dehydrated at subarc depths\, delivering H2O to arc magma source regions. The stability of carbonates in our experiments suggest that even for the hottest subduction zones\, ophicarbonates in the mantle lithosphere (below slab MOHO) can retain C in the form of crystalline carbonates past subarc depths and deliver C deeper into the mantle. If ophicarbonates formed in the mantle wedge become mechanically coupled with the subducting slab\, then C can be completely released in the hottest subduction zones in the form of CO2-rich melts\, while ophicarbonates in cooler subduction zones may retain some C. In agreement with previous modeling studies3\, the present experimental study suggests that ophicarbonates dehydrate and deliver H2O to arc magma source regions and retain some amount of C in all but the hottest subduction zones\, highlighting the importance of these lithologies in delivering C past subarc depths deep into the mantle. \n1Alt\, J. C. et al. Lithos (2013) \n2Sieber\, M. J. et al. EPSL (201) \n3Kerrick\, D. M.\, & Connolly\, J. A. D. Geology (1998) URL:https://cleverplanets.org/event/talk-by-james-eguchi-at-agu-fall-meeting/ CATEGORIES:Conference END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20191209T114500 DTEND;TZID=America/Chicago:20191209T235000 DTSTAMP:20260423T142602 CREATED:20191209T130358Z LAST-MODIFIED:20191209T130358Z UID:2115-1575891900-1575935400@cleverplanets.org SUMMARY:Talk by Rajdeep Dasgupta at AGU Fall Meeting DESCRIPTION:In San Francisco. \nAbstract: \nLife-essential volatile elements such as carbon (C)\, hydrogen (H)\, and nitrogen (N) are all quite depleted in the inner Solar System rocky bodies such as Earth. Yet these ingredients are sufficiently abundant on the Earth’s surface that life could be sustained for billions of years in our planet. Is there anything unique about of Earth’s formation and early differentiation that led to acquisition of the life-essential volatile elements? The budgets of these major volatile elements are poorly known for other rocky planets; however\, do we expect the absolute and relative abundances of these ingredients for life to be similar across all Solar System planets? Here we will discuss some of the processes of planet formation and differentiation such as core formation\, magma ocean-atmosphere interaction that can fractionate the life-essential volatiles differently depending on the styles and timescales of planetary accretion and differentiation. We will emphasize how understanding the formation of habitable worlds would require bringing together constraints from many disciplines such as observational astronomy\, astrophysics\, geo- and cosmochemistry\, Earth history\, and geophysics. URL:https://cleverplanets.org/event/talk-by-rajdeep-dasgupta-at-agu-fall-meeting/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20191209T082500 DTEND;TZID=America/Chicago:20191209T083000 DTSTAMP:20260423T142602 CREATED:20191209T131559Z LAST-MODIFIED:20191209T132313Z UID:2122-1575879900-1575880200@cleverplanets.org SUMMARY:Talk by Sarah Stewart at AGU 2019 DESCRIPTION:San Francisco. \n“Expect more surprises during planet formation” \nAbstract: \nPlanet assembly drives materials into pressure-temperature regimes far beyond the current states of planetary objects in our solar system. As a result\, planet formation produces unfamiliar phenomena\, such impact-generated vapor bubbles in the solar nebula and fast-spinning synestias. These newly recognized phenomena lead to fresh views on how to use geochemical observations to reconstruct planet formation. URL:https://cleverplanets.org/event/talk-by-sarah-stewart-at-agu-2019/ CATEGORIES:Conference END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20191209T080000 DTEND;TZID=America/Chicago:20191213T170000 DTSTAMP:20260423T142602 CREATED:20190911T182018Z LAST-MODIFIED:20190911T182043Z UID:2050-1575878400-1576256400@cleverplanets.org SUMMARY:2019 AGU Fall Meeting DESCRIPTION:San Francisco\, CA URL:https://cleverplanets.org/event/agu-fall-meeting/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190818 DTEND;VALUE=DATE:20190824 DTSTAMP:20260423T142602 CREATED:20190619T220421Z LAST-MODIFIED:20190619T220421Z UID:1934-1566086400-1566604799@cleverplanets.org SUMMARY:Rajdeep Dasgupta and students presenting at Goldschmidt Conference DESCRIPTION:Conference held in Barcelona\, Spain. \nAbstracts: \nAssociation of Large Oxidation Events and Carbon Isotope Excursions – Increased CO2 Drawdown and Deep Recycling of Organic Carbon\n– Eguchi J\, Seales J & Rajdeep D (2019) Goldschmidt Abstracts\, 2019 \nControl of Accretion and Early Differentiation Process on the Diversity of Volatile Inventory of Rocky Solar System Objects\n– Dasgupta R\, Grewal DS & Tsuno K (2019) Goldschmidt Abstracts\, 2019 \nThe Core-Mantle Partitioning of Nitrogen in Carbon-Undersaturated Ultramafic Systems\n– Grewal D\, Hough T\, Tsuno K & Dasgupta R (2019) Goldschmidt Abstracts\, 2019 URL:https://cleverplanets.org/event/rajdeep-dasgupta-and-students-presenting-at-goldschmidt-conference/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190715 DTEND;VALUE=DATE:20190720 DTSTAMP:20260423T142602 CREATED:20190208T154256Z LAST-MODIFIED:20190208T154438Z UID:1637-1563148800-1563580799@cleverplanets.org SUMMARY:2019 Sagan Exoplanet Summer Workshop - Astrobiology for Astronomers DESCRIPTION:2019 Sagan Exoplanet Summer Workshop – Astrobiology for Astronomers\nHOSTED BY THE NASA EXOPLANET SCIENCE INSTITUTE\, HAMEETMAN AUDITORIUM\, CAHILL BUILDING\, CALIFORNIA INSTITUTE OF TECHNOLOGY\, PASADENA\, CA\nSubmit talks/posters – May 9- June 28\nFREE to register – deadline May 16 URL:https://cleverplanets.org/event/2019-sagan-exoplanet-workshop/ CATEGORIES:Conference ATTACH;FMTTYPE=image/jpeg:https://cleverplanets.org/wp-content/uploads/2019/02/exo.jpg END:VEVENT END:VCALENDAR