Lunar and Planetary Science XLVIII (2017) sess333.pdf

Tuesday, March 21, 2017 [T333] POSTER SESSION I: MARTIAN METEORITES: GEOCHEMISTRY AND SUCH 6:00 p.m. Town Center Exhibit Area

Irving A. J. Kuehner S. M. Lapen T. J. Righter M. Busemann H. et al. POSTER LOCATION #466 Keeping Up with the Martian Meteorites and Constraining the Number of Separate Launch Sites on Mars [#2068] Petrologic, chemical, and cosmogenic nuclide criteria suggest that the 101 unpaired martian meteorites may come from as few as 20 launch sites on Mars.

Habermann M. Agee C. Spilde M. POSTER LOCATION #467 Multi-Layered Clast in Martian Breccia Northwest Africa 10922 [#2743] We performed chemical analyses of an unusual, concentrically-layered clast within the martian breccia NWA 10922.

Santos A. R. Lewis J. A. Agee C. B. Humayun M. McCubbin F. M. et al. POSTER LOCATION #468 Feldspar Variability in Northwest Africa 7034 [#2349] Northwest Africa 7034 contains feldspar of different grain size, texture, and composition, some of which suggest modification by secondary alteration.

Cao T. He Qi. POSTER LOCATION #469 Petrology and Mineral Chemistry of the Eniched Basaltic Shergottite Northwest Africa 8656 [#1384] The characterization of primary petrography and mineralogy of Northwest Africa 8656, basalt shergottite, are described in this abstract.

Jacobs G. M. Abernethey F. J. Anand M. Franchi I. A. Grady M. M. POSTER LOCATION #470 Understanding the Early Martian Environment Through the Inventory of Breccia Clasts in Northwest Africa 7034 [#2139] The clasts and matrices of Northwest Africa 7034 and its breccia clasts reveal the meteorite aggregates material from multiple sources with distinct histories.

Morita T. Sano Y. Koike M. Onda S. Takahata N. et al. POSTER LOCATION #471 Uranium-Lead Dating of Zagami Phosphates by NanoSIMS [#1816] U-Pb dating of Zagami phosphates was conducted by NanoSIMS. A total Pb/U isochron age of 245 ± 80 Ma is consistent with whole rock age but older than baddeleyite.

Moriwaki R. Usui T. Yokoyama T. POSTER LOCATION #472 Lead Isotope Systematics of Acid Residues from Depleted Olivine-Phyric Shergottites: Implications for Heterogeneous Depleted Source Mantle [#1803] Lead isotopic compositions of acid residues from Tissint and DaG 476 suggest that the depleted martian mantle has geochemical heterogeneity.

Zhang A. C. Wang S. Z. Pang R. L. Chen J. N. Gu L. X. et al. POSTER LOCATION #473 Heavy Shock Metamorphism of the Enriched Lherzolitic Shergottite Northwest Africa 7755 [#1077] We report the petrographic and mineralogical features in martian meteorite NWA 7755 to constrain its shock metamorphism and implications.

Cao F. Flemming R. L. Houde V. POSTER LOCATION #474 Mineralogy and Shock Effects in Martian Breccia NWA 8171 by In Situ Micro X-Ray Diffraction and Micro-Raman Spectroscopy [#2827] NWA 8171, the most recent addition to the Black Beauty suite: Mineralogy and shock deformation examined by complementary micro-XRD and micro-Raman spectroscopy.

Lunar and Planetary Science XLVIII (2017) sess333.pdf

Piercy J. D. Bridges J. C. Hicks L. J. MacArthur J. L. Michalowska J. POSTER LOCATION #475 Olivine Alteration of Shergottite Northwest Africa 10416 [#1915] Igneous zonation, fracturing, and oxidation trends allow a possible terrestrial origin for alteration in Northwest Africa 10416 olivine.

Meado A. L. Schwenzer S. P. Hammond S. J. Filiberto J. POSTER LOCATION #476 Crystallization History of Gabbroic Shergottite NWA 6963 as Revealed by Pyroxene Zoning [#1504] Petrogenesis of gabbroic shergottite NWA 6963 interpreted from pyroxene zoning profiles.

Jean M. M. McCanta M. C. Howarth G. H. Taylor L. A. POSTER LOCATION #477 The Martian Olivine Glossary: Common Textures and Zoning Patterns, and Implications for Ascent of Martian Magmas and their Plumbing Systems [#2067] Clues to unraveling magma storage conditions are quantified here using the compositions, textures, and zoning patterns of P in olivines from martian meteorites.

McCubbin F. M. Barnes J. J. Vander Kaaden K. E. Boyce J. W. POSTER LOCATION #478 Partitioning of F and Cl Between Apatite and a Synthetic Shergottite Liquid (QUE 94201) at 4 GPa from 1300 to 1500°C [#1732] Structure transitions / Apatite prefers chlorine / Fluorine feels betrayed.

Stephant A. Mane P. Garvie L. A. J. Hervig R. Wadhwa M. POSTER LOCATION #479 Effects of Desert Weathering on Meteoritic Hydrogen Isotope Systematics: Insights from Tissint [#1232] Multi-year terrestrial weathering studies of Tissint show dramatic changes in H2O contents and D/H in olivines within a few tens of micrometers of the surface.

Eriksen Z. T. Dorfman S. M. Velbel M. A. Li J. POSTER LOCATION #480 Contrasting Abundance of Extraterrestrial and Terrestrial Alteration Products in the Miller Range Nakhlite Meteorites [#2487] We report sharp contrasts in abundance of secondary K-sulfates between MIL 03346 and MIL 090136 using complementary application of SEM-EDS/ Raman spectroscopy.

Martin A. M. Treiman A. H. Righter K. POSTER LOCATION #481 Mapping the Iron Oxidation State in Martian Meteorites [#2624] To constrain the role of impact and alteration on the redox record of martian meteorites, we mapped the iron oxidation state in silicate crystals using XAFS.

Izawa M. R. M. Hall B. J. POSTER LOCATION #482 Spectral-Spatial Mineral Classification Using EDS X-Ray Images: Application to Shergottites [#2125] A machine learning approach is used to classify mineral regions in EDS X-ray images of a shergottite specimen.

Manzari P. De Angelis S. De Sanctis M. C. POSTER LOCATION #483 Identification of a Ca-Phosphate Grain in North West Africa 8657 Martian Meteorite by VIS-IR Micro-Imaging Spectroscopy [#1484] This abstract focuses on the VIS-IR imaging spectroscopy investigation on some grains of merrillite in the North West Africa 8657 shergottite slab.

Tkalcec B. J. Brenker F. E. POSTER LOCATION #484 EBSD Investigation of Chassignite NWA 8694 [#1617] Comparison of EBSD data of shocked chassignite NWA 8694 with those of other olivine-rich achondrites negates the influence of shock exposure on olivine LPO.

Lunar and Planetary Science XLVIII (2017) sess333.pdf

Liu Y. Ma C. Fisher W. W. Guan Y. Webb S. M. et al. POSTER LOCATION #485 Evidence for O2-Rich Environments on Mars from Hydrous Mn(IV)-Oxides in Northwest Africa (NWA) 7034 and 7533 Meteorites [#1345] First report of hydrous Mn(IV)-oxides in martian meteorites, NWA 7034 and 7533, suggesting local O2-rich environment.

Evans M. E. Niles P. B. Locke D. R. Chapman P. POSTER LOCATION #486 Isotopic Composition of Carbonates in Antarctic Ordinary Chondrites and Miller Range Nakhlites: Insights into Martian Amazonian Aqueous Alteration [#2727] Study of Antarctic OCs and MIL Nakhlites shows distinct carbonate phases and δ13C reservoirs with variable δ18O from contribution of meteoric H2O and atmospheric CO2.

Buz J. Murphy T. Kirschvink J. L. POSTER LOCATION #487 Investigating Potential Martian True Polar Wander with ALH 84001 [#2924] Magnetization directions in mutually oriented slices of ALH 84001 lie along a girdle distribution, which may be interpreted as martian true polar wander.