Article
Geosciences, Multidisciplinary
Chad J. Peel, Geoffrey H. Howarth, James M. D. Day, Petrus le Roux, Olivier Alard
Summary: This article reports the geochemical characteristics of two depleted olivine-phyric shergottite meteorites and suggests that they may originate from a volcanic center. The study finds that the earliest formed olivine megacryst cores in these meteorites are among the most Mg-rich recorded and are in equilibrium with their respective rock compositions. The findings also indicate that the crystallization process of these meteorites was not affected by crustal contamination.
JOURNAL OF AFRICAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Robert W. Nicklas, James M. D. Day, Zoltan Vaci, Arya Udry
Summary: NWA 8686 is classified as an intermediate olivine-phyric shergottite based on its mineralogy, texture, and element concentrations. It is notable for having some of the most ferroan olivine macrocrysts of any olivine-phyric shergottite. The combination of low Mg# and chondritic highly siderophile element signatures suggests unique formation processes for this meteorite.
METEORITICS & PLANETARY SCIENCE
(2022)
Article
Geochemistry & Geophysics
Jing Wang, Ben-Xun Su, Paul T. Robinson, Yan Xiao, Yang Bai, Xia Liu, Patrick Asamoah Sakyi, Jie-Jun Jing, Chen Chen, Zi Liang, Zhi-An Bao
Summary: The study examined the trace elements in olivine and found differences in trace element contents and ratios among different types of mafic-ultramafic rocks, which can be used as chemical proxies to distinguish the origin and evolution processes of the rocks.
Article
Geochemistry & Geophysics
Adrien J. Mourey, Thomas Shea, Kendra J. Lynn, Allan H. Lerner, Sarah Lambart, Fidel Costa, Jeffrey Oalmann, R. Lopaka Lee, Cheryl Gansecki
Summary: Understanding the evolution of magma genesis and intensive parameters in highly active volcanic systems is crucial for interpreting magma supply changes and anticipating future volcanic behavior. Major and trace elements in olivine are commonly used to study variations in mantle lithologies and melting conditions over time. Analysis of trace elements in olivine at Kilauea reveals changes in the mantle source and may provide important clues on subtle changes occurring at the mantle level that might herald changes in volcanic behavior.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Masashi Yoshida, Masaaki Miyahara, Hiroki Suga, Akira Yamaguchi, Naotaka Tomioka, Takeshi Sakai, Hiroaki Ohfuji, Fumiya Maeda, Itaru Ohira, Eiji Ohtani, Seiji Kamada, Takuji Ohigashi, Yuichi Inagaki, Yu Kodama, Naohisa Hirao
Summary: The NWA 7397 lherzolitic shergottite is composed of poikilitic and non-poikilitic lithologies, with a melt pocket present in the non-poikilitic lithology. Minor minerals such as chromite and ilmenite are also found in the rock. The estimated peak shock-pressure and -temperature conditions recorded in melt pockets of NWA 7397 are around 23 GPa and 2,000 degrees C, respectively.
METEORITICS & PLANETARY SCIENCE
(2021)
Article
Geochemistry & Geophysics
Stacy E. E. Phillips, Tom W. W. Argles, Clare J. J. Warren, Nigel B. W. Harris, Barbara E. E. Kunz
Summary: The morphology, cathodoluminescence response and trace element composition of kyanite in migmatite from Eastern Bhutan were studied to distinguish between sub-solidus kyanite and kyanite crystallized directly from partial melt. The findings have significant implications for the interpretation of kyanite-bearing migmatites as representing early stages of melting during Himalayan evolution.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Michael C. Jollands, Ralf Dohmen, Jose Alberto Padron-Navarta
Summary: Olivine is increasingly recognized as a crucial mineral for understanding the behavior and diffusion mechanisms of trace elements in geological materials. It serves as a powerful tool for addressing problems in petrology and volcanology, and the knowledge gained from olivine can be applied to other minerals in the Earth sciences to tackle broader questions.
Article
Geochemistry & Geophysics
Jennifer Guenther, Dejan Prelevic, Dieter F. Mertz, Alexander Rocholl, Regina Mertz-Kraus, Sandro Conticelli
Summary: The origin and geodynamic significance of Italian kamafugites and lamproites are debated due to their crustal signature and puzzling features. By analyzing olivine from San Venanzo kamafugites and Torre Alfina lamproites, we found that lamproitic olivine has high Mg# and Ni concentrations, low Ca and Mn concentrations, and high delta O-18(V-SMOW) values. In kamafugites, three genetically different olivine groups were identified, indicating compositional heterogeneity in mantle sources on small scales. The distinct geochemical features of olivine in kamafugites suggest various processes within the magma storage and transport system, involving metasomatic agents, magma mixing, and xenocryst uptake.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geology
Alkiviadis Sideridis, Federica Zaccarini, Petros Koutsovitis, Tassos Grammatikopoulos, Basilios Tsikouras, Giorgio Garuti, Konstantinos Hatzipanagiotou
Summary: Podiform chromitites in the Vavdos ophiolite are associated with dunite bodies hosted within residual mantle harzburgite, sourced from highly depleted mantle developed in fore-arc settings. The chromitites mainly occur as spinel and are enriched in platinum-group elements.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Jiang Li, Shou-Yu Chen, Yue-Hua Zhao
Summary: A study on Sn mineralization in the Gejiu area revealed that the ore-bearing granites have distinct chemical compositions compared to the barren intrusions. The ore-bearing granites are characterized by high Mn and low S content, high Y/ n-ary sumation REE and low La/Sm ratios, extreme negative Eu anomalies, and weak Ce positive anomalies. In addition, the apatites in the ore-bearing intrusions have lower Sr and higher Y contents, reflecting a higher degree of fractionation. The high F content in the apatites of the Masong and Laoka granites suggests a contribution of F-rich magma to Sn enrichment. The study also found that the exsolution of Cl-rich fluids and the crystallization of monazite and allanite can promote Sn solubility and Cu extraction. The high Li, Mn, Fe, and F contents, as well as the extremely low (Eu/Eu*)N ratios in the apatites of the ore-bearing intrusions, can be used to distinguish Sn deposits and guide Sn exploration.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Sylvie Demouchy, Olivier Alard
Summary: Our study investigates the coupling of various elements in olivines from different geological settings, revealing the diverse behavior of hydrogen and other trace elements. The concentrations of hydrogen, minor, trace, and ultra-trace elements in olivines are influenced by the petrological origins, with hydrogen showing peculiar characteristics. The presence of hydrogen is inversely correlated with certain impurities, indicating competitive behavior for vacancies, but also shows positive correlation with Ti, suggesting complex mechanisms at play in olivine.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Geochemistry & Geophysics
Evan R. Soderberg, John A. Wolff
Summary: This study reviews the major and trace element compositions of the Columbia River flood basalts and analyzes whole rocks and olivines to identify their mantle source lithologies. The results indicate a range in basalt source lithologies from pyroxenite to peridotite, with the influence of pyroxenite sources decreasing over time. The origin of the pyroxenite signature is uncertain, but possible contributors include recently subducted basalt and melting/freezing processes during basalt genesis.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Tuhin Chakraborty, Steffen H. Buttner, Gelu Costin, Charles F. Kankuzi
Summary: Gem mineralization is found in Late-Pan-African granitic pegmatites in Malawi. The geochemical characteristics of these pegmatites, as well as the evolution of the forming melts, are described using major and trace element chemistry of mica and tourmaline. The results indicate that fractional crystallization is the dominant process in melt evolution, and gem mineralization is associated with highly fractionated pegmatites that are rich in incompatible elements.
MINERALIUM DEPOSITA
(2023)
Article
Geochemistry & Geophysics
Tomohiro Usui, Kevin Righter, Charles K. Shearer, John H. Jones
Summary: The variations of Ni and Co in primary martian magmas exhibit abnormal incompatible behavior. Sulfur may have a small effect on Co partitioning, but not enough to change it from compatible to incompatible. Nearly 8000 ppm of sulfur would be required in the melt at liquidus temperature for Co partitioning to become incompatible in a martian mantle source region.
AMERICAN MINERALOGIST
(2022)
Article
Geosciences, Multidisciplinary
Debo Zhao, Shiming Wan, Zhengyao Lu, Lina Zhai, Xuguang Feng, Xuefa Shi, Anchun Li
Summary: Research suggests that the evolution of North Pacific Intermediate Water plays a role in maintaining atmospheric CO2 concentrations, especially with the delayed collapse of NPIW after the glacial termination leading to a decrease in CO2 levels.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
L. Kramer Ruggiu, J. Gattacceca, B. Devouard, A. Udry, V. Debaille, P. Rochette, J. -P. Lorand, L. Bonal, P. Beck, V. Sautter, H. Busemann, M. M. M. Meier, C. Maden, G. Hublet, R. Martinez
METEORITICS & PLANETARY SCIENCE
(2020)
Article
Geochemistry & Geophysics
V Payre, K. L. Siebach, R. Dasgupta, A. Udry, E. B. Rampe, S. M. Morrison
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2020)
Article
Geochemistry & Geophysics
Marine Paquet, James M. D. Day, Arya Udry, Ruan Hattingh, Ben Kumler, Rachel R. Rahib, Kimberly T. Tait, Clive R. Neal
Summary: The composition and abundance data of sulfides in Shergottite meteorites were studied, showing that sulfide grains in depleted and intermediate Shergottites have high HSE abundances, while sulfide grains in enriched Shergottites contain elements such as gold, palladium, and rhodium. The new findings suggest that the martian mantle and its partial melts are likely similar to or slightly higher in sulfur content compared to the Earth's mantle and its partial melts.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Review
Geochemistry & Geophysics
A. Udry, G. H. Howarth, C. D. K. Herd, J. M. D. Day, T. J. Lapen, J. Filiberto
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2020)
Article
Geochemistry & Geophysics
Peiyu Wu, Esteban Gazel, Arya Udry, Jacob B. Setera, Amanda Ostwald
Summary: NWA 2737, a Martian chassignite, provides valuable insights into the evolution of the Martian mantle and crust. By modeling fractional crystallization, it was found that compositions similar to rocks found in Gale crater can be obtained from chassignite-like parental melts. This suggests a connection between processes leading to chassignites and the rocks analyzed in Gale crater.
METEORITICS & PLANETARY SCIENCE
(2021)
Article
Geochemistry & Geophysics
Sierra R. Ramsey, Geoffrey H. Howarth, Arya Udry, Juliane Gross
Summary: The study investigates the applicability of the Al-in-olivine thermometer in conjunction with olivine chemistry to constrain the compositions and conditions of mantle sources and parental magmas of olivine-phyric shergottites. The Al-in-olivine thermometer is shown to be a robust method for determining crystallization temperatures, while olivine-spinel thermometry underestimates temperatures. Olivine chemistry reveals differences in Ni concentrations between shergottite groups, indicating distinct mantle sources.
METEORITICS & PLANETARY SCIENCE
(2021)
Article
Geochemistry & Geophysics
Robert W. Nicklas, James M. D. Day, Zoltan Vaci, Arya Udry
Summary: NWA 8686 is classified as an intermediate olivine-phyric shergottite based on its mineralogy, texture, and element concentrations. It is notable for having some of the most ferroan olivine macrocrysts of any olivine-phyric shergottite. The combination of low Mg# and chondritic highly siderophile element signatures suggests unique formation processes for this meteorite.
METEORITICS & PLANETARY SCIENCE
(2022)
Article
Geochemistry & Geophysics
Zoe E. Wilbur, Arya Udry, Francis M. McCubbin, Kathleen E. vander Kaaden, Christopher DeFelice, Karen Ziegler, Daniel Kent Ross, Timothy J. McCoy, Juliane Gross, Jessica J. Barnes, Nick Dygert, Ryan A. Zeigler, Brent D. Turrin, Christopher McCoy
Summary: Enstatite-rich meteorites, including aubrites, offer the ability to study reduced magmatism in our solar system. This study presents comprehensive petrologic and isotopic studies of 14 aubrites, finding slow cooling histories and possible heterogeneity in their parent bodies. The partitioning behavior of elements in aubrites is similar to the behavior observed in magmatic systems on Mercury.
METEORITICS & PLANETARY SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Robert W. Nicklas, James M. D. Day, Kathryn G. Gardner-Vandy, Arya Udry
Summary: Using geochemical analyses, researchers have discovered a unique andesitic meteorite that has a different origin from other known andesitic meteorites, as well as Earth's continental crust. The study also suggests that this meteorite likely formed during the early history of the Solar System, with extensive andesitic magma differentiation occurring during this time, and the formation of andesitic crust not necessarily requiring plate tectonics.
Article
Geochemistry & Geophysics
A. Udry, A. Ostwald, V. Sautter, A. Cousin, O. Beyssac, O. Forni, G. Dromart, K. Benzerara, M. Nachon, B. Horgan, L. Mandon, E. Clave, E. Dehouck, E. Gibbons, S. Alwmark, E. Ravanis, R. C. Wiens, C. Legett, R. Anderson, P. Pilleri, N. Mangold, M. Schmidt, Y. Liu, J. I. Nunez, K. Castro, J. M. Madariaga, T. Kizovski, P. Beck, S. Bernard, T. Bosak, A. Brown, S. Clegg, E. Cloutis, B. Cohen, S. Connell, L. Crumpler, V. Debaille, D. Flannery, T. Fouchet, T. S. J. Gabriel, O. Gasnault, C. D. K. Herd, J. Johnson, J. A. Manrique, S. Maurice, F. M. McCubbin, S. McLennan, A. Ollila, P. Pinet, C. Quantin-Nataf, C. Royer, S. Sharma, J. I. Simon, A. Steele, N. Tosca, A. Treiman, SuperCam Team
Summary: The Maaz formation and the Content member in Jezero crater consist of different lava flows and/or pyroclastic flows with complex textures. They display low magnesium content and a wide diversity in compositions and textures compared to other Martian igneous rocks. The study of returned Maaz samples will contribute to understanding the formation processes, improving crater counting techniques, and enhancing our knowledge of magmatism on Mars.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Multidisciplinary Sciences
Roger C. Wiens, Arya Udry, Olivier Beyssac, Cathy Quantin-Nataf, Nicolas Mangold, Agnes Cousin, Lucia Mandon, Tanja Bosak, Olivier Forni, Scott M. McLennan, Violaine Sautter, Adrian Brown, Karim Benzerara, Jeffrey R. Johnson, Lisa Mayhew, Sylvestre Maurice, Ryan B. Anderson, Samuel M. Clegg, Larry Crumpler, Travis S. J. Gabriel, Patrick Gasda, James Hall, Briony H. N. Horgan, Linda Kah, Carey Legett, Juan Manuel Madariaga, Pierre-Yves Meslin, Ann M. Ollila, Francois Poulet, Clement Royer, Shiv K. Sharma, Sandra Siljestrom, Justin Simon, Tayro E. Acosta-Maeda, Cesar Alvarez-Llamas, S. Michael Angel, Gorka Arana, Pierre Beck, Sylvain Bernard, Tanguy Bertrand, Bruno Bousquet, Kepa Castro, Baptiste Chide, Elise Clave, Ed Cloutis, Stephanie Connell, Erwin Dehouck, Gilles Dromart, Woodward Fischer, Thierry Fouchet, Raymond Francis, Jens Frydenvang, Olivier Gasnault, Erin Gibbons, Sanjeev Gupta, Elisabeth M. Hausrath, Xavier Jacob, Hemani Kalucha, Evan Kelly, Elise Knutsen, Nina Lanza, Javier Laserna, Jeremie Lasue, Stephane Le Mouelic, Richard Leveille, Guillermo Lopez Reyes, Ralph Lorenz, Jose Antonio Manrique, Jesus Martinez-Frias, Tim McConnochie, Noureddine Melikechi, David Mimoun, Franck Montmessin, Javier Moros, Naomi Murdoch, Paolo Pilleri, Cedric Pilorget, Patrick Pinet, William Rapin, Fernando Rull, Susanne Schroder, David L. Shuster, Rebecca J. Smith, Alexander E. Stott, Jesse Tarnas, Nathalie Turenne, Marco Veneranda, David S. Vogt, Benjamin P. Weiss, Peter Willis, Kathryn M. Stack, Kenneth H. Williford, Kenneth A. Farley
Summary: The study reveals that the subsurface of Jezero crater is primarily composed of volcanic and intrusive terrains with compositional and density stratification. Basaltic rocks with higher plagioclase content are found in higher stratigraphic locations, while layered rocks with more normative pyroxene are found in lower stratigraphic layers. The lowest observed unit with the highest inferred density is olivine-rich and shows characteristics of cumulate origin. The presence of alteration materials suggests relatively brief lacustrine conditions. Orbital observations connect the lithology of the Jezero floor to the broader Nili-Syrtis region, indicating regional density-driven compositional stratification.
Article
Geochemistry & Geophysics
Sammy Griffin, Arya Udry, Luke Daly, Lucy Victoria Forman, Martin R. Lee, Benjamin E. Cohen
Summary: In order to understand volcanism on other planetary bodies, quantification of physical processes is necessary. This study investigates the petrogenesis of Martian Yamato nakhlites through quantitative analysis of augite phenocrysts. The results show continuous growth of augite with minimum magma chamber residence times of 88-117 +/- 6 yr or 9-12 yr. The Yamato nakhlites are suggested to have formed as low-viscosity lava flows or sills on Mars.
METEORITICS & PLANETARY SCIENCE
(2023)
Article
Geochemistry & Geophysics
S. Alwmark, B. Horgan, A. Udry, A. Bechtold, S. Fagents, E. Ravanis, L. Crumpler, N. Schmitz, E. Cloutis, A. Brown, D. Flannery, O. Gasnault, J. Grotzinger, S. Gupta, L. Kah, P. Kelemen, K. Kinch, J. Nunez
Summary: We conducted a combined analysis of crater floor rocks in Jezero crater using geomorphologic, multispectral, and geochemical data obtained by the Mast Camera Zoom and SuperCam instruments onboard the NASA Mars 2020 Perseverance rover. Our study allows us to interpret the origins of rocks exposed along the Artuby ridge, which are predominantly lava flows with some layers formed by weathering, volcanic ash deposition, or wind-borne sediment deposition. These findings provide crucial geological context for the Maaz formation samples that will be returned to Earth and highlight the diversity and complexity of geologic processes on Mars.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Geochemistry & Geophysics
O. Beyssac, O. Forni, A. Cousin, A. Udry, L. C. Kah, L. Mandon, O. E. Clave, Y. Liu, F. Poulet, C. Quantin Nataf, O. Gasnault, J. R. Johnson, K. Benzerara, P. Beck, E. Dehouck, N. Mangold, C. Alvarez Llamas, R. B. Anderson, G. Arana, R. Barnes, S. Bernard, T. Bosak, A. J. Brown, K. Castro, B. Chide, S. M. Clegg, E. Cloutis, T. Fouchet, T. Gabriel, S. Gupta, G. Lacombe, J. Lasue, S. Le Mouelic, G. Lopez-Reyes, J. M. Madariaga, F. M. McCubbin, S. M. McLennan, J. A. Manrique, P. Y. Meslin, F. Montmessin, J. Nunez, A. M. Ollila, A. Ostwald, P. Pilleri, P. Pinet, C. Royer, S. K. Sharma, S. Schroeder, J. I. Simon, M. J. Toplis, M. Veneranda, P. A. Willis, S. Maurice, R. C. Wiens
Summary: Perseverance rover used SuperCam to study the Seitah rock formation in the Jezero crater. The research revealed unique mineralogy and texture similar to Earth rocks compared to the overlying Maaz formation. The study suggests that Seitah rocks could have similarities with other Martian rocks and meteorites.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Geochemistry & Geophysics
Briony Horgan, Arya Udry, Melissa Rice, Sanna Alwmark, Hans E. F. Amundsen, James F. F. Bell III, Larry Crumpler, Brad Garczynski, Jeff Johnson, Kjartan Kinch, Lucia Mandon, Marco Merusi, Chase Million, Jorge I. Nunez, Patrick Russell, Justin I. Simon, Michael St. Clair, Kathryn M. Stack, Alicia Vaughan, Brittan Wogsland, Andrew Annex, Andreas Bechtold, Tor Berger, Olivier Beyssac, Adrian Brown, Ed Cloutis, Barbara A. Cohen, Sarah Fagents, Linda Kah, Ken Farley, David Flannery, Sanjeev Gupta, Svein-Erik Hamran, Yang Liu, Gerhard Paar, Cathy Quantin-Nataf, Nicolas Randazzo, Eleni Ravanis, Steven Sholes, David Shuster, Vivian Sun, Christian Tate, Nick Tosca, Meenakshi Wadhwa, Roger C. Wiens
Summary: The first samples collected by the Perseverance rover on the Mars 2020 mission are from the Maaz formation, a lava plain in Jezero crater. Analysis of these samples would provide important constraints on the petrologic history and aqueous processes in the crater. However, interpreting the samples requires a detailed understanding of the emplacement and modification history of the Maaz formation.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)