A persistently low level of atmospheric oxygen in Earth’s middle age

Autor: Xiao-Ming Liu, Linda C. Kah, Andrew H. Knoll, Huan Cui, Chao Wang, Andrey Bekker, Robert M. Hazen

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)

Constraining the rise in atmospheric oxygen through the early Earth is important to understand the evolution of complex life. Here, the authors find that a major rise in atmospheric oxygen level occurred after the Great Oxidation Event, followed by p

Externí odkaz: https://doaj.org/article/1da948754dc94f91a9860168ce6799f3

Aqueous alteration processes in Jezero crater, Mars—implications for organic geochemistry

Autor: Eva L. Scheller, Joseph Razzell Hollis, Emily L. Cardarelli, Andrew Steele, Luther W. Beegle, Rohit Bhartia, Pamela Conrad, Kyle Uckert, Sunanda Sharma, Bethany L. Ehlmann, William J. Abbey, Sanford A. Asher, Kathleen C. Benison, Eve L. Berger, Olivier Beyssac, Benjamin L. Bleefeld, Tanja Bosak, Adrian J. Brown, Aaron S. Burton, Sergei V. Bykov, Ed Cloutis, Alberto G. Fairén, Lauren DeFlores, Kenneth A. Farley, Deidra M. Fey, Teresa Fornaro, Allison C. Fox, Marc Fries, Keyron Hickman-Lewis, William F. Hug, Joshua E. Huggett, Samara Imbeah, Ryan S. Jakubek, Linda C. Kah, Peter Kelemen, Megan R. Kennedy, Tanya Kizovski, Carina Lee, Yang Liu, Lucia Mandon, Francis M. McCubbin, Kelsey R. Moore, Brian E. Nixon, Jorge I. Núñez, Carolina Rodriguez Sanchez-Vahamonde, Ryan D. Roppel, Mitchell Schulte, Mark A. Sephton, Shiv K. Sharma, Sandra Siljeström, Svetlana Shkolyar, David L. Shuster, Justin I. Simon, Rebecca J. Smith, Kathryn M. Stack, Kim Steadman, Benjamin P. Weiss, Alyssa Werynski, Amy J. Williams, Roger C. Wiens, Kenneth H. Williford, Kathrine Winchell, Brittan Wogsland, Anastasia Yanchilina, Rachel Yingling, Maria-Paz Zorzano

Publikováno v: Science. 378:1105-1110

The Perseverance rover landed in Jezero crater, Mars, in February 2021. We used the Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) instrument to perform deep-ultraviolet Raman and fluorescence spectro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2bfe113b05c58d934cd311e5dea4bb3
https://doi.org/10.1126/science.abo5204

Regolith of the Crater Floor Units, Jezero Crater, Mars:Textures, Composition, and Implications for Provenance

Autor: Alicia Vaughan, Michelle E. Minitti, Emily L. Cardarelli, Jeffrey R. Johnson, Linda C. Kah, Paolo Pilleri, Melissa S. Rice, Mark Sephton, Briony H. N. Horgan, Roger C. Wiens, R. Aileen Yingst, Maria‐Paz Zorzano Mier, Ryan Anderson, James F. Bell, Adrian J. Brown, Edward A. Cloutis, Agnes Cousin, Kenneth E. Herkenhoff, Elisabeth M. Hausrath, Alexander G. Hayes, Kjartan Kinch, Marco Merusi, Chase C. Million, Robert Sullivan, Sandra M. Siljeström, Michael St. Clair

Publikováno v: Vaughan, A, Minitti, M E, Cardarelli, E L, Johnson, J R, Kah, L C C, Pilleri, P, Rice, M S, Sephton, M, Horgan, B H N, Wiens, R C, Yingst, R A, Zorzano Mier, M-P, Anderson, R, Bell, J F, Brown, A J, Cloutis, E A, Cousin, A, Herkenhoff, K E, Hausrath, E M, Hayes, A G, Kinch, K, Merusi, M, Million, C C, Sullivan, R, Siljestrom, S M & St Clair, M 2023, ' Regolith of the Crater Floor Units, Jezero Crater, Mars : Textures, Composition, and Implications for Provenance ', Journal of Geophysical Research-Planets, vol. 128, no. 3, e2022JE007437 . https://doi.org/10.1029/2022JE007437

A multi-instrument study of the regolith of Jezero crater floor units by the Perseverance rover has identified three types of regolith: fine-grained, coarse-grained, and mixed-type. Mastcam-Z, Wide Angle Topographic Sensor for Operations and eNgineer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e62bdb35e42d6e52eb5377f2e48f16b
https://curis.ku.dk/portal/da/publications/regolith-of-the-crater-floor-units-jezero-crater-mars(7d5bc4d9-f25b-436d-81d4-4dbb4fef1cda).html

Testing Rover Science Protocols to Identify Possible Biosignatures on Mars: Achieving Sampling Goals Under a Highly Constrained Time Line

Autor: R. Aileen Yingst, Julie K. Bartley, Thomas J. Chidsey, Barbara A. Cohen, Natalie Curran, Brian M. Hynek, Linda C. Kah, Michelle E. Minitti, Michael D. Vanden Berg, Rebecca M.E. Williams, John Gemperline, Michael Lotto, Sarah Black, Bruce C. Bartley, Taylor Pearson

Publikováno v: Astrobiology. 22(11)

At a Mars analog site in Utah, we tested two science operation methods for data acquisition and decision-making protocols: a scenario where the tactical day is preplanned, but major adjustments may still be made before plan delivery; and a scenario i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::528c6a131ceef416527129ea7619f0c5
https://pubmed.ncbi.nlm.nih.gov/36112369

Carbonate fabric diversity and environmental heterogeneity in the late Mesoproterozoic Era

Autor: Julie K. Bartley, Linda C. Kah

Publikováno v: Geological Magazine. 159:220-246

Time-distinctive features within carbonate rocks, specifically the presence, abundance and distribution of stromatolites, molar-tooth fabric and specific morphologies of marine cement, have been identified as potential indicators of global-scale chan

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::40a1f097d65a1e990dcb8255dbedacdd
https://doi.org/10.1017/s0016756821000406