Results 51 to 60 of about 4,537 (187)

Stratigraphy of Carbonate‐Bearing Rocks at the Margin of Jezero Crater, Mars: Evidence for Shoreline Processes?

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Martian carbonate‐bearing rocks are compelling targets for exploration because they preserve detailed records of past aqueous processes, climate, and habitability. The Margin unit in Jezero crater is a distinct olivine‐ and carbonate‐bearing unit stratigraphically underlying the western fan, lining the inner margin of the western crater rim ...
Alexander J. Jones, Sanjeev Gupta, Robert Barnes, Briony H. N. Horgan, Kenneth H. Williford, Gerhard Paar, Kathryn. M. Stack, Bradley J. Garzcynski, Eleni Ravanis, Candice C. Bedford, Justin I. Simon, Athanasios Klidaras, Linda C. Kah, James F. Bell, Justin Maki, Stephen W. Lokier, Adrian Brown, Nathan R. Williams, Sanna Alwmark, Jorge I. Núñez, Fred Calef, Larry Crumpler, Alicia Vaughan, Libby R. W. Ives, Sam Gwizd, Ken Farley, Christian Tate, Nicolas Randazzo, Olivier Beyssac, Gwénaël Caravaca   +29 more
wiley   +1 more source

Delivery of Dark Material to Vesta via Carbonaceous Chondritic Impacts

, 2012
NASA's Dawn spacecraft observations of asteroid (4) Vesta reveal a surface with the highest albedo and color variation of any asteroid we have observed so far. Terrains rich in low albedo dark material (DM) have been identified using Dawn Framing Camera (
Adams, Andreas Nathues, Andrew W. Beck, Beck, Binzel, Binzel, Bogard, Bottke, Bottke, Buchanan, Buchanan, Christopher T. Russell, Cloutis, Cloutis, Daniel D. Durda, David Blewett, David Mittlefehldt, David Nesvorny, David P. O’Brien, Debra Buczkowski, Desnoyers, Edward A. Cloutis, Elizabeth M. Palmer, Gaffey, Gaffey, Gomes, Gounelle, Grady, Harry Y. McSween, Hasegawa, Hiroi, Holger Sierks, Holsapple, Jaumann, Jean-Philippe Combe, Jennifer E.C. Scully, Jian-Yang Li, Jutzi, Keil, Kris J. Becker, Le Corre, Levison, Love, Love, Lucille Le Corre, Mayne, Megha U. Bhatt, Melosh, Michael J. Gaffey, Mittlefehldt, Nesvorny, Nesvorny´, O’Brien, Paul J. Mann, Reddy, Reddy, Rivkin, Robert Gaskell, Rubin, Sierks, Svetsov, Taylor, Thomas, Thomas B. McCord, Tsiganis, Vishnu Reddy, Wasson, William F. Bottke, Wilson, Wilson, Wilson, Zolensky   +71 more
core   +1 more source

Casting Design Optimization for Steam Turbine Emergency Stop Valve (ESV) Housing with Computational Casting Simulation Method [PDF]

, 2018
Design optimization casting emergency stop valve steam turbine, has been done with casting simulation using Magmasoft v5 software. By simulation, some casting design parameters are changed to get more optimal results.
F, B. N. (Budi), Harmadi, R. (Rudias), Herbandono, K. (Khamda), Krisnowo, A. (Agus)   +3 more
core   +1 more source

Formation and Alteration of Olivine‐Carbonate Rocks Within Jezero Crater as Constrained by In Situ Visible/Near‐Infrared Multispectral Images

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Olivine‐ and carbonate‐bearing rocks are key exploration targets on Mars because of the information they can provide about magma evolution and source characteristics, implications for surface water availability and climate, and their biosignature preservation potential.
E. Ravanis, C. C. Bedford, B. Horgan, B. Garczynski, A. Vaughan, J. R. Johnson, M. Rice, A. J. Jones, S. Fagents, A. Klidaras, S. Gupta, J. Núñez, K. Lapo, E. A. Cloutis, J. F. Bell III, R. C. Wiens, A. Brown   +16 more
wiley   +1 more source

Gold Mineralizing Potential of the Late Triassic Calcareous, Carbonaceous and Sulfide‐Rich Sedimentary Rocks of the Isatomae Formation in the South Kitakami Belt, Japan

Resource Geology, Volume 76, Issue 1, January/December 2026.
Isatomae Formation illustrating mineralogical and geochemical characteristics. (a) Overview of the Isatomae Formation, showing the marine anoxic environment and related biogenic processes. (b) Deposition of metal‐rich Fe oxyhydroxides were transformed into sulfides through diagenesis and low grade metamorphism.
June Born Born, Yasushi Watanabe, Takuya Echigo, Yoshiaki Kon, Takumi Mimura   +4 more
wiley   +1 more source

Geologists of Russian origin in Latin America [PDF]

, 2018
Se describe la vida y trayectoria de geólogos que más allá de su nacionalidad (rusa, ucraniana, tártara, alemana, etc.), nacieron en territorios que pertenecieron al Imperio Ruso, la Unión Soviética o la Federación Rusa, y de sus descendientes graduados ...
Alonso, Ricardo, Boltovskoy, Demetrio, Charrier González, Reynaldo, Durand Delga, Michel, Minina, Elena, Riccardi, Alberto Carlos, Tchoumatchenco, Platon, Wiasemsky, Michel   +7 more
core   +1 more source

Trace-element abundances in the shallow lithospheric mantle of the North Atlantic Craton margin: implications for melting and metasomatism beneath Northern Scotland [PDF]

, 2015
Bulk rock geochemistry and major- and trace-element compositions of clinopyroxene have been determined for three suites of peridotitic mantle xenoliths from the North Atlantic Craton (NAC) in northern Scotland, to establish the magmatic and metasomatic ...
Bonadiman, Brian G. J. Upton, Goodenough, Green, Hannah S. R. Hughes, Hilary Downes, Hunter, Iain McDonald, John W. Faithfull, Kirstein, Long, Park, Pearce, Rollinson, Saunders, Silver, Tanner, Tompkins, Upton   +18 more
core   +4 more sources

Catalyst Design–Performance Relationships for the Selective Catalytic Hydrogenation of Furfural to Furfuryl Alcohol

Journal of Chemistry, Volume 2026, Issue 1, 2026.
The transition from fossil resources to renewable biomass for fuel and chemical production requires efficient catalytic technologies. Furfural (FF), a key platform molecule derived from hemicellulose, serves as a crucial bridge between biomass and value‐added chemicals.
Thapelo Baoketsi, Nyasha Makuve, Florence Nareetsile, Sohini Basu Roy   +3 more
wiley   +1 more source

Natural geochemical risk in the Pollino Massif: a case-study of chromium

Frontiers in Genetics, 2015
The geochemical risk linked to heavy metal contamination of soils and waters, commonly associated with anthropogenic causes, may, however, be linked to the presence of rocks and soils that naturally contain these metals.
Priscilla Boccia, Salvatore Margiotta
doaj   +1 more source

A century of oil and gas exploration in Albania: assessment of Naturally Occurring Radioactive Materials (NORMs)

, 2015
Because potential Naturally Occurring Radioactive Materials (NORMs) generated from oil and gas extractions in Albania have been disposed without regulatory criteria in many decades, an extensive survey in one of the most productive regions (Vlora-Elbasan)
Baldoncini, Marica, Callegari, Ivan, Colonna, Tommaso, Hasani, Fadil, Kaçeli, Merita Xhixha, Mantovani, Fabio, Shala, Ferat, Strati, Virginia, Xhixha, Gerti   +8 more
core   +1 more source