Results 61 to 70 of about 837,373 (246)

Microcodium in Chinese loess as a recorder for the oxygen isotopic composition of monsoonal rainwater [PDF]

, 2018
Records of Asia Summer Monsoon (ASM) from the Chinese loess and the speleothem display distinct features. The very different proxies that were applied to the two archives may be responsible for this discrepancy. A direct comparison between the speleothem
An, Zhisheng, Li, Gaojun, Yan, Hong, Zhang, Zeke   +3 more
core   +1 more source

The Qingzhen reaction, a fine‐grained mineral assemblage associated with djerfisherite in some EH3 chondrites: Alteration on the EH parent body

Meteoritics &Planetary Science, EarlyView.
Abstract Enstatite chondrites formed under extremely reducing conditions in the protoplanetary disk. They are derived from two or more parent bodies, EH and EL, and both EH and EL groups contain petrologic type 3–6 samples. The rare lithophile‐ and halogen‐bearing sulfide, djerfisherite, occurs in low abundance in enstatite chondrites, most frequently ...
Peter Mc Ardle, Rhian H. Jones, Luke Daly, Romain Tartèse, Patricia L. Clay, Brian O'Driscoll, Ray Burgess, William Smith, Colin How, Lewis Hughes   +9 more
wiley   +1 more source

Oxic bottom water dominates polymetallic nodule formation around the Caiwei Guyot, northwestern Pacific Ocean

Ore Geology Reviews, 2022
X. Deng, G. He, Yue Xu, Yonggang Liu, Fenlian Wang, Xiaoyu Zhang   +5 more
semanticscholar   +1 more source

Description and modeling of the Jiddat al Harasis 091 L5 strewn field

Meteoritics &Planetary Science, EarlyView.
Abstract With a size of 51.2 × 7.2 km, the 10.9 ± 1.7 ka old Jiddat al Harasis 091 L5 chondrite strewn field is the largest known in Oman. It consists of more than 700 meteorites with a total mass of >4.5 tons from which the largest six stones of >100 kg to 1.5 tons make up two thirds of the total mass.
Karl Wimmer, Edwin Gnos, Beda Hofmann, Sandro Boschetti, Jan Walbrecker, Hansruedi Maurer   +5 more
wiley   +1 more source

Timescales of carbon turnover in soils with mixed crystalline mineralogies

, 2017
Organic matter–mineral associations stabilize much of the carbon (C) stored globally in soils. Metastable short-range-order (SRO) minerals such as allophane and ferrihydrite provide one mechanism for long-term stabilization of organic matter in young ...
Bern, C., Chadwick, O., Khomo, L., Trumbore, S.   +3 more
core   +2 more sources

Similarities and differences in the dolomitization history of two coeval Middle Triassic carbonate platforms, Balaton Highland, Hungary [PDF]

, 2014
Dolomitization of platform carbonates is commonly the result of multiphase processes. Documentation of the complex dolomitization history is difficult if completely dolomitized sections are studied.
A Spadafora, AG Fischer, AM Alonso-Zarza, AM Alonso-Zarza, AM Alonso-Zarza, B Jones, C Spötl, C Spötl, C Vasconcelos, Ch Korte, D Chen, D Wright, DA Budd, DF Sibley, DT Wright, FF Whitaker, FH Nader, GD Jones, HS Chafetz, J Haas, J Haas, J Haas, J Haas, J Haas, J Rosenbaum, JA McKenzie, JAD Dickson, János Haas, K Bazargani-Guiliani, M Sánchez-Román, Orsolya Győri, PA Scholle, PW Choquette, Q Fu, R Cuia Di, R Riding, R Riding, SJ Mazzullo, Sándor Kele, T Budai, T Budai, T Budai, T Budai, T Budai, Tamás Budai, TRR Bontognali, TRR Bontognali   +46 more
core   +1 more source

Modeling enstatite chondrites: Reduced rocks with a pinch of oxidized material (affected by varying H2O(g)) derived from planetesimals shocked during the epoch of giant–planet migration

Meteoritics &Planetary Science, EarlyView.
Abstract The O‐, N‐, Mo‐, Ru‐, Os‐, Cr‐, Ti‐, Ni‐, Fe‐, Nd‐, Ca‐, Zn‐, Sr‐, and Mg‐isotopic compositions of enstatite chondrites are essentially identical to those of the Earth and Moon. These correspondences suggest enstatite chondrites formed at ≈1 AU as the only known chondrite groups that accreted in the vicinity of a major planet. Bulk Earth has a
Alan E. Rubin
wiley   +1 more source

GEOLOGICAL EXPLORATION WORKS AT THE DEPOSIT OF POLYMETALLIC NODULES IN THE CLARION–CLIPPERTON ZONE OF THE PACIFIC OCEAN: HISTORY AND RESEARCH RESULTS

, 2023
V. M. Yubko, Inna N. Ponomareva, T. I. Lygina   +2 more
openalex   +2 more sources

Mississippian (Osagean) Shallow-Water, Mid-Latitude Siliceous Sponge Spicule and Heterozoan Carbonate Facies: An Example from Kansas with Implications for Regional Controls and Distribution of Potential Reservoir Facies [PDF]

, 2006
Mixtures of biosiliceous and heterozoan-dominated carbonate deposits are commonly interpreted as recording cold-water polar or deep basinal conditions.
Franseen, Evan K.
core   +3 more sources

Occurrence and characterization of nanosulfide‐rich regions on asteroid Ryugu: Insights from mackinawite and pyrrhotite

Meteoritics &Planetary Science, EarlyView.
Abstract Samples returned from asteroid Ryugu by the Hayabusa2 mission are dominated by fine‐grained matrix material made of phyllosilicates and nanosulfides. Here, we report the mineralogical, textural, and chemical characteristics of nanosulfide‐rich regions identified in Ryugu particles.
Roberto Conconi, Hugues Leroux, Maya Marinova, Sylvain Laforet, Damien Jacob, Léna Jossé, Alice Aléon‐Toppani, Zélia Dionnet, Rosario Brunetto, Corentin Le Guillou   +9 more
wiley   +1 more source