Results 171 to 180 of about 7,378 (260)

Methane Adsorption During Pore Evolution and Its Microscale Impact on Coalbed Methane Recovery: A Case Study of Middle- and High-Rank Coals in the Western Guizhou. [PDF]

ACS Omega
Xu A, Han S, Wei Y, Zhou P, Zhang J, Guo Z.   +5 more
europepmc   +1 more source

Origin and formation of a chondritic xenolith in Krymka (LL3.2, breccia): Indications for a late formation of the accretionary breccia

Meteoritics &Planetary Science, EarlyView.
Abstract An unusual chondritic xenolith was found in two sequentially prepared thin sections of a sample from the Krymka (LL3.2) chondrite. The xenolith has a rounded, slightly deformed shape of about 5 mm in apparent diameter and is partially surrounded by a double rim made of an inner fine‐grained silicate‐rich rim and an outer sulfide‐rich rim.
Aelita Girich, Addi Bischoff, Samuel Ebert, Kazuhide Nagashima, Andreas Morlok, Harald Hiesinger, Jasper Berndt   +6 more
wiley   +1 more source

Trivalent titanium in high-titanium lunar ilmenite. [PDF]

Nat Commun
Vira AD, Burgess KD, First EC, Tian M, Eames KM, Trivedi RS, Dotson GK, Kim DM, Farr TP, Lisabeth H, Tamura N, Livernois ER, Jones BM, Orlando TM, Jiang Z, First PN.   +15 more
europepmc   +1 more source

Potassium isotopic compositions and exposure ages of evolved and silica‐rich achondrites

Meteoritics &Planetary Science, EarlyView.
Abstract Some of the oldest igneous rocks in the Solar System include evolved and silica‐rich achondrites that originate from parent bodies less than 1000 km in diameter, referred to as planetesimals. While Earth was initially in a molten state and required continental crust formation and plate tectonics to generate andesite bulk compositions, evolved ...
Z. Vaci, Z. Tian, P. Koefoed, M. Habermann, M. Humayun, K. Ziegler, H. Busemann, D. Krietsch, J. M. D. Day, K. Wang   +9 more
wiley   +1 more source

Lower-mantle iron heterogeneity constrained by the electrical conductivity of Al-bearing bridgmanite. [PDF]

Sci Adv
Han K, Özaydın S, Fei H, Man L, Wang F, Chanyshev A, Withers AC, Grayver A, Katsura T.   +8 more
europepmc   +1 more source

Trimerous magnoliid flowers with a unique set of floral and pollen traits from the Late Cretaceous of Southern Bohemia (Czech Republic)

New Phytologist, EarlyView.
Morphospace position and phylogenetic placements of Trimeriantha monopolyada. Summary Floral structure is a key aspect of angiosperm diversity. Recent research revealed that significant floral disparity was already present in the Cretaceous. However, our understanding of early floral diversity remains limited, as it is directly dependent on the fossil ...
Xieting Wu, Maria von Balthazar, Friðgeir Grímsson, Silvia Ulrich, Andrea M. López‐Martínez, Zuzana Heřmanová, Jiří Kvaček, Jürg Schönenberger   +7 more
wiley   +1 more source

Organic petrology and geochemistry evaluation of upper Permian source rocks in the Lower Yangtze Area. [PDF]

Sci Rep
Zhao Q, Wang J, Yang Y, Chen J, Liang J, Zhang Y, Dong H.   +6 more
europepmc   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

Sedimentology, EarlyView.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi, Isabel Abad, Elisa Laita, Ali Mokhtar Samet, Matías Reolid   +4 more
wiley   +1 more source

Carbonate- and silicate-metasomatized mantle beneath Himalayan-Tibetan orogenic belt. [PDF]

Commun Earth Environ
Li W, Yang Z, Zajacz Z, Zhou L, Hou Z.
europepmc   +1 more source

Bed‐scale quantitative discrimination of hyperpycnites from intrabasinal turbidites—Results from a channelised slope system in the Upper Carboniferous Westward Ho! Formation, United Kingdom

Sedimentology, EarlyView.
ABSTRACT Features considered indicative of hyperpycnites and intrabasinal turbidites overlap. Outcrop study presented here suggests that the Westward Ho! Formation forms an 800 m high deepwater‐slope system dominated by hyperpycnites. Taking this unit, and other successions where hyperpycnites have been described, as having been deposited solely from ...
Tony Reynolds
wiley   +1 more source