Results 51 to 60 of about 868 (182)

Thermodynamic Constraints on H2 Production and Habitability From Mg‐Rich Serpentinites as Mars Analogs

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Serpentinization produces hydrogen and methane through abiotic water‐rock interactions, potentially supporting chemotrophic life in planetary subsurface environments. Serpentine deposits in the Martian Noachian landscapes of Nili Fossae and the Southern Highlands have been considered as potential paleo‐habitable zones. However, the geochemical
Devan M. Nisson, Mohit Melwani Daswani, Emmy B. Hughes, Scott M. Perl, Varsha M. Nair, H. M. T. G. A. Pitawala, Sanjeewa P. K. Malaviarachchi, P. L. Dharmapriya, Meththika Vithanage, Amit Basu Sarbadhikai, Francis Rivera‐Hernández, Suniti Karunatillake   +11 more
wiley   +1 more source

U-Pb ISOTOPIC GEOCHRONOLOGY OF THE MONAZITE GNEISSES OF THE «ZELENOLEVADIVSKA SUITE» OF THE MIDDLE BUG REGION

Геологія і корисні копалини Світового океану, 2022
On the right bank of the South Bug river valley, opposite the village of Zelena Levada crystalline rocks are observed in separate scattered rock outcrops, more than 1 km long along the river bed. A bundle of hypersthene-biotite and biotite plagiogneisses
Stepanyuk L.M.
doaj   +1 more source

Monazite and Xenotime U‐Pb Geochronology and Thermometry of the Blue Ridge and Inner Piedmont of North Carolina: Implications for the Thermal‐Metamorphic Evolution of the Southern Appalachian Metamorphic “Core”

Tectonics, Volume 45, Issue 5, May 2026.
Abstract The southern Appalachian orogen preserves a complex distribution of metamorphism and deformation varying in timing, magnitude, and spatial extent. These complexities give rise to disparate interpretations for southern Appalachian tectonic evolution, which complicates the testing and interpretation of tectonic models in this system.
Nicholas E. Powell, J. Ryan Thigpen, Brandon M. Spencer, Arthur J. Merschat, David P. Moecher, Calvin A. Mako, Robert D. Hatcher Jr., Harold H. Stowell, Andrew Kylander‐Clark   +8 more
wiley   +1 more source

CHAROITE. EXPERIMENTAL STUDIES

Геодинамика и тектонофизика, 2016
The article provides an overview of experimental studies of charoite and charoite-containing rock formation hypotheses. The authors conducted experiments to clarify charoite and host rocks interaction and study charoite transformation processes at high ...
M. V. Marchuk, V. Ya. Medvedev, L. A. Ivanova, T. S. Sokolova, B. S. Danilov, D. P. Gladkochub   +5 more
doaj   +1 more source

IV.—On Soda-Microcline from Kilimandscharo [PDF]

Geological Magazine, 1889
The material, in which this felspar occurs, was collected by Dr Hans Meyer during his visit in 1887 to the East-African “snowmountain,” the Kilimandscharo, and kindly entrusted to me for description by Prof. F. Zirkel of Leipzig, to whom I desire to express my indebtedness for assistance and advice supplied me whilst working in his laboratory.The rocks
openaire   +1 more source

Multi‐Proxy Thermal History of Basin Heating During Cordilleran Orogenesis in the Magallanes‐Austral Retroarc Foreland Basin, Patagonian Andes

Basin Research, Volume 38, Issue 3, May–June 2026.
Paleogene unconformity development from ~64 to 22 Ma for the Magallanes‐Austral retroarc foreland basin (MAB). Schematic shows (A) MAB foreland subsidence and basin infilling, (B) onset of cooling and basin inversion as subducting plate shallows, (C) continued foreland uplift, erosion and cooling as the oblique Farallon‐Phoenix ridge subducts beneath ...
Rebecca A. VanderLeest, Julie C. Fosdick, Theresa M. Schwartz, Ethan G. Hyland, Maria Mastalerz   +4 more
wiley   +1 more source

Microspherules formed by lightning strikes

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 743-767, May 2026.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

Microstructures in Two Alkali Feldspar Megacrysts from the Papuk Mt., Croatia

Geologia Croatica, 2004
Two types of megacrysts, one from Pakra Creek and the other from the Sloboština Creek locality proved to be low microcline in associationwith low albite and quartz.
Viktoria Kovacs Kis, Marija Horvat, Istvan Dodony   +2 more
doaj   +1 more source

Thermodynamic model of the hydrolysis of microcline in acid-sulfate solutions [PDF]

, 1976
A theoretical model of the hydrolysis of microcline by a hydrothermal solution has been determined for a closed system at constant temperature. Hypothetical solution compositions and temperatures were chosen to match the known geothermal system at Roosevelt Hot Springs, Utah.
Dedolph, R.E., Parry, W.T.
openaire   +4 more sources

Constraining the Relative Chronology of Repeated Large Earthquakes in the Longmen Shan Thrust Belt, Eastern Tibetan Plateau

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract The Yingxiu–Beichuan Fault Zone (YBFZ), located in the Longmen Shan Thrust Belt (LSTB) on the eastern Tibetan Plateau, is highly seismically active. However, direct evidence of large earthquakes at depth is scarce. Here, we present rock magnetic, microstructural, and geochemical analyses of four fault zones from the Wenchuan Earthquake Fault ...
Lei Zhang, Haibing Li, Zhiming Sun, Yong Cao, Chunrui Li, Huan Wang, Yong Zheng, Jialiang Si   +7 more
wiley   +1 more source