Results 71 to 80 of about 571,249 (212)

Mineral Cloud Formation above Magma Oceans in Sub-Neptune Atmospheres

The Astrophysical Journal Letters
The potential presence of a magma surface below a thick atmosphere primarily composed of hydrogen in some sub-Neptune exoplanets suggests a strong link between the interior composition and atmosphere through chemical coupling of volatile and refractory ...
Elspeth K. H. Lee, Aaron Werlen, Caroline Dorn   +2 more
doaj   +1 more source

The origin of Cihara granodiorite from South Banten

Indonesian Journal on Geoscience, 2014
http://dx.doi.org/10.17014/ijog.vol3no2.20085Petrographical and geochemical characteristics of the Late Oligocene Cihara Granodiorite from South Banten are presented.
Udi Hartono, Ildrem Syafri, Reza Ardiansyah   +2 more
doaj   +1 more source

Analogous diagenetic conditions of dark enclave and its host granite derived by magma mixing: Evidence for a post-mixing magmatic process

, 2020
Mafic microgranular enclaves (MMEs) are commonly formed during magma mixing and usually record contrasting physicochemical diagenetic characteristics relative to their host rocks.
Ding, Xing, Sun, Wei-Dong, Cong, Ya-Nan, Zhang, Li-Peng, Zhang, Rong-Qing, Sun, Sai-Jun, Li, Cong-Ying   +6 more
core   +1 more source

Apatite Geochemical Perspectives on the Maturation of Continental Arc Crust via Mush‐Facilitated Processes During Magmatic Flare‐Up

Geochemistry, Geophysics, Geosystems
In volcanic arcs, magma evolves from basaltic to intermediate and felsic composition, resulting in arc crust maturation. It remains unclear whether processes involving mush during magmatic flare‐ups would enhance this evolution.
Long Chen, Peng Gao, Ian Somerville, San‐Zhong Li, Jiang‐Hong Deng, Dong‐Yong Li, Sheng‐Yao Yu, Xiao‐Hui Li, Hua‐Hua Cao, Zi‐Fu Zhao, Zhi‐Feng Yin   +10 more
doaj   +1 more source

Magma Mixing Processes in a Continental Collision Zone: Insights From Mineralogical and Geochemical Constraints

Geochemistry, Geophysics, Geosystems
Eocene magmatism in southern Tibet records deep geodynamic processes associated with the India‐Asia collision. The Quxu batholith, a representative segment of the Gangdese magmatic belt, hosts widespread mafic microgranular enclaves (MMEs) indicating ...
Yuanku Meng, Jinghao Zhou, Di Wang, Junling Pei, Qingling Wang, Yu Zhang   +5 more
doaj   +1 more source

Zoning texture and chemical composition of plagioclase recording magma recharge and mixing beneath Pako guyot in the West Pacific

Solid Earth Sciences
Magma mixing results in chemical diversity and triggers eruptions, with these processes recorded in phenocryst textures. Previous research indicated that concurrent mixing and crystallization produced a mush rich in clinopyroxene beneath the Pako volcano
Liyang Wei, Xun Wei, Quanshu Yan, Yan Zhang, Xuefa Shi   +4 more
doaj   +1 more source

Recent eruptive history and magma reservoir dynamics on the southern East Pacific Rise at 17°30′S

Geochemistry, Geophysics, Geosystems, 2007
Submersible‐based geologic observations and geochemical, magnetic paleointensity, and (210Pb/226Ra) radioactive disequilibria data indicate that at least five distinct lava sequences (three normal mid‐ocean ridge basalt (N‐MORB) and two transitional mid ...
Eric C. Bergmanis, John Sinton, Kenna H. Rubin   +2 more
doaj   +1 more source

Tectonic significance of Late Precambrian calc-alkaline and alkaline magmatism in Saint Katherina Area, Southern Sinai, Egypt

Geologica Acta, 2007
Two magmatic rock suites are distinguished in the Late Precambrian basement of the Southern Sinai (NW Arabian-Nubian Shield, Egypt), namely (a) a calc-alkaline suite, and (b) an alkaline suite.
M.K. Azer
doaj   +1 more source

Magma Differentiation in Dynamic Mush Domains From the Perspective of Multivariate Statistics: Open‐ Versus Closed‐System Evolution

Geochemistry, Geophysics, Geosystems
Open‐conduit conditions characterize several of the most hazardous and active volcanic systems of basaltic composition worldwide, persistently refilled by magmatic inputs. Eruptive products with similar bulk compositions, chemically buffered by continual
A. Pontesilli, F. Di Fiore, P. Scarlato, B. Ellis, E. Del Bello, D. Andronico, J. Taddeucci, M. Brenna, M. Nazzari, O. Bachmann, S. Mollo   +10 more
doaj   +1 more source

Tracking Crystals Evolution in Episodes of Magma Mixing

Applied Sciences
Petrology and geochemistry reconstruct from plutons and eruptive products the underground chemical and thermodynamic conditions of magma at the time of crystallization.
Antonella Longo, Deepak Garg, Paolo Papale   +2 more
doaj   +1 more source