Results 61 to 70 of about 22,040 (302)

Petrographical and Mineralogical Characteristics of Bengge Alkaline Igneous Complex in Zhongdian, Western Yunnan and Its Geological Significance

Kuangchan zonghe liyong, 2022
Bengge alkaline igneous complex in Zhongdian, Western Yunnan has the variety of rock types, which is production after a complex magma—fluid process. The petrographical and mineralogical analysis of the host rock and its xenolith suggests that the igneous
Yupeng Huang, Jinxi Zou, Qingqiang Liu, Chunzhang Wu, Xianfan Liu, Jianghong Deng, Kefa Ren   +6 more
doaj   +1 more source

A Volcanological Paradox in a Thin-Section: Large Explosive Eruptions of High-Mg Magmas Explained Through a Vein of Silicate Glass in a Serpentinized Peridotite Xenolith (Hyblean Area, Sicily)

Geosciences, 2019
Ultramafic magmas (MgO ≥ 18 wt%) are generally thought to be primary mantle melts formed at temperatures in excess of 1600 °C. Volatile contents are expected to be low, and accordingly, high-Mg magmas generally do not yield large explosive ...
Alessandra Correale, Vittorio Scribano, Antonio Paonita   +2 more
doaj   +1 more source

Early Cretaceous Surtseyan volcanoes of the Baño Nuevo Volcanic Complex (Aysén Basin, Eastern Central Patagonian Cordillera, Chile)

Geologica Acta, 2010
Tens of Surtseyan tuff cones are exposed in the Río Coichel valley, between Ñireguao and Estancia Baño Nuevo (Southern Chilean Andes). The Early Cretaceous products of the submarine eruptions rest on, or are interbedded with, shallow marine sandstones of
A. DEMANT, M. SUÁREZ, R. DE LA CRUZ, O. BRUGUIER   +3 more
doaj  

Extensive Magmatic Heating of the Lithosphere Beneath the Hawaiian Islands Inferred From Salt Lake Crater Mantle Xenoliths

Geochemistry, Geophysics, Geosystems, 2020
An ongoing challenge in studies of the oceanic upper mantle is how intraplate hotspots impact the thermal structure of the lithosphere. To address this issue at the Hawaiian hotspot, we analyze mineral compositions for a petrographically diverse suite of
Imani Guest, Garrett Ito, Michael O. Garcia, Eric Hellebrand   +3 more
doaj   +1 more source

The geochemical features and oxygen isotope composition of eclogite and clinopyroxenite xenoliths from kimberlite pipes of Siberian craton [PDF]

, 2021
Tatiana Kalashnikova, S. I. Kostrovitsky, Lidiya Solovieva, Konstantin Sinitsyn, Elvira Yudintseva   +4 more
openalex   +1 more source

Thinning and Heating of Laramide Continental Lower Crust Recorded by Zircon Petrochronology

Geochemistry, Geophysics, Geosystems
Zircon grains from the metasedimentary lower crust of the Rio Grande Rift, New Mexico, preserve a metamorphic record of the transition from Laramide compression to Eocene extension.
J. H. Cipar, A. J. Smye, J. M. Garber, J. R. Reimink, A. R. C. Kylander‐Clark   +4 more
doaj   +1 more source

East Meets West: The Trace of the Mesoproterozoic Kibaran Event in the Mantle Lithosphere Beneath Eastern Tanzania

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract We present elemental geochemistry and multiple isotopic systematics (Re‐Os, Lu‐Hf, Sm‐Nd and Sr) for mantle peridotite xenoliths from Lashaine in northern Tanzania. We use the data to examine how the major Proterozoic tectono‐thermal events that affected the crust of the western Tanzanian craton are imprinted on the lithospheric mantle in the ...
Sheng‐Hua Zhou, Qiao Shu, Sally A. Gibson, Hong‐Fu Zhang, Jing‐Jing Zhu, Hélène Legros, D. Graham Pearson   +6 more
wiley   +1 more source

Sampling methane in basalt on Earth and Mars [PDF]

, 2013
Peer reviewedPublisher ...
Blamey, Nigel J F, McMahon, Sean, Parnell, John   +2 more
core   +1 more source

Two types of gabbroic xenoliths from rhyolite dominated Niijima volcano, northern part of Izu-Bonin arc: petrological and geochemical constraints

Open Geosciences, 2017
We examined the petrography, petrology, and geochemistry of two types of gabbroic xenoliths (A- and B-type xenoliths) in olivine basalt and biotite rhyolite units among the dominantly rhyolitic rocks in Niijima volcano, northern Izu-Bonin volcanic arc ...
Arakawa Yoji, Endo Daisuke, Ikehata Kei, Oshika Junya, Shinmura Taro, Mori Yasushi   +5 more
doaj   +1 more source

Creating a Critical Zone: Feedbacks Between Bedrock Geology, Water Retention, and Vegetation on an Exposed Bedrock Surface, Panola Mountain, Georgia, USA

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 1, January 2026.
Abstract Most of Earth's present‐day terrestrial surface is covered by regolith—the layers of soil, saprolite, and weathered bedrock that together comprise the critical zone. Recent research has focused on understanding fluxes of minerals, water, and energy through the critical zone under steady state assumptions.
Sean P. Bemis, W. Steven Holbrook, Brady Flinchum, Jorden Hayes, Russell Callahan, Ciaran Harman, Brad Carr, Cliff Riebe   +7 more
wiley   +1 more source