Results 71 to 80 of about 3,614 (211)

Tracing Mantle Sources to Tectono–Magmatic Settings: Machine Learning Classification of Basalts Over the Past 1 Billion Years

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract The geochemical heterogeneity of the mantle, recorded by mantle‐derived basalts, offers crucial insights into the evolution of mantle sources. However, recognizing mantle end‐members of basalts is challenging, as traditional trace element proxies yield ambiguous overlapping results in older basalts.
Jilian Jiang, Ross N. Mitchell, Xinyu Zou, Peng Peng, Chong Wang   +4 more
wiley   +1 more source

Assembly and concept of a web-based GIS within the paleolimnological project CONTINENT (Lake Baikal, Russia) [PDF]

, 2008
Web-based Geographical Information Systems (GIS) are excellent tools within interdisciplinary and multi-national geoscience projects to exchange and visualize project data.
Fagel, Nathalie, Heim, Birgit, Klump, Jens, Oberhaensli, Hedi   +3 more
core   +1 more source

Machine Learning Model for Assessing Melting Pressure Conditions of the TTG Genesis: Implications for the Timing of the Onset of Global Plate Tectonics

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Understanding the pressure conditions of the formation of tonalite‐trondhjemite‐granodiorite (TTG) series rocks is important, as these rocks are key constituents of the Archean continental crust. However, the detailed pressure history of Archean TTG gneisses remains ambiguous due to uncertainties surrounding their sources and the effects of ...
Denggang Lu, Jia Liu, Qunke Xia, Zhikang Luan, Jingjun Zhou, Kailong Yang, Eero Hanski   +6 more
wiley   +1 more source

MINERALOGY AND ZIRCON AGE OF CARBONATITES OF THE SREDNYAYA ZIMA COMPLEX (EASTERN SAYAN)

Геодинамика и тектонофизика
The Srednyaya Zima alkaline-ultramafic carbonatite complex is located in the Eastern Sayan and is a part of the area of manifestation of Neoproterozoic rare-metal alkaline-carbonatite magmatism along the southern and southeastern margins of the Siberian ...
I. R. Prokopyev, A. G. Doroshkevich, M. D. Varchenko, D. V. Semenova, I. A. Izbrodin, M. N. Kruk   +5 more
doaj   +1 more source

Ordovician 40Ar/39Ar phengite ages from the blueschist-facies Ondor Sum subduction-accretion complex (Inner Mongolia) and implications for the early Paleozoic history of continental blocks in China and adjacent areas

, 2006
We obtained 453.2 ± 1.8 Ma and 449.4 ± 1.8 Ma (2{sigma}) laser step-heating 40Ar/39Ar plateau ages for phengite from quartzite mylonites from the blueschist-facies Ondor Sum subduction-accretion complex in Inner Mongolia (northern China).
de Jong, Koenraad, Lo, Ching-Hua, Masago, Hideki, Windley, Brian F., Xiao, Wenjiao   +4 more
core   +3 more sources

Olivine in the Udachnaya-East kimberlite (Yakutia, Russia): types, compositions and origins [PDF]

, 2007
Olivine is the principal mineral of kimberlite magmas, and is the main contributor to the ultramafic composition of kimberlite rocks. Olivine is partly or completely altered in common kimberlites, and thus unavailable for studies of origin and evolution ...
Demouchy, S, Faure, K, Golovin, AV, Kamenetsky, MB, Kamenetsky, VS, Kuzmin, DV, Sharygin, VV, Sobolev, AV   +7 more
core   +3 more sources

New Permian Paleomagnetic and Geochronologic Results From the Alxa Block: Constraints on Its Tectonic Affinity and the Closure of Paleo‐Asian Ocean

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract The Paleo‐Asian Ocean's (PAO) closure timing and the Alxa Block's (ALB) tectonic affinity remain debated. We present new paleomagnetic and geochronologic data from Permian volcanic and sedimentary rocks in the ALB. Characteristic remanent magnetization (ChRM) directions from Early (∼282 Ma), Middle (∼268 Ma), and Late Permian (∼255 Ma) rocks ...
Wei Xu, Bo Song, Jizhong Shi, Yan Li, Baowen Wang, Xiaozhou Ye, Xiaofeng Han, Haihong Xu, Yunpeng Zhang, Huiyuan Zhang, Zhiming Sun   +10 more
wiley   +1 more source

Overview of early cretaceous gold mineralization in the orogenic belt of the eastern margin of the Siberian craton: geological and genetic features

Frontiers in Earth Science
The giant Verkhoyansk-Kolyma gold province, producing more than∼ 3700 t of gold, is one of the most important metallogenic provinces for orogenic gold deposits in the world. The province is located on the eastern margin of the Siberian craton.
Nikolay Goryachev, Valery Fridovsky, Valery Fridovsky   +2 more
doaj   +1 more source

On the structure and formation of earthquake sources in the faults located in the subsurface and deep levels of the crust. Part II. Deep level

Геодинамика и тектонофизика, 2018
In the part 2 of the study [Ruzhich, Kocharyan, 2017, we aimed at identifying the elements of paleoearthquake sources in the crust, which formed at the hypocentral depths in the exhumed Primorsky segment of the ancient collisional suture.
V. V. Ruzhich, G. G. Kocharyan, V. B. Savelieva, A. V. Travin   +3 more
doaj   +1 more source

Precambrian Greenstone Belts of North Baffin Island, Canadian Arctic: Geochronological Constraints on Magmatism and Stratigraphy in the Rae Craton

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract Supracrustal greenstone belts of the Rae craton of north Baffin Island have been historically attributed to the Mary River Group (MRG), a key tectonostratigraphic unit of economic significance. Best‐preserved exposures of supracrustal rocks occur within the Eqe Bay Greenstone Belt.
B. M. Saumur, C.‐P. Folkesson, D. R. Skipton, J. H. F. L. Davies, N. Wodicka, S. T. Johnston   +5 more
wiley   +1 more source