Results 51 to 60 of about 806 (206)

Early–Late Carboniferous Tectonic Evolution of the Northern North China Craton (NE China): Constraints From Zircon Ages, Geochemistry, and Crustal Thickness Modeling

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The tectonic evolution of the northern margin of the North China Craton (NCC) remains controversial. In this study, we obtained zircon U–Pb ages, geochemical data, and Sr–Nd isotopic data for volcanic rocks, and detrital zircon ages for sedimentary rocks from the Yufutun, Tongqigou, and Benxi formations in central‐southern Jilin Province, NE ...
Yunfei Chang, Qingxiang Du, Huachun Gan, Xiaoli Shen, Zuozhen Han, Xiaoxue Hou, Huicong Zhang   +6 more
wiley   +1 more source

Concurrent adakitic and non-adakitic Late Miocene-Quaternary magmatism at the Sahand volcano, Urumieh-Dokhtar Magmatic Arc (NW Iran)

Lithos, 2023
The Sahand volcano in NW Iran is characterised by voluminous Late Miocene to Quaternary magmatic activity. Petrographic, mineral chemical, whole-rock geochemical and Sr-Nd-Pb isotope data allowed to identify two rock groups, continuously emplaced from the ancient Paleo-Sahand to the later Neo-Sahand stages.
Fedele L., Mehdipour Ghazi J., Agostini S., Ronca S., Innocenzi F., Lustrino M.   +5 more
openaire   +4 more sources

Crustal Thickness Inversion From Magmatic Geochemistry Reveals Spatiotemporal Evolution and Two‐Stage Uplift of the Iranian Plateau

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The Cenozoic topographic growth of the Iranian Plateau, situated at the Arabia‐Eurasia collision front, provides insights into continental collision dynamics. However, the relative contributions of tectonic shortening versus deep mantle processes to crustal thickening remain debated because systematic quantitative constraints on paleo‐crustal ...
Jun Hu, Yongwei Zhao, Zhengquan Chen, Ni Li, Huan Kang   +4 more
wiley   +1 more source

Tectonic Evolution and Crustal Growth of the East Kunlun Orogen, NW China: Insights From the Late Permian–Triassic Granitoids

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The East Kunlun Orogen (EKO) on the northern margin of the Tibetan Plateau experienced complex Late Paleozoic–Early Mesozoic tectono‐magmatic activities associated with the subduction and closure of the Paleo‐Tethys Ocean. Controversies remain regarding the timing and processes of the transition from subduction to collision and post‐collision,
Xiaodong Wang, Chao Wang, Liyun Zhang, Jinxiang Li, Yahui Yue, Lin Ding   +5 more
wiley   +1 more source

Is there a Grenvillian basement in the Guerrero-Morelos Platform of Mexico?

Geologica Acta, 2007
In the Guerrero-Morelos platform (Guerrero State, Mexico) the adakitic rocks of Early Tertiary age contain abundant hornblende-rich tonalite xenoliths. Zircon crystals have been concentrated from both adakites and xenoliths, and dated using in-situ U-Pb ...
G. Levresse, J. Tritlla, E. Deloule, P. J. PINTO LINARES   +3 more
doaj   +1 more source

Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast Asia

Journal of Asian Earth Sciences: X, 2022
In the northwestern Korean Peninsula, Cretaceous volcanic rocks are composed of andesite, andesite-dacite and rhyolite intercalated with terrigenous clastic rocks.
Jonghyok Yang, Hyonchol Ku, Ung Pak, Chungil Ri, Myongchol Kim, Cholsu Jong, Hyonuk Pak, Jongnam Kim, Songhyok Ju, Cholhyon Kim, Jusong Yun, Sunghyon Kim   +11 more
doaj   +1 more source

Constraining Sources of Mid‐Pleistocene to Present Explosive Volcanism in the Gulf of Alaska Using Machine Learning and Compositional Data Analysis

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract The long‐term eruptive record of a region helps better elucidate magmatic processes at depth as well as volcanic hazards at the surface. Typically, reconstructing such records is done using proximal tephrostratigraphy and linking individual tephras to source volcanoes. These records, however, can only be accurately constructed if they are both
Jordan Lubbers, Matthew Loewen, Kristi Wallace   +2 more
wiley   +1 more source

Petrochemical characteristics of late Paleozoic magmatic rocks of the Mandakh area, southeast Mongolia

Mongolian Geoscientist, 2018
The late Paleozoic magmatic rocks are widely distributed in the Mandakh area which is located in the Gurvansaikhan and Manlai terrains, where porphyry Cu deposits occur.
Undarmaa Batsaikhan, Tsuchiya Noriyoshi, Chimedtseren Anaad, Batkhishig Bayaraa   +3 more
doaj   +1 more source

Petrogenesis of the Riacho do Icó Stock: evidence for Neoproterozoic slab melting during accretion tectonics in the Borborema Province?

Brazilian Journal of Geology, 2020
One of the main characteristics of the Borborema Province in northeastern Brazil is the abundance of granitic domains. The Lagoa das Pedras plutonic-volcanic Complex record remnants of early to late Neoproterozoic primitive to highly evolved magmas. U-Pb
Lauro Cézar Montefalco de Lira Santos, Haroldo Monteiro Lima, Geysson de Almeida Lages, Fabrício de Andrade Caxito, José Ferreira de Araújo Neto, Ignez de Pinho Guimarães   +5 more
doaj   +1 more source

Magma and Mineral Composition Response to Increasing Slab-Derived Fluid Flux: Nevado de Longaví Volcano, Southern Chilean Andes

Frontiers in Earth Science, 2022
Nevado de Longaví volcano (NLV), in the Southern-Central Chilean Andes, has erupted during the Holocene magmas with compositions that are in several ways atypical for the region.
Daniel Sellés, Daniel Sellés, Michael Dungan, Charles Langmuir, Ana Carolina Rodríguez, Ana Carolina Rodríguez, William P. Leeman   +6 more
doaj   +1 more source