Results 41 to 50 of about 806 (206)

Petrology and Geochemistry of the Aroud Granitoid Pluton, North of Alam Kuh, Central Western Alborz [PDF]

پترولوژی
IntroductionThe central Alborz, a tectono-stratigraphic terrane within the Alborz Mountains, underwent significant tectonic evolution linked to the Late Triassic Cimmerian orogeny and the subsequent collision between the Iranian microplate and the ...
Shadi Noori KHeymehsari, Nematollah Rashidnejad Omran, Mohammadreza Ghorbani, Huai-jen yang   +3 more
doaj   +1 more source

Adakitic post-Miocene magmatism of Qaraie sub-volcanic dome, Mahneshan area (west of Zanjan)

Journal of Economic Geology
Qaraie sub-volcanic dome in the west of Zanjan is part of the Urumieh-Dokhtar magmatic arc in the Central Iran zone. Qaraie dome with columnar joints was intruded into the Upper Red Formation sequence and Kahrizbeik granitoid intrusion with Upper ...
Sajad Moseni Badalabadi, Mir Ali Asghar Mokhtari, Hossein Kouhestani   +2 more
doaj   +1 more source

Comparative study of big data of global adakites and mineralization-related granite in the Geza arc metallogenic belt, northwest Yunnan, Southwest China

Big Earth Data, 2018
The Geza arc is an important part of the Sanjiang tectono-magmatic belt and is a newly discovered copper polymetallic ore concentration area in northwest Yunnan province, Southwest China.
Liu Xuelong, Li Wenchang, Zhang Qi, Zhang Na, Zhang Changzhen, Luo Ying, Wang Shuaishuai, Yang Fucheng, Chen Jianhang, Li Zhenhuan   +9 more
doaj   +1 more source

Isotope-geochemical heterogeneity of pliocene-quaternary volcanics from kamchatka and the asthenospheric diapirism problem

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2020
Isotope-geochemical material for Pliocene-Quaternary volcanoes of the Kamchatka region is generalized on a cartographic basis. The Sr-isotope anomalies of moderate and elevated radiogenicity, geochemically confirmed, are spatially conjugated.
Колосков А.В.
doaj   +1 more source

Structural Heterogeneity Shapes Segmentation of Megathrust Earthquakes and Volcanism in Central America

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The mechanisms underlying the patchy distribution of forearc megathrust earthquakes and arc volcanoes in subduction zones remain poorly understood. Here we present a high‐resolution seismic tomographic model of the Central American subduction zone, derived from a joint inversion of local body‐wave and teleseismic Rayleigh‐wave data.
Junhao Zhang, Xin Liu, Dapeng Zhao, Yibo Zang   +3 more
wiley   +1 more source

Late Cretaceous adakitic intrusive rocks in the Laimailang area, Gangdese batholith: Implications for the Neo-Tethyan Ocean subduction

Open Geosciences, 2022
The Gangdese batholith, emplaced from the Cretaceous to the Eocene in the southern Lhasa terrane of Tibet, provides critical constraints on the tectonic-magmatic evolution of the Neo-Tethyan Ocean and the India-Asia continental collision. In this article,
Li Deliang, Mai Yuanjun, Yang Wenguang, Zhu Lidong   +3 more
doaj   +1 more source

Petrogenesis and Tectonic Implication of the Newly Identified Rhyacian and Orosirian Orthogneisses in the Northwestern Part of the Gyeonggi Massif (Soyeonpyeongdo and Ganghwado Areas), South Korea: Constrained From Whole‐Rock Geochemistry and Zircon U‐Pb‐Hf Isotopic Compositions

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract The Gyeonggi Massif is one of the major Precambrian basements in the Korean Peninsula where Paleoproterozoic orthogneiss and paragneiss were widely exposed. In this study, newly identified Rhyacian to Orosirian meta‐igneous rocks from the northwestern Gyeonggi Massif (Soyeonpyeongdo and Ganghwado areas) were investigated to elucidate their ...
Seung Hwan Lee, Deung‐Lyong Cho, Jeong‐Yeong Park, Sung Won Kim, Byung Choon Lee, Mingguo Zhai   +5 more
wiley   +1 more source

Petrogenesis and Tectonic Evolution of Cenozoic Magmatism in the Southernmost Northern Andes: Insights From Zircon Petrochronology

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract This study integrates new zircon U–Pb ages, zircon εHf(t)–δ18O isotopic data, and whole‐rock geochemistry to refine the temporal and spatial framework of magmatism in the southern Northern Andes (SNA) from ∼65 to 6 Ma. The San Lucas, Catamayo, Portachuela, and Gonzanamá batholiths and magmatic suites, along with Late Miocene plutons, display ...
J. Iglesias, C. Witt, L. C. Sandoval Espinel, M. Zattin, M. Poujol, O. Bruguier, O. Poma, M. J. Hernández, O. Averbuch, M. Seyler, D. Bosch, F. Chanier, S. Ventalon, C. Liorzou, V. Bosse   +14 more
wiley   +1 more source

Adakite-like granitoid porphyries in the Eastern Pontides, NE Turkey: Potential parental melts and geodynamic implications

, 2011
The tectonic setting of the Eastern Pontides during the late Mesozoic to early Cenozoic remains a subject of debate. Petrogenesis of adakite-like granitoid porphyries plays a critical role in determining the nature of the lower continental crust and ...
Wijbrans, Jan, Aydin, F., Aydin, Faruk, Ketenci, Murat, Jan Wijbrans, Karsli, O., Abdurrahman Dokuz, Chen, Bin, Murat Ketenci, Kandemir, R., Wijbrans, J.R., İbrahim Uysal, Raif Kandemir, Ketenci, M., Uysal, I., Karsli, Orhan, Dokuz, Abdurrahman, Bin Chen, Kandemir, Raif, Uysal, Ibrahim, Dokuz, A., Chen, B., Orhan Karsli, Faruk Aydin   +23 more
core   +1 more source

Poikilitic hornblende pyroxenite in the southern end of the Abukuma Mountains, Northeast Japan, as result of adakitic magmatism

Frontiers in Geochemistry
Amphibole plays a pivotal role in mediating the flux of volatiles and partial melting that ultimately contribute to arc magmatism. The influence of amphibole from the lower crust to the upper mantle remains unclear due to limited opportunities for ...
Akira Wakazono, Mayuko Fukuyama, Keita Itano, Yumiko Harigane, Akihiro Tamura, Tomoaki Morishita, Tomoaki Morishita   +6 more
doaj   +1 more source