Results 61 to 70 of about 859 (200)

Paleogene adakitic rhyolite to high-Mg andesites and Early Cretaceous adakitic zoned plutons in the Kitakami Mountains, Japan

The Journal of the Geological Society of Japan, 2008
花崗岩質大陸地殻の形成機構を明らかにすることは，地球の進化過程の解明に通じる重要な研究課題である．本案内書では，北上山地の前期白亜紀アダカイト質累帯深成岩体と古第三紀浄土ヶ浜流紋岩類の主要な岩体について，岩石学的特徴とその成因について述べた．これらのアダカイト類の岩石化学的多様性の成因には，スラブメルトとマントルおよび下部地殻との反応の程度の差が主要な役割を果たしていたと考えられ，スラブメルトの発生から上昇・定置に至る現象の解明に重要な位置を占めると考えられる．
Nobutaka Tsuchiya, Yoshiharu Nishioka, Shuhei Koiwa, Naoko Otsuki   +3 more
openaire   +2 more sources

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

The late Neoproterozoic Enganepe ophiolite, Polar Urals, Russia: An extension of the Cadomian arc?

, 2001
The Enganepe ophiolite, Polar Urals was formed at similar to 670 Ma and records a diverse geochemical association of tholeiite, arc-tholeiite, adakite, and GIB-like lithologies.
Dushin, V, Pease, V, Scarrow, JH,, Fleutelot, C   +3 more
core   +7 more sources

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

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

Adakite-like magmas from fractional crystallization and melting-assimilation of mafic lower crust (Eocene Macuchi arc, Western Cordillera, Ecuador)

, 2009
The basement of the Western Cordillera of Ecuador consists of a fragment of oceanic plateau crust (Pallatanga) accreted to the continental margin during the Late Cretaceous.
Chiaradia, Massimo, Massimo Chiaradia
core   +1 more source

Genesis of adakite-like lavas of Licancabur volcano (Chile-Bolivia, Central Andes) [PDF]

, 2009
The Licancabur volcano is located on the Bolivia-Chile Altiplano (Central Andes). The lavas are andesites and dacites. Numerous mineralogic features attest that magma mixing occurred.
Bernard Déruelle, Figueroa, Oscar, Demaiffe, Daniel, Déruelle, Bernard, Oscar Figueroa, Daniel Demaiffe   +5 more
core   +1 more source

Petrography, Petrology, and Geochemistry of Subvolcanic Bodies in Dogan Porphyry Copper-Molybdenum Deposit (Toroud-Chah Shirin Belt) [PDF]

پترولوژی
IntroductionDogan mining area is located on the northern edge of Iran's central desert plain and northwest of Toroud village. Structurally, the area is a part of Central Alborz, Eastern Alborz, and Central Iran zones, which gave rise to the formation of ...
Shadi Sattari, Mohammadreza Hosseinzadeh, Mohsen Moayyed   +2 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

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