The golden transformation of the Cretaceous plate subduction in the west Pacific

Sun, Weidong; Ding, Xing; Hu, Yanhua; Li, Xian‐Hua

doi:10.1016/j.epsl.2007.08.021

Cited by 700 publications

(365 citation statements)

References 71 publications

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“…24 Myr ago; this study). Furthermore, because the completion of the pyroxene-garnet transformation within the MTZ will take B100 Myr ago 41 , the age of the stagnant Pacific slab is inferred to be B125 Myr ago, consistent with previous estimates 52 . Our study therefore leads to the proposition that a MTZ water-filtering model may have controlled water in the MTZ via stagnation of the Pacific oceanic plate.…”

Section: Hydration Of the Mtz By Stagnant Pacific Slab Central-eastsupporting

confidence: 85%

“…Initial subduction of the Pacific oceanic plate under this part of Asia was inferred to take place at 130 À 120 Myr ago by integrating the drift history of the Pacific plate with tectonic evolution and gold mineralization in eastern China 52 . Combining the temporal distribution of volcanism and calculating the cumulative amount of total subduction within the MTZ with geophysical tomography in this region shows that collapse of stagnant slabs may have started about 25 Myr ago 12 , which coincides with the onset of eruption of the Chifeng CFBs (ca.…”

Section: Hydration Of the Mtz By Stagnant Pacific Slab Central-eastmentioning

confidence: 99%

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Continental flood basalts derived from the hydrous mantle transition zone

et al. 2015

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Section: Hydration Of the Mtz By Stagnant Pacific Slab Central-eastsupporting

confidence: 85%

Section: Hydration Of the Mtz By Stagnant Pacific Slab Central-eastmentioning

confidence: 99%

Continental flood basalts derived from the hydrous mantle transition zone

et al. 2015

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“…이를 유발한 원동력에 관한 모델 역시 다양하다. 요약하면 맨틀 플룸(plume) (Wilde et al, 2003;Deng et al, 2005), 인도판과 유라시아판의 충돌 (Menzies et al, 1993), 북중국지괴와 남중국지 괴의 충돌 (Menzies and Xu, 1998;Gao et al, 2002;Xu et al, 2006) 및 태평양판의 섭입 (Griffin et al, 1998;Xu, 2001Xu, , 2014Wu et al, 2005;Sun et al, 2007;Zhang et al, 2009;Xu et al, 2013) 등으로 정리할 수 있다. 북중국지괴 동측에 분 포하는 광범위한 백악기초기 화성활동은 이러한 암석 권맨틀의 변화과정과 연계되어 있는 것으로 추정된다 Chen et al, 2004;Wu et al, 2005).…”

Section: 핵심어: 백악기초기 동중국 경상분지 현무암 암석권맨틀unclassified

Petrogenesis of Early Cretaceous Magmatism in Eastern China and the Gyeongsang Basin, Korean Peninsula

Choi¹

2016

The Journal of the Petrological Society of Korea

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핵심어: 백악기초기, 동중국, 경상분지, 현무암, 암석권맨틀Abstract: Geochemical characteristics of the Early Cretaceous igneous rocks from eastern China and the Gyeongsang Basin, Korean Peninsula has been summarized. They have wide range of lithological variation with extrusive picrite-basalt-andesite-trachyte-rhyolite and lamprophyre, and intrusive gabbro-dioritemonzonite-syenite-granite and diabase in eastern China, mostly belonging to the high-K calc-alkaline or shoshonitic series. The volcanic rocks intercalated with the Hayang Group sedimentary assemblages in the Gyeongsang basin are high-K to shoshonitic basaltic trachyandesites. The Early Cretaceous basaltic rocks studied mostly fall within the field of within-plate basalts on the Zr/Y-Zr and Nb-Zr-Y tectonic discrimination diagrams. On a Sr-Nd isotope correlation diagram, basaltic rocks from the North China block (NCB) and the continent-continent collision zone (CZ) between the North and South China blocks plot into the enriched lower right quadrant along the extension of the mantle array. The initial Pb(t) correlation. Meanwhile, the SCB basaltic

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“…8). The Baizhangyan deposit formed during an Early Cretaceous magmatic- hydrothermal event related to intraplate extensional magmatism, potentially associated with subduction of the Paleo-Pacific Plate (Maruyama et al, 1997;Li, 2000;Sun et al, 2007).…”

Section: Links Between W-mo Mineralization and Geodynamic Eventsmentioning

confidence: 99%

Two Periods of Skarn Mineralization in theBaizhangyanW–MoDeposit, SouthernAnhui Province, SoutheastChina: Evidence from ZirconU–Pband MolybdeniteRe–Osand Sulfur Isotope Data

Jiang

Xing

et al. 2015

Resource Geology

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The recently discovered Baizhangyan skarn-porphyry type W-Mo deposit in southern Anhui Province in SE China occurs near the Middle-Lower Yangtze Valley polymetallic metallogenic belt. The deposit is closely temporally-spatially associated with the Mesozoic Qingyang granitic complex composed of granodiorite, monzonitic granite, and alkaline granite. Orebodies of the deposit occur as horizons, veins, and lenses within the limestones of Sinian Lantian Formation contacting with buried fine-grained granite, and diorite dykes. There are two types of W mineralization: major skarn W-Mo mineralization and minor granite-hosted disseminated Mo mineralization. Among skarn mineralization, mineral assemblages and cross-cutting relationships within both skarn ores and intrusions reveal two distinct periods of mineralization, i.e. the first W-Au period related to the intrusion of diorite dykes, and the subsequent W-Mo period related to the intrusion of the fine-grained granite. In this paper, we report new zircon U-Pb and molybdenite Re-Os ages with the aim of constraining the relationships among the monzonitic granite, fine-grained granite, diorite dykes, and W mineralization. Zircons of the monzonitic granite, the fine-grained granite, and diorite dykes yield weighted mean U-Pb ages of 129.0 ± 1.2 Ma, 135.34 ± 0.92 Ma and 145.3 ± 1.7 Ma, respectively. Ten molybdenite Re-Os age determinations yield an isochron age of 136.9 ± 4.5 Ma and a weighted mean age of 135.0 ± 1.2 Ma. The molybdenites have δ 34 S values of 3.6‰-6.6‰ and their Re contents ranging from 7.23 ppm to 15.23 ppm. A second group of two molybdenite samples yield ages of 143.8 ± 2.1 and 146.3 ± 2.0 Ma, containing Re concentrations of 50.5-50.9 ppm, and with δ 34 S values of 1.6‰-4.8‰. The molybdenites from these two distinct groups of samples contain moderate concentrations of Re (7.23-50.48 ppm), suggesting that metals within the deposit have a mixed crust-mantle provenance. Field observation and new age and isotope data obtained in this study indicate that the first diorite dyke-related skarn W-Au mineralization took place in the Early Cretaceous peaking at 143.0-146.3 Ma, and was associated with a mixed crust-mantle system. The second fine-grained granite-related skarn W-Mo mineralization took place a little later at 135.0-136.9 Ma, and was crust-dominated. The fine-grained granite was not formed by fractionation of the Qingyang monzonitic Resource Geology Vol. 65,

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The golden transformation of the Cretaceous plate subduction in the west Pacific

Cited by 700 publications

References 71 publications

Continental flood basalts derived from the hydrous mantle transition zone

Continental flood basalts derived from the hydrous mantle transition zone

Petrogenesis of Early Cretaceous Magmatism in Eastern China and the Gyeongsang Basin, Korean Peninsula

Two Periods of Skarn Mineralization in theBaizhangyanW–MoDeposit, SouthernAnhui Province, SoutheastChina: Evidence from ZirconU–Pband MolybdeniteRe–Osand Sulfur Isotope Data

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