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398 results on '"Mo, Xuanxue"'

1. Metallogenic Theory and Exploration Technology of Multi-Arc-Basin-Terrane Collision Orogeny in 'Sanjiang' Region, Southwest China

Author

Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, and Zhang, Xiangfei

Subjects
Multi-arc-basin-terrane, Prospecting Technique, Tectonic Evolution, Tethys, Nujiang-Lancangjiang-Jinshajiang, Metallogenesis, bic Book Industry Communication::R Earth sciences, geography, environment, planning::RB Earth sciences::RBG Geology & the lithosphere, bic Book Industry Communication::P Mathematics & science::PH Physics::PHV Applied physics::PHVG Geophysics, bic Book Industry Communication::T Technology, engineering, agriculture::TH Energy technology & engineering, bic Book Industry Communication::R Earth sciences, geography, environment, planning::RB Earth sciences::RBG Geology & the lithosphere::RBGK Geochemistry
Abstract

This open access book presents a new structural model of “multi-arc-basin-terrane system” based on the in-depth research of the Nujiang-Lancangjiang-Jinshajiang region, especially several Paleo-Tethys ophiolitic mélange belts and sets of arc-basin systems, and a new orogenic model of “The Hengduan shan Mountains” based on penetrated research on spatial-temporal framework and orogenic models of different orogenic belts under large-scale strike-slip-shear-nappe structures evolution. The authors paid special attention on the coupling relation between orogeny and metallogenesis. The metallogenesis and dynamic process are probed under the crust–mantle interaction and material-energy exchange-transmission background and the tectonic units evolution. The ore genesis and distribution of deposits have been thoroughly analyzed, and the metallogenic theories of "multi-arc-basin-terrane" and "intracontinental tectonic transformation" in the Nujiang-Lancangjiang-Jinshajiang region have been carried out. This book also illustrates how to explore metallic deposits in the Nujiang-Lancangjiang-Jinshajiang region by using the metallogenic regulations. Meanwhile, this book has high reference value for researchers working in the fields of basic geology, environmental geology, and energy geology.

Published
2023
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4. Regional Metallogenic Models

Author

Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, Zhang, Xiangfei, Li, Chenyang, Editor-in-Chief, Wu, Xuan, Series Editor, Zhang, Xiangyuan, Series Editor, Zhang, Lizhong, Series Editor, Gong, Qingjie, Series Editor, Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, and Zhang, Xiangfei

Published
2023
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6. Mineralization and Metallogenic System in Sanjiang Region

Author

Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, Zhang, Xiangfei, Li, Chenyang, Editor-in-Chief, Wu, Xuan, Series Editor, Zhang, Xiangyuan, Series Editor, Zhang, Lizhong, Series Editor, Gong, Qingjie, Series Editor, Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, and Zhang, Xiangfei

Published
2023
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7. Formation and Evolution of Sanjiang Collision Orogenic Belt

Author

Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, Zhang, Xiangfei, Li, Chenyang, Editor-in-Chief, Wu, Xuan, Series Editor, Zhang, Xiangyuan, Series Editor, Zhang, Lizhong, Series Editor, Gong, Qingjie, Series Editor, Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, and Zhang, Xiangfei

Published
2023
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9. Tectonic Framework of Sanjiang Tethyan Metallogenic Domain

Author

Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, Zhang, Xiangfei, Li, Chenyang, Editor-in-Chief, Wu, Xuan, Series Editor, Zhang, Xiangyuan, Series Editor, Zhang, Lizhong, Series Editor, Gong, Qingjie, Series Editor, Li, Wenchang, Pan, Guitang, Hou, Zengqian, Mo, Xuanxue, Wang, Liquan, and Zhang, Xiangfei

Published
2023
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27. Miocene Alkaline Basaltic Magmatism in Northeastern Tibetan Plateau: Implications for Mantle Evolution and Plateau Outward Growth.

Author

Che, Yue, Liu, Dong, Zhao, Zhidan, Niu, Yaoling, Teng, Fang‐Zhen, DePaolo, Donald J., Yu, Xuehui, Zhu, Di‐Cheng, Qi, Ningyuan, and Mo, Xuanxue

Subjects
SLABS (Structural geology), STRONTIUM isotopes, FLOOD basalts, SUTURE zones (Structural geology), BASALT, ADAKITE, METASOMATISM
Abstract

The widespread Cenozoic alkaline magmatism within and around the Tibetan Plateau offers a prime opportunity to probe the nature of the mantle at the depths where basalt magmas originate. The close temporal and spatial relationship between volcanism and regional strike‐slip fault systems also helps better understand the geodynamics of outward growth of the plateau in response to the continued India‐Asia convergence. We present a comprehensive study of the deeply sourced alkaline basalts formed along the Kunlun strike‐slip fault with the aim of understanding their petrogenesis and the composition of mantle sources beneath the northeastern Tibetan Plateau. High Nb/U and Ce/Pb ratios and relatively depleted bulk‐rock Sr‐Nd‐Pb isotope compositions corroborate the mantle origin of these alkaline basalts. Homogeneous and low 87Sr/86Sr of clinopyroxene indicates negligible crustal contamination during magmatic evolution. Low δ26Mg in the alkaline basalts and positive correlations with Hf/Sm and Ti/Ti* indicate that the basalts were derived from mantle that was metasomatized by melts derived from sedimentary carbonates during the Paleo‐Tethyan seafloor subduction. Based on 40Ar/39Ar dating results, it appears that the alkaline basaltic magmatism in the northeastern Tibetan Plateau occurred simultaneously with Kunlun strike‐slip faulting. These observations suggest that the India‐Asia convergence must have reactivated ancient subduction plate boundaries and resulted in strike‐slip faulting along these suture zones within and around the Tibetan Plateau. The eruption of low‐volume and deeply rooted alkaline basalts may have been controlled by fractures associated with the strike‐slip fault systems. Plain Language Summary: Small volcanoes that erupted basalt lava with alkaline compositions about 11.5 million years old occur along the northeast margin of the Tibetan Plateau and are close to a major fault system, the Kunlun Fault. Based on their chemical compositions, these basalts were melted from the upper mantle and provide information on the composition of the mantle beneath the plateau. Our chemical, geochronological, and isotopic analyses of the lava indicate that the sub‐plateau mantle was indeed affected by ancient oceanic slab subduction, including subduction of seafloor sediments that resulted in the addition of carbonate‐rich melts to the sub‐plateau mantle, making the mantle more susceptible to melting and more likely to produce alkaline basalt when it did melt. The age of the basalt lava overlaps the age of movement along the Kunlun fault, which suggests that the magma may have been produced from the same tectonic movements that produced the fault and risen through the crust along fractures associated with the fault. Key Points: The light Mg isotopes of the studied alkaline basalts highlight the occurrence of mantle carbonatite metasomatism via Paleo‐Tethyan oceanic slab subductionAlkaline basalts in northeastern Tibetan Plateau erupted coevally with Kunlun strike‐slip faulting that gave rise to mantle upwelling and decompression meltingLithospheric extrusion induced by India‐Asia collision reactivated pre‐existing lithospheric weakness and triggered mantle melting beneath the NE and SE plateau [ABSTRACT FROM AUTHOR]

Published
2024
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