Role of subducting component and sub-arc mantle in arc petrogenesis: Andaman volcanic arc

Ray Dwijesh; Rajan S.; Ravindra Rasik

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Role of subducting component and sub-arc mantle in arc petrogenesis: Andaman volcanic arc

机译：俯冲分量和亚弧幔在弧成岩作用中的作用：安达曼火山弧

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Geochemical proxies, especially the trace element ratios of arc lavas from Barren and Narcondam Islands of the Andaman-Nicobar Islands group, display dissimilar characteristics. Narcondam lavas (mostly andesitic) are typically characterized by high Ba/La, Ba/Nb and Th/Nd ratios, reflective of the imprint of substantial subduction component in the form of sediment fluid and melt. On the other hand, Barren lavas (mostly basaltic) show relatively high Ba/Th ratios, indicative of fluid-induced subduction component, mainly signature-inducing fluid component, derived from altered ocean crust.

机译：地球化学代理，特别是安达曼-尼科巴群岛组的Barren和Narcondam群岛的弧熔岩的痕量元素比率显示出不同的特征。 Narcondam熔岩（主要是安山岩）通常以高Ba / La，Ba / Nb和Th / Nd比为特征，反映出以泥沙流体和熔体形式存在的大量俯冲成分的印记。另一方面，贫瘠的熔岩（大部分为玄武质）显示出相对较高的Ba / Th比值，表明流体诱导的俯冲成分，主要是特征性诱导的流体成分，源于改变的海洋地壳。

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《Current Science: A Fortnightly Journal of Research》 |2012年第4期|共5页
作者
Ray Dwijesh; Rajan S.; Ravindra Rasik;
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正文语种 eng
中图分类自然科学现状及发展;
关键词
Arc lavas; petrogenesis; subduction component; trace element ratio;

机译：弧熔岩;成岩作用;俯冲成分;微量元素比;

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1. Role of subducting component and sub-arc mantle in arc petrogenesis: Andaman volcanic arc [J] . Ray Dwijesh, Rajan S., Ravindra Rasik Current Science: A Fortnightly Journal of Research . 2012,第4期

机译：俯冲分量和亚弧幔在弧成岩作用中的作用：安达曼火山弧
2. Volatile abundances in the sub-arc mantle: insights from volcanic and hydrothermal gas discharges [J] . Tobias P. Fischer, Bernard Marty Journal of Volcanology and Geothermal Research . 2005,第1a3期

机译：弧下地幔中的挥发性丰富物质：来自火山和热液气体排放的见解
3. Petrogenesis of Cenozoic, alkalic volcanic lineages at Mount Morning, West Antarctica and their entrained lithospheric mantle xenoliths: Lithospheric versus asthenospheric mantle sources [J] . Martin A.P., Cooper A.F., Price R.C. Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society . 2013,第Null期

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4. Gold, platinum and palladium enrichments in arcs: role of mantle wedge, arc crust and halogen-rich slab fluids [C] . Pavel Kepezhinskas, Nikita Kepezhinskas, Nikolai Berdnikov International Symposium on Water-Rock Interaction . 2019

机译：弧形中的金，铂金，钯富集：地幔楔，弧形和富含卤素的板坯的作用
5. Petrogenesis and provenance of volcanic clasts in the Upper Triassic Shinarump Member, Chinle Formation, and equivalents: Implications for Early Triassic Cordilleran arc magmatism [D] . Oberling, Zachary A. 2015

机译：上三叠世Shinarum火山碎屑的成因和物源，Chinle组及等价物：对早三叠世科迪勒勒弧岩浆作用的影响
6. Oxidising agents in sub-arc mantle melts link slab devolatilisation and arc magmas [O] . Antoine Bénard, Kevin Klimm, Alan B. Woodland, -1

机译：亚弧地幔熔体中的氧化剂链接了板坯的脱挥发分和电弧岩浆
7. Multiple mantle plume components involved in the petrogenesis of subduction-related lavas from the northern termination of the Tonga Arc and northern Lau Basin: Evidence from the geochemistry of arc and backarc submarine volcanics [O] . 2007

机译：汤加弧北端和劳盆地北部俯冲相关熔岩成因涉及的多个地幔柱成分：弧和后弧海底火山岩地球化学证据
8. Seamarc II Studies of Subducting Seamounts [R] . Fryer, P., Hussong, D. M. 1985

机译：seamarc II研究俯冲海山

Role of subducting component and sub-arc mantle in arc petrogenesis: Andaman volcanic arc

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