| 东秦岭丹凤群火山岩系及其包体地球化学研究 |
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| 引用本文： | 匡少平,张本仁.东秦岭丹凤群火山岩系及其包体地球化学研究[J].现代地质,1993,7(4):444-457. |
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| 作者姓名： | 匡少平 张本仁 |
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| 作者单位： | 中国地质大学 武汉
(匡少平),中国地质大学 武汉(张本仁) |
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| 摘 要： | 本文对东秦岭褶皱带中古生界丹凤群火山岩系及其包体进行了研究。从火山岩浆演化角度,指出丹凤群不是一套蛇绿混杂岩体,其主体火山岩为岛弧地幔在洋壳俯冲诱导下重熔形成A类岩浆演变所形成,并含有少量的洋壳物质在俯冲带中发生熔融形成B类岩浆的衍生产物。岛弧的地壳结构控制着两类岩浆的演化,它是造成丹凤群火山岩岩石系列、岩石组合、元素地球化学分布及分异在空间上差异的原因。
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| 关 键 词： | 岛孤 俯冲带 火山岩系包体 岩浆演化 东奏岭 丹凤群 |
GEOCHEMICAL RESEARCH ON VOLCANIC ROCKS AND ITS INCLUSIONS OF DANFENG GROUP IN EAST QINLING BELT |
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| Kuang Shaoping Zhang Benren.GEOCHEMICAL RESEARCH ON VOLCANIC ROCKS AND ITS INCLUSIONS OF DANFENG GROUP IN EAST QINLING BELT[J].Geoscience——Journal of Graduate School,China University of Geosciences,1993,7(4):444-457. |
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| Authors: | Kuang Shaoping Zhang Benren |
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| Abstract: | Danfeng Group is composed of a sedimentary--volcanic rock series in Palaeozoic tecton-
ic belt of East Qinling. The detall systematic geochemical research reveals that the host of
Danfeng Group is result of differentiation of " A Type" magma which was born in partial
melting of mantle under island arc, while the minority developed from " B Type" magma
which came into the lower degree partial melting (4%) of oceanic crust in subduction zone.
The crust structure of island arc intimately controlled the magmatic evolution. |
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| Keywords: | island arc subduction zone inclusion of volcanic rocks magmatic evolu-tion East Qinling Danfeng Group |
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