| 措勤盆地林子宗群火山岩地球化学特征 |
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| 引用本文： | 宋全友.措勤盆地林子宗群火山岩地球化学特征[J].地质力学学报,1999,5(2):65-70. |
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| 作者姓名： | 宋全友 |
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| 作者单位： | 石油大学资源科学系,山东,东营,257062 |
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| 基金项目： | 中国石油天然气集团公司资助项目;1996; |
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| 摘 要： | 青藏高原措勤盆地新生代火山活动十分强烈，以古近纪林子宗群火山岩为代表，主要分布在盆地中央隆起带的冈底斯构造岩浆岩带中，在北部坳陷带中仅有零星分布。林子宗群火山岩主要由安山岩、流纹岩、中酸性熔岩和火山碎屑岩组成。岩石化学研究表明属钙碱－高钾钙碱系列；岩石地球化学研究表明，木子宗群火山岩具岛弧火山岩特点，为喜马拉雅板片与冈底斯－念青唐古拉板片碰撞作用的产物。
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| 关 键 词： | 青藏高原 措勤盆地 火山岩 构造环境 |
| 收稿时间： | 1998/11/2 0:00:00 |
| 修稿时间： | 1998-11-02 |
GEOCHEMICAL FEATURES OF THE VOLCANIC ROCKS OF LINZIZONG GROUP IN CHUOQIN BASIN |
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| SONG Quanyou.GEOCHEMICAL FEATURES OF THE VOLCANIC ROCKS OF LINZIZONG GROUP IN CHUOQIN BASIN[J].Journal of Geomechanics,1999,5(2):65-70. |
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| Authors: | SONG Quanyou |
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| Institution: | Department of Petroleum Resources, University of Petroleum, Dongying Shandong 257062 |
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| Abstract: | Violent volcanic eruption occurred in the Chuoqin Basin of Qinghai-Tibetan Plateau during Cenozoic era, resulting in volcanic rocks consisting of andesite, rhyolite, intemediate-acid lava flow and pyroclastics known as the Linzizong Group which are distributed mainly in the Gangdise tectono-volcanic belt of the central uplift in the Chuoqin Basin but sparsely scattered in the north depression. Petrochemical study suggests the volcanics are of calc-alkalic to high potassium calc-alkalic suite; Geochemical study indicates that they are akin to the island are type formed by collision of the Himalayian plate with the Gangdis-Nianqing Tangula plate. |
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| Keywords: | Qinghai-Tibetan Plateau Cuoqin Basin Volcanic rock Tectonic setting |
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