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| 祁连党河南山北坡中-基性火山岩地质特征及时代 | |
| 引用本文： | 李厚民,王崇礼,刘继庆,刘志武,沈远超.祁连党河南山北坡中-基性火山岩地质特征及时代[J].矿物岩石,2003,23(1):1-4. |
| 作者姓名： | 李厚民 王崇礼 刘继庆 刘志武 沈远超 |
| 作者单位： | 1. 中国地质大学(北京)地球科学与资源学院,北京,100083;长安大学,陕西,西安,710054 2. 长安大学,陕西,西安,710054 3. 中国科学院地质与地球物理研究所,北京,100029 |
| 基金项目： | “九五”国家科技攻关 3 0 5项目 (96-915 -0 6-0 1A)，国土资源部定向科研项目 (98-16) |
| 摘 要： | 根据地质研究、区域对比，结合首次获得的Rb-Sr等时线年龄数据，从祁连党河南山(又称乌兰达坂山）北坡原中奥陶统地层中厘定出晚震旦纪中－基性火山岩系。根据这一新成果，认为该区中基性火山岩，斜长角闪岩基底以及侵入其中的扎子沟等花岗闪长岩岩基在大地构造分区上应划归中祁连地块；晚震旦纪该区无疑有过扩张、地壳减薄的地质事件，震旦纪晚期有过挤压闭合事件。 |
| 关 键 词： | 晚震旦纪 中－基性火山岩 Rb－Sr等时线年龄 党河南 祁连 |
| 文章编号： | 1001-6872(2003)01-0001-04 |
| 修稿时间： | 2002年5月25日 |
GEOLOGICAL FEATURE AND CHRONOLOGY OF INTERMEDIATE- BASIC VOLCANIC ROCKS IN THE NORTHERN PART OF DANGHENANSHAN DISTRICTS IN QILIAN MOUNTAINS |
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| Abstract: | By geological study, regional correlation and our first Rb Sr isochronic dating, we suggest that the intermediate basic volcanic rocks which were before considered belonging to Ordovician in the northern part of Danghenanshan districts in Qilian Mountains, Gansu province, belong to late Sinian. On this basis, we suggest that these media base volcanic rocks belong to late Sinian, that the volcanic rocks and its basement(plagioamphibolite) and Zhazigou granodiorite bodies are in middle Qilian block, and that this district had undoubtful expanded and crustal thinned in late Sinian and extruded at the end of Sinian. |
| Keywords: | late Sinian intermediate basic volcanic rocks Rb Sr isochronic data Danghenanshan district Qilian mountains[FQ(3*2?42 X-W] ISSN 1001-6872(2003)01-0001-04 CODEN:KUYAE2 Synopsis of the first author: Li Houmin male 40 years old an associat |
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