| 甘肃北山南带中段志留系的发现及地质意义 |
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| 引用本文： | 代文军, 龚全胜, 李海林, 梁明宏, 刘明强. 甘肃北山南带中段志留系的发现及地质意义[J]. 西北地质, 2002, 35(3): 42-47. |
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| 作者姓名： | 代文军 龚全胜 李海林 梁明宏 刘明强 |
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| 作者单位： | 甘肃省地勘局第三地质矿产勘查院, 甘肃 兰州 730050 |
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| 基金项目： | 中国地质调查局“甘肃马鬃山 -北山造山带及非史密斯地层区 1∶ 2 5万区域地质填图及方法研究”项目成果 (编号 :1996 130 0 0 10 10 ) |
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| 摘 要： | 通过1:25万马鬃山幅区调填图资料,对小草湖-窑洞梁一带的火山岩,从岩石组合、变质变形、火山系列等方面进行了进一步的研究。并据其岩石组合、变形与变质程度等特征进行区域对比及在窑洞梁基性火山岩中获Rb-Sr等时线年龄为417.24±19.29Ma和垒墩子东山侵入于该套火山岩中的碱长花岗岩的Rb-Sr等时线年龄为283Ma,将其时代置于志留纪。
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| 关 键 词： | 北山南带中段 造山带 志留纪 |
| 文章编号： | 1009-6248(2002)03-0042-06 |
| 收稿时间： | 2002-01-07 |
| 修稿时间： | 2002-01-07 |
Discovery of Silurian in middle section of south belt of Beishan mountain and its geological significance,Gansu |
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| DAI Wen-jun, GONG Quan-sheng, LI Hai-lin, LIANG Ming-hong, LIU Ming-qiang. Discovery of Silurian in middle section of south belt of Beishan mountain and its geological significance, Gansu[J]. Northwestern Geology, 2002, 35(3): 42-47. |
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| Authors: | DAI Wen jun GONG Quan sheng LI Hai lin LIANG Ming hong LIU Ming qiang |
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| Affiliation: | No.3 Institute of Geology and Mineral Exploration, Gansu Provincial Bureau of Geology and Mineral Exploration and Development, Lanzhou 730050, China |
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| Abstract: | The paper made more research on volcanic rock in Xiaocaohu-Yaodongliang area about rock association metamorphic trait and deformation intensity,volcanic sequence etc on the basis of mapping data of the 1:250000 Mazongshan sheet. And make a comparison of regions on the basis of rock association metamorphic trait and deformation intensity etc,and the whole-rock Rb-Srage of the Yaodongliang basic volcanic rock is in the range of 417.24±19.29 Ma,the alkali-feldspar granite which irrupted the basic volcanic rock and where Leidunzi eastern mountain is 238 Ma,so its age belongs to the Silurian. |
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| Keywords: | the middle section of south belt of Beishan mountain orogenic belt Silurian |
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