| 阿尔金地块南西缘钙碱性侵入岩带特征及其地质意义 |
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| 引用本文： | 马铁球,王先辉,孟德保.阿尔金地块南西缘钙碱性侵入岩带特征及其地质意义[J].湖南地质,2002(1). |
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| 作者姓名： | 马铁球 王先辉 孟德保 |
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| 作者单位： | 湖南省地质调查院基础地质调查所 湖南湘潭411100
(马铁球，王先辉)，湖南省地质调查院基础地质调查所 湖南湘潭411100(孟德保) |
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| 基金项目： | 1∶25万区调新疆且末县一级电站幅部分成果 |
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| 摘 要： | 阿尔金地块南西缘钙碱性侵入岩带由余个大小不等的花岗岩体组成,其岩石类型主10要有石英闪长岩、英云闪长岩、花岗闪长岩、二长花岗岩。对带内有代表性岩体的岩石矿物学、岩石化学、微量元素、稀土元素及同位素地球化学研究表明,其属钙碱性系列,具有同源岩浆演化特征,其形成环境为活动大陆边缘。花岗闪长岩全岩—等时线年龄为,确定为晚震RbSr575 Ma旦世产物。这一发现,对于深入研究阿尔金地块活动机制,再造震旦期造山过程有一定作用。
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| 关 键 词： | 阿尔金地块 侵入岩带 活动大陆边缘 晚震旦纪 |
CHARACTERISTIC AND GEOLOGY MEANING OF ALKALINE-CALCIUM INVADEROCK ZONE AT THE SW FRINGE OF ALTUN MASSIF |
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| MA Tie-qiu WANG Xian-huiMENG De-bao,.CHARACTERISTIC AND GEOLOGY MEANING OF ALKALINE-CALCIUM INVADEROCK ZONE AT THE SW FRINGE OF ALTUN MASSIF[J].Hunan Geology,2002(1). |
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| Authors: | MA Tie-qiu WANG Xian-huiMENG De-bao |
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| Abstract: | Alkaline calcium invade-rock zone at the SW fringe of Altun massif composed by 10 granites of different size, mainly including quartz diorite, tonalite, granodiorite, monzonitic granite. Investigation of rock mineralogy, rock chemistry, and geochemistry on trace element, rare earth elements and isotopes, indicates that they belongs to alkaline calcium series with the evolvement characteristic of the same magma origin in the environment of movable mainland fringe. As the isochrone age of Rb-Sr is 575 Ma, granodiorite was formed in late Sinian. This discover may help toinvestigate the movement mechanism of Altun massif deeply, and rebuild the process of orogenic movement of Sinian Period. |
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| Keywords: | The SW fringe of Altun massif Invade-rock zone Movable mainland fringe Late Sinian |
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