| 大别山两期镁铁质-超镁铁质岩特征及成因讨论 |
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| 引用本文： | 钱存超,路玉林,刘丽利,李运怀. 大别山两期镁铁质-超镁铁质岩特征及成因讨论[J]. 资源调查与环境, 2001, 22(4): 269-277 |
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| 作者姓名： | 钱存超 路玉林 刘丽利 李运怀 |
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| 作者单位： | 安徽省地质调查院, |
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| 基金项目： | 地质行业发展基金项目(HY9798029)和安徽地矿局联合资助. |
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| 摘 要： | 根据近期15万区调和科研成果,认为大别山镁铁质-超镁铁质岩可划分两期一期为前寒武纪变质镁铁质-超镁铁质岩,另一期为中生代未变质镁铁质-超镁铁质岩,前者由橄榄岩、橄辉岩、辉橄岩、榴辉岩、角闪石岩、斜长角闪岩等组成,原岩是由基性-超基性侵入岩或火山岩经过构造就位的;后者由辉石岩、辉闪岩、辉长岩、闪长岩组成,属于燕山期基性-超基性侵入岩,具有同源岩浆演化序列.通过对其岩石学、岩石化学、地球化学等详细研究表明,大别山目前还不存在蛇绿岩套,北大别榴辉岩及燕山期基性-超基性侵入岩的确定,为认识大别造山带的构造演化提供了重要基础资料.
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| 关 键 词： | 超基性岩 榴辉石 蛇绿岩套 大别山 |
| 文章编号： | 1003-9414(2001)04-0269-09 |
| 修稿时间： | 2001-01-12 |
Characteristics and genesis of the two terms mafic- ultramafic rocks in the Dabieshan |
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| QIAN Cun-chao,LU Yu-lin,LIU Li-li,LI Yun-huai. Characteristics and genesis of the two terms mafic- ultramafic rocks in the Dabieshan[J]. Resources Survey & Environment, 2001, 22(4): 269-277 |
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| Authors: | QIAN Cun-chao LU Yu-lin LIU Li-li LI Yun-huai |
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| Affiliation: | Anhui Academy of Geological Survey Hefei 230001 |
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| Abstract: | According to recent 1:50000 geological mapping and scientific research, mafic-ultramafic rocks of the Dabieshan can be classified into two terms: One is metamorphosed in Precambrian, the other is unmetamorphosed in Mesozoic. The former consists of peridotite ,eclogite, homblende rock, plagioclase amphibolite etc and the protoliths are mafic-ultramafic intrusire rocks or volcanic rocks by structure reached. The latter is composed of pyroxentie, gabbro, diorite etc, belonging to Yanshan period mafic-ultramafic intrusive rocks, cognate magam evolvution sequence .The petrology, petrochemical, geochemistry study of them indicates that there exists no ophiolite. The determination of eclogite and Yanshan period mafic-ultramafic intrusive rock of the north in the Dabieshan provided important geological basic data for recognizing structual evolvution of the Dabie orogeny . |
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| Keywords: | mafic-ultramafic rock eclogite ophiolite Dabieshan |
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