| 大别山北部中酸性片麻岩的岩石地球化学特征及其古大地构造意义 |
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| 引用本文： | 刘贻灿,徐树桐,江来利,陈冠宝,吴维平,苏文.大别山北部中酸性片麻岩的岩石地球化学特征及其古大地构造意义[J].大地构造与成矿学,1999,23(3):222-229. |
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| 作者姓名： | 刘贻灿 徐树桐 江来利 陈冠宝 吴维平 苏文 |
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| 作者单位： | 1. 安徽省地质科学研究所,安徽,合肥230001;中国科学技术大学地球和空间科学系,安徽,合肥230026
2. 安徽省地质科学研究所,安徽,合肥230001 |
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| 摘 要： | 大别山北部变质镁铁－ 超镁铁质岩带中的中酸性片麻岩主要可分为三类：①英云闪长质片麻岩、②花岗闪长质片麻岩和③二长花岗质片麻岩，其原岩属于一套钙碱性的中酸性花岗岩系列。岩石地球化学特征表明，它们分别形成于板块碰撞前消减地区（ 消减的活动板块边缘） 、板块碰撞后隆起花岗石区和同碰撞花岗岩区。其中，形成于８００ ～１０００ Ｍａ 左右的英云闪长质片麻岩经受过麻粒岩相变质作用并与该带中属于蛇绿岩成员的变基性熔岩有亲缘关系， 可能属于蛇绿岩中的浅色组分。
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| 关 键 词： | 中酸性片麻岩 岩石地球化学 大地构造意义 大别山北部 |
| 文章编号： | 1001－1552（1999）03－0222－08 |
PETROLOGIC GEOCHEMICAL CHARACTERISTICS AND PALEO-TECTONIC SIGNIFICANCE OF THE INTER MEDIATE-ACID GNEISSES FROM THE METAMOR PHOSEDMAFIC-ULTRAMAFIC BELT IN THE NORTHERN DABIE MOUNTAINS |
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| LIU Yi-can,XU Shu-tong,JIANG Lai-li,CHEN Guan-bao,WU Wei-ping,SU Wen.PETROLOGIC GEOCHEMICAL CHARACTERISTICS AND PALEO-TECTONIC SIGNIFICANCE OF THE INTER MEDIATE-ACID GNEISSES FROM THE METAMOR PHOSEDMAFIC-ULTRAMAFIC BELT IN THE NORTHERN DABIE MOUNTAINS[J].Geotectonica et Metallogenia,1999,23(3):222-229. |
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| Authors: | LIU Yi-can XU Shu-tong JIANG Lai-li CHEN Guan-bao WU Wei-ping SU Wen |
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| Abstract: | The intermediate-acid gneisses from the metamorphosed mafic-ultramafic belt in the northern Dabie Mts.can be classified into three types:①tonalitic gneiss,②granodioritic gneiss and ③monzonitic granitic gneiss.Their protolith belong to a series of calcic-alkaline intermediate-acid granitoid.Their petrologic geochemical characteristics indicate they formed in the pre-plate collision(subducting active plate edge),post-collision uplift and syn-collision stages separately.The tonalitic gneiss of them formed in ca 800～1000 Ma,is related to the meta-basic lava with ophiolite geochemical characters and belongs to the leuco component of the meta-ophiolite. |
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| Keywords: | intermediate-acid gneiss petrologic geochemistry tectonic significance northern Dabie Mountains |
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