| 大别山北大别杂岩的大地构造属性 |
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| 引用本文： | 江来利,胡礼军.大别山北大别杂岩的大地构造属性[J].现代地质,2000,14(1):29-36. |
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| 作者姓名： | 江来利 胡礼军 |
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| 作者单位： | 安徽省地质科学研究所!合肥230001(江来利，吴维平，刘贻灿，苏文)，合肥工业技术学校!合肥230051(胡礼军) |
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| 基金项目： | 国家自然科学基金!(项目号 :495 72 15 0、 497940 41)，安徽省地质矿产局共同资助 |
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| 摘 要： | 北大别杂岩主要由花岗质片麻岩及斜长角闪岩组成 ,含有不同类型、大小不等的麻粒岩岩块和变质超镁铁质岩块 ,侵入有大量白垩纪花岗岩和辉石 -辉长岩类。其中的花岗质片麻岩、斜长角闪岩具有岛弧环境的岩石地球化学特征 ,代表拼贴于扬子陆块北缘的新元古代古岛弧。北大别杂岩北可与庐镇关群相连 ,南俯于超高压变质岩之下 ,在三叠纪扬子陆块与华北陆块的碰撞过程中 ,曾与超高压变质岩一起俯冲到地幔深度并经受榴辉岩相变质作用 ,然后在折返过程中叠加了麻粒岩相及角闪岩相变质作用 ,是扬子陆块北缘陆壳俯冲基底的一部分
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| 关 键 词： | 大别山 北大别杂岩 新元古代 古岛弧 |
TECTONIC SETTING OF THE NORTH DABIE COMPLEX IN THE DABIE MOUNTAINS |
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| Jiang Laili,Wu Weiping,Hu Lijun,Liu Yican,Su Wen.TECTONIC SETTING OF THE NORTH DABIE COMPLEX IN THE DABIE MOUNTAINS[J].Geoscience——Journal of Graduate School,China University of Geosciences,2000,14(1):29-36. |
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| Authors: | Jiang Laili Wu Weiping Hu Lijun Liu Yican Su Wen |
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| Institution: | Jiang Laili 1) Wu Weiping 1) Hu Lijun 2) Liu Yican 1) Su Wen 1) |
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| Abstract: | The North Dabie Complex is mainly composed of granitic gneiss,amphibolite with lots of different kinds and different sizes of granulite blocks and mate ultramafic blocks,which were intruded by massive Cretaceous granite and gabbro pyroxinite.The granitic gneiss and amphibolite formed at new Proterozoic with island arc geochemical features,represent a Late Proterozoic island arc.The North Dabie Complex can extend to the Luzhenguan Formation in the North Huaiyang belt to north and underlay the UHP metamorphic rocks to south.The North Dabie Complex subduct to the mantle depth and suffered the eclogite facies metamorphism together with the UHP metamorphic rocks in the Early Triassic collision between the Yangtze and North China continental blocks,and then overprinted by granulite facies and amphibolite facies retrogression during their exhumation,therefore the North Dabie Complex is a part of the subduct continental crust basement on the north margin of the Yangtze continental blocks. |
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| Keywords: | Dabie mountains the North Dabie Complex new Proterozoic ancient island arc |
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