| 南安第斯中生代构造演化 |
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| 引用本文： | 任爱军,金庆民,荆福建,梁勇.南安第斯中生代构造演化[J].资源调查与环境,1993(4). |
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| 作者姓名： | 任爱军 金庆民 荆福建 梁勇 |
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| 作者单位： | 中国地质科学院南极研究中心
(任爱军，金庆民，荆福建)，中国地质科学院南极研究中心(梁勇) |
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| 摘 要： | 南安第斯中生代构造演化化以形成哈迪(Hardy}弧—洛卡斯维尔德斯(Rocas Verdes)盆体系为主要特征。当地出露的陶比发拉(Tobifera)组、陶凸哈(Tortuga)蛇绿杂岩、亚汗(Yahgan)组和哈迪组分别代表了残余陆缘弧、T型大洋中脊、弧后盆地和岛弧上发育的岩石组合。弧—盆演化过程中,地幔物质底辟上隆造成早期陆缘弧一分为二,其一西移,形成以之为根的新生火山岛弧;另一部分保存于大陆内部,成为形成于分裂陆缘弧内部的弧后盆地火成碎屑的主要源区。盆地形成中期,裂陷深度大,内部出现洋中脊,基性火成岩沿该洋中脊侵位喷发。
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| 关 键 词： | 弧—盆体系 构造演化 中生代 南安第斯 |
MESOZOIC TECTONIC EVOLUTION OF SOUTHERN ANDES |
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| Ren Aijun Jin Qingmin Jing Fujian Liang Yong.MESOZOIC TECTONIC EVOLUTION OF SOUTHERN ANDES[J].Resources Survey & Environment,1993(4). |
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| Authors: | Ren Aijun Jin Qingmin Jing Fujian Liang Yong |
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| Abstract: | The main event of Mesozoic tectonic evolution of southern Andes is the formation of Hardy Island-arc-Rocas Verdes back-arc basin system. Exposed there Tobifera Formation, Tortu-ga Ophilitic Complex. Yahgan Formation and Hardy Formation represent, respectively, assemblages formed in residual continental arc, T-type mid-oceanic ridge, back-arc basin and volcanic island -arc. During the evolution of arc -basin system, the diapiric uprise of Mantle materials gave rise to seperation of the early continental are, whose western part migrated westwards and became the base of the newly formed island-are; The other part remained inside continent and became one provenance of pyroclasts for assemblages occurred in the back-arc basin. Along with the evolution of back-arc basin, mid-oceanic ridge formed, basic igneous rocks intruded and erupted nearby. |
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| Keywords: | Arc-Basin system tectonic evolution Mesozoic southern Andes |
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