| 长江中下游中生代岩浆岩及铜铁成矿带的深部构造背景 |
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| 引用本文： | 李曙光.长江中下游中生代岩浆岩及铜铁成矿带的深部构造背景[J].安徽地质,2001,11(2):118-122. |
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| 作者姓名： | 李曙光 |
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| 作者单位： | 中国科学技术大学地球和空间科学系,安徽,合肥,230026 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);G1999075503; |
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| 摘 要： | 地球物理和中、新生代幔源岩浆岩同位素地球化学研究表明华北和华南陆块的深部岩石圈地缝合线较地表地缝合线南移。在郯庐断裂带以东南移至南京一镇江一线，并从南京往西呈南西走向延伸至桐城一带；在郯庐断裂带以西的大剐山区，深部地缝合线至少南移至岳西以南。这一贴近长江中下游的深部地缝合线，有可能在郯庐断裂系早白垩世发生大规模左行走滑作用下而导致引张，从而诱发了地幔上隆和大规模岩浆事件及铜铁成矿作用。
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| 关 键 词： | 长江中下游成矿带 华北和华南陆块碰撞带 中国东部中生代地幔 Nd同位素 |
| 文章编号： | 1005-6157(2001)02-0118-05 |
| 修稿时间： | 2001年5月3日 |
INFRASTRUCTURE OF MESOZOIC MAGMATIC ROCKS AND COPPER- IRON METALLOGENIC BELT IN THE MIDDLE AND LOWER YANGTZE RIVER REACHES |
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| LI Shu-guang.INFRASTRUCTURE OF MESOZOIC MAGMATIC ROCKS AND COPPER- IRON METALLOGENIC BELT IN THE MIDDLE AND LOWER YANGTZE RIVER REACHES[J].Geology of Anhui,2001,11(2):118-122. |
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| Authors: | LI Shu-guang |
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| Abstract: | It is indicated by geophysics, and isotope geochemistry of Mesozoic and Cenozoic mantle-sourced magmatic rocks that deep- seated lithospheric suture between the North China and South China cratons displaced southward compared with the surface suture. To east of the Tanlu Fault it moved southward to around Nanjing and Zhenjiang and was shown as SW- trending from Nanjing to around Tongcheng; In the Dabieshan area west of the Fault it moved southward at least to south of Yuexi. Close to the middle and lower Yangtze River reaches the southward displacement of the deep- seated suture was possibly resulted from large left-handed strike- slip event of the Tanlu Fault system during early Cretaceous and induced mantle upwelling including widespread magmatism and copper-iron metalligenic process. |
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| Keywords: | metallogenic belt in the middle and lower Yangtze River reaches collisional belt between the North China and South China cratons Mesozoic mantle of East China Nd isotope |
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