| 长江中下游成矿带区域构造格局的新认识 |
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| 引用本文： | 常印佛,李加好,宋传中.长江中下游成矿带区域构造格局的新认识[J].岩石学报,2019,35(12):3579-3591. |
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| 作者姓名： | 常印佛 李加好 宋传中 |
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| 作者单位： | 合肥工业大学资源与环境工程学院, 合肥 230009;安徽省自然资源厅, 合肥 230088,合肥工业大学资源与环境工程学院, 合肥 230009,合肥工业大学资源与环境工程学院, 合肥 230009 |
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| 基金项目： | 本文受国家重点研发计划项目（2016YFC0600206）、安徽省公益性地质项目（2016-g-4）、中国地质调查项目（DD20190043）和中央高校基本科研业务费专项资金资助（PA2019GDZC0093）资助. |
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| 摘 要： | 长江中下游成矿带作为我国重要的成矿带之一,矿产资源开发利用及区域地质研究历史悠久,成果丰硕。本文重点论述了长江中下游成矿带的构造格局和复合构造系统,探讨了董岭/埤城式基底与江南式基底的拼合时代,提出了南北对峙带的概念,明确了江南过渡带的内涵。主要认识有:(1)长江中下游成矿带平面构造格局为"一弧一线夹两喇叭"的形态;(2)董岭/埤城式基底与江南式基底的拼合时代介于Z_1与Z_2之间;(3)南北对峙带是"纲",控制了长江中下游成矿带的构造格局;(4)剪切阶段是"眼",区域上由"压扭"向"张扭"的转换过程中成岩成矿大爆发;(5)江南过渡带的南半部早期属于江南隆起,在印支期与下扬子地区一并发生褶皱,褶皱特征类似下扬子坳陷南缘而与江南隆起腹地不同,故划到长江中下游成矿带构造单元中。
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| 关 键 词： | 长江中下游成矿带 构造格局 江南过渡带 基底拼合 南北对峙带 |
| 收稿时间： | 2019/10/12 0:00:00 |
| 修稿时间： | 2019/11/6 0:00:00 |
The regional tectonic framework and some new understandings of the Middle-Lower Yangtze River Valley Metallogenic Belt |
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| CHANG YinFo,LI JiaHao and SONG ChuanZhong.The regional tectonic framework and some new understandings of the Middle-Lower Yangtze River Valley Metallogenic Belt[J].Acta Petrologica Sinica,2019,35(12):3579-3591. |
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| Authors: | CHANG YinFo LI JiaHao and SONG ChuanZhong |
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| Institution: | School of Resources and Environment Engineering, Hefei University of Technology, Hefei 230009, China;Department of Natural and Resources of Anhui Province, Hefei 230088, China,School of Resources and Environment Engineering, Hefei University of Technology, Hefei 230009, China and School of Resources and Environment Engineering, Hefei University of Technology, Hefei 230009, China |
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| Abstract: | As one of the most important metallogenic belts in China, the Middle-Lower Yangtze River Valley Metallogenic Belt has experienced a long history of mining exploitation and regional geological research, and yielded fruitful achievements. In this paper, we discussed the tectonic framework, polygenetic compound tectonic system and timing of amalgamation between the Dongling/Picheng type basement and the Jiangnan type basement, proposed the concept of north-south confrontation zone, and defined the connotation of Jiangnan transition zone. The main understandings are as follows:(1) The planar tectonic framework of the Middle-Lower Yangtze River Valley Metallogenic Belt can be abstracted as "one arc and one line with two horns"; (2) The amalgamation between the Dongling/Picheng type basement with the Jiangnan type basement occurred between Z1 and Z2; (3) The north-south confrontation zone is the key, which controlled the tectonic framework of the Middle-Lower Yangtze River Valley Metallogenic Belt; (4) The shearing is the eye, where diagenetic and metallogenic explosion of the Middle-Lower Yangtze River Valley Metallogenic Belt was took place during the transition from regional transpression to transtension; (5) The southern half of the Jiangnan transition zone was part of the Jiangnan uplift in the early stage, and it was folded together with the Lower Yangtze area during the Indosinian. The fold type of this area was similar to the southern margin of the Lower Yangtze depression, but different from the hinterland of the Jiangnan uplift. Therefore, it is classified as tectonic units in the Middle-Lower Yangtze River Valley Metallogenic Belt. |
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| Keywords: | The Middle-Lower Yangtze River Valley Metallogenic Belt Tectonic framework Jiangnan transition zone Basement amalgamation The north-south confrontation zone |
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