| 华南西部地区晚中生代与W-Sn矿有关花岗岩的年代学格架及地质意义 |
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| 引用本文： | 程彦博,童祥,武俊德,莫国培.华南西部地区晚中生代与W-Sn矿有关花岗岩的年代学格架及地质意义[J].岩石学报,2010,26(3):809-818. |
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| 作者姓名： | 程彦博 童祥 武俊德 莫国培 |
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| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京,100083
2. 云南锡业集团,个旧,661000 |
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| 基金项目： | 国家自然科学基金重点项目(40930419)、国土资源部公益性行业科研专项(200911007)和云南锡业集团有限责任公司科研项目(2010-04A)联合资助 |
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| 摘 要： | 华南西部地区是我国重要的大型-超大型锡多金属矿床分布区。本文根据近年来新获得的花岗岩LA-ICP-MS锆石U-Pb数据,结合近几年以来新报道的高精度成岩成矿年代学资料和地球动力学研究进展,总结发现华南西部地区中生代岩浆-成矿作用的时代主要集中在晚白垩世(76～98Ma)。通过分别总结华南东、西部地区晚白垩岩浆作用及相应的成矿作用的特征,发现华南东、西部的成岩成矿作用特征表现出明显的差异,但是这两地内部各自却表现出高度的一致性;且东部地区明显要比西部地区更为复杂,但二者之间的共同点在于该时期均处于岩石圈伸展的环境和壳幔间的相互作用明显。晚白垩世华南西部地区主要受控于华南陆块陆内背景下岩石圈伸展而导致的岩浆-成矿作用这一因素,而东部地区除此之外还受到太平洋古板块北北东向走滑带来的影响。
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| 关 键 词： | W-Sn成矿作用 年代学格架 晚中生代 华南西部 |
| 收稿时间： | 2009/12/25 0:00:00 |
| 修稿时间： | 2/1/2010 12:00:00 AM |
Geochronology framework of the W-Sn mineralization granites in western South China and their geological significance |
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| Cheng YB,Tong X,Wu JD and Mo GP.Geochronology framework of the W-Sn mineralization granites in western South China and their geological significance[J].Acta Petrologica Sinica,2010,26(3):809-818. |
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| Authors: | Cheng YB Tong X Wu JD and Mo GP |
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| Institution: | Faculty of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;Yunnan Tin Group, Gejiu 661000, China;Yunnan Tin Group, Gejiu 661000, China;Yunnan Tin Group, Gejiu 661000, China |
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| Abstract: | Many important giant-supergiant tin polymetallic deposits distribute in the western South China block. Based on the new data and the latest reported highly precise dating of the ores and related granites and new progress in the study of geodynamic process, we propose that the timing of the large-scale Mesozoic magma-mineralization of western South China region mainly concentrated in Late Cretaceous (76~98Ma). Though a series of similar characters, such as lithosphere extensional environment, can be discovered in the eastern- and western-part of South China block, obvious differences also exist in these two regions; moreover, the eastern part shows a more complicate character. In Late Cretaceous, the western part mainly controlled by intraplate magmatism and mineralization, however, except for this aspect, the eastern part also influenced by the changing of moving direction of the subducted Izanagi plate. |
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| Keywords: | W-Sn mineralization Geochronological framework Late Mesozoic Western South China |
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