| 论内蒙古额仁陶盖银矿床成岩成矿模式 |
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| 关键词:silver deposit quartz porphyry geological and geochemical character diagenic-metallogenic model Inner Mongolia |
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| The Diagenic-metallogenic Model of the Erentaolegai Silver Deposit in Inner Mongolia |
| Through studying the geology and geochemistry of the depostit and the granite, it is clear that the Erentaolegai silver deposit is of subvolcanic hydrothermal genesis. The local area was marginally_subjected to the late Yanshanian orogeny. The fault which had exited revived, forming crust-mantle granite migma. The magma experienced crystallization differentiation,generating granite and quartz porphyry. The quartz porphyry was formed by violent granite magmatic crystallization differentiation, so and hence silver was abundent in late diagenetic stages and post-diagenetic ore solution. Quartz porphyry is the parent rock of the deposit. Meteoric water at the Earth's surface played an important role in the formation of the magma and the deposit: (1)It contributed to the fundamental rock partial melting; (2)It contributed to magmatic crystallization differentiation and the concentration of silver in the quartz porphyry magma; (3)It contributed to the formation of abundant ore solution. |
| CHEN Xiang.1999.The Diagenic-metallogenic Model of the Erentaolegai Silver Deposit in Inner Mongolia[J].Acta Geoscientica Sinica,20(4):418-427. |
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