内蒙古东升庙、甲生盘中元古代SEDEX矿床同生断裂活动及其控矿特征

彭润民; 翟裕生; 王志刚

Volume 25 Issue 4

Jul. 2000

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Article Navigation > Earth Science > 2000 > 25(4): 404-409

PENG Runmin, ZHAI Yusheng, WANG Zhigang, 2000. ORE-CONTROLLING SYNCHRONOUS FAULTS OF MESOPROTEROZOIC DONGSHENGMIAO AND JIASHENGPAN SEDEX-TYPE ORE DEPOSITS, INNER MONGOLIA. Earth Science, 25(4): 404-409.

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ORE-CONTROLLING SYNCHRONOUS FAULTS OF MESOPROTEROZOIC DONGSHENGMIAO AND JIASHENGPAN SEDEX-TYPE ORE DEPOSITS, INNER MONGOLIA

1.
Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China
2.
Inner Mongolia Geological Prospecting Institute, Ministry of Chemical Industry, Hohhot 010074, China

Received Date: 2000-04-21
Publish Date: 2000-07-25

Abstract

Abstract

The Dongshengmiao Zn Pb Cu sulfide ore deposit hosted by the only ore bearing 2nd formation of the Mesoproterozoic Langshan Group and the Jiashengpan Zn Pb sulfide ore deposit hosted by the 2nd member of the Agulugou Formation of the Mesoproterozoic Zhaertai Group are both obviously strata bound and equivalent in their occurrence horizons. It is believed that the synchronous faulting occurred in the only ore bearing 2nd formation of Langshan Group and in the 2nd member of the Agulugou Formation, supported by the following evidences: (1) The sudden changes in lithofacies occurred in the ore bearing strata; (2) The thickness of the ore bearing strata suddenly varied along the strike and dipped with intraformational conglomerates, and olistolithes; (3) The Zn Pb Cu orebodies suddenly thickened and thinned or even wedged out; (4) In some Zn Pb, Zn Pb Cu and Zn Cu orebodies occurred the brecciated structure ores containing some blocks and fragments of dolomite marble, carbonaceous phyllite, quartzite, tuffs, granulites, metavolcanite, biotite schist and even Zn Pb or Py ores; (5) Some basic volcanic rocks and ruffs occurred in the linear distribution. The synchronous fault, favorable for the formation of the Dongshengmiao and Jiashengpan ore deposits, served as the path for both the volcanic eruption and the mineralized fluid exhaling into the ore bearing basins during the Mesoproterozoic. The variations in scale and history of the synchronous fault with different secondary depositional basins suggested the unevenness of the extensional processes resulting in the difference in the mineralization intensity and orebody distribution. The Dongshengmiao ore deposit had a longer history of synchronous fault than the Jiashengpan ore deposit. In this sense, the Dongshengmiao ore deposit is defined as the super large deposit, but the Jiashengpan ore deposit as the large one.
- intraformational conglomerates and olistolithes,
- synchronous fault,
- Dongshengmiao and Jiashengpan SEDEX type deposits,
- Mesoproterozoic,
- Inner Mongolia

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References(15)

References

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