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| ANALYSIS ON THE FORMATION OF PERLITE DEPOSITS IN NORTHEAST CHINA |
| JIN Yong-xin1, WU Bo2, DONG Jun1 |
1. Institute of Exploration, Liaoning Bureau of Nonferrous Geology, Shenyang 110013;
2. No. 519 Team, North China Bureau of Geological Survey, Baoding 071051, Hebei Province, China |
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Abstract The perlite deposits in Northeast China are distributed mainly in Mesozoic continental basins. The ore-bearing horizon mostly lies in the early Mesozoic acid-intermediate volcanic rocks, with orebodies as quasi-strata trending NNE. The deposits belong to marginal island arc type, formed with the sudden drop of temperature and pressure when large amount of volatile component released from the acid magma. The ore-searching might be directed to the Mesozoic acid volcanic rocks, especially the newly-formed volcanic basins with NNE extension. The bulb-shaped rhyolite, vesicular rhyolite and tuff, which are closely associated with perlite, all serve as good prospecting indicators.
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Received: 06 April 2010
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2010, Vol. 19 
