广东长坑金银矿床氧同位素组成特征及矿床成因讨论

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Composition of Oxygen Isotopes and Discussion on the Formation of Changkeng Au-Ag Deposit, Guangdong Province

ZHUANG Wen-ming, CHEN Guo-neng, LIN Xiao-ming, PENG Zhuo-lun, MA Hao-ming

Department of Earth Sciences, Sun Yatsen University, Guangzhou 510275, China

Received:2005-12-01 Revised:1900-01-01 Online:2006-07-26 Published:2006-07-26
Contact: ZHUANG Wen-ming

Abstract

Abstract: Oxygen isotope analyses of the samples collected systemically from six bores of the 16th prospecting line of Changkeng goldsilver deposit indicate that the δ¹⁸O values of rock increase from the deeper silver ore body to the shallower gold ore body and from the center of ore body to the wall rock, which consistent with the decreasing of alteration intensity of the wall rocks. Combining with the zoning characteristics of the oreforming elements clarified by the insitu melting hypothesis of granite formation in recent years, it is suggested that the Changkeng deposit should be a hydrothermal deposit, the hydrothermal fluids likely came from the concealed granite in the southern part of the region, and it is possible to find out lead, zinc and copper deposits below the silver ore body.

Key words: Changkeng goldsilver deposit, oxygen isotopes, wall rock alteration, oreforming fluid,  insitu melting model of granite

CLC Number:

P618.51

ZHUANG Wen-ming, CHEN Guo-neng, LIN Xiao-ming, PENG Zhuo-lun, MA Hao-ming. Composition of Oxygen Isotopes and Discussion on the Formation of Changkeng Au-Ag Deposit, Guangdong Province[J].J4, 2006, 36(04): 521-526.

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