Advances in Earth Science ›› 2004, Vol. 19 ›› Issue (2): 260-267. doi: 10.11867/j.issn.1001-8166.2004.02.0260

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PROGRESS ON RESEACH OF OREFORMING FLUID OF GOLD DEPOSITS RELATED TO SHEAR ZONES

ZHAI Wei 1,2, LI Zhaolin 1, HUANG Donglin 3   

  1.  1. Department of Earth Sciences, Zhongshan University, Guangzhou 510275, China; 2. State Key Laboratory for Mineral Deposit Research, Nanjing University, Nanjing 210093, China; 3. Hetai Gold Mine, Gaoyao, Guangdong Province, Gaoyao 261000, China
  • Received:2003-01-23 Revised:2003-05-14 Online:2004-12-20 Published:2004-04-01

ZHAI Wei, LI Zhaolin, HUANG Donglin. PROGRESS ON RESEACH OF OREFORMING FLUID OF GOLD DEPOSITS RELATED TO SHEAR ZONES[J]. Advances in Earth Science, 2004, 19(2): 260-267.

Gold deposits related to shear zones is one of the very important gold deposit types. The deposits are hosted in compressional to transpressional deformation environments at convergent plate margins in accretionary and collision orogens. These deposits formed from Archean to Tertiary, hosting complex wall-rocks, which was metamorphosed from low greenschist facies to granulite facies of metamorphic grade. The deposits had consistent enrichments in Au, Ag, As,Sb, W, Bi, Te, [WTBX]etc[WTBZ],The altered wall-rocks were characteristically rich in CO2、S、K、H2 O、SiO2. Ore-forming fluid is low salinity (3~10 wt%NaCl), near-neutral, enriched in CO2 (≥5mol%),δ18OH2 O=5‰~12‰. There are different viewpoints on the origin of ore-forming fluid, that is magmatic origin, mantle origin, meteoric water origin, metamorphic origin and mixed fluid origin. Much deeper research into these types of deposits is very important to metallogenic theory and explorations.

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