Advances in Earth Science ›› 2004, Vol. 19 ›› Issue (2): 260-267. doi: 10.11867/j.issn.1001-8166.2004.02.0260
• Articles • Previous Articles Next Articles
ZHAI Wei 1,2, LI Zhaolin 1, HUANG Donglin 3
Received:
Revised:
Online:
Published:
ZHAI Wei, LI Zhaolin, HUANG Donglin. PROGRESS ON RESEACH OF OREFORMING 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.