Premium
The Bulong Gold Deposit—a Quartz‐Barite Vein Type Gold Deposit in Xinjiang: Geological Characteristics and S, He and Ar Isotopic Compositions
Author(s) -
Fuquan YANG,
Yitian WANG,
Jingwen MAO
Publication year - 2004
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2004.tb00147.x
Subject(s) - pyrite , geology , quartz , fluid inclusions , geochemistry , devonian , vein , crust , clastic rock , isotopes of argon , mineralogy , δ34s , meteoric water , argon , sedimentary rock , hydrothermal circulation , chemistry , psychology , paleontology , organic chemistry , psychiatry , seismology
The Bulong gold deposit, located in the southwest Tianshan in China, occurs in the Upper Devonian finegrained clastic rocks. The gold orebodies are controlled by an gently inclined interlayer fractured zone. They are hosted only in quartz‐barite veins though there are barite veins and quartz veins in the ore district. The δ 34 S values of pyrite in the ores range from 14.6‰ to 19.2‰ and those of barite from 35.0‰ to 39.6‰, indicating that the sulfur was derived from the strata. 3 He/ 4 He ratios of fluid inclusions in pyrite are 0.24–0.82 R/Ra, approximating to that of the crust. The 40 Ar/ 36 Ar ratios range from 338 to 471, slightly higher than that of the atmosphere. 40 Ar / 4 He ratios of ore fluids range from 0.015 to 0.412 with a mean of 0.153. Helium and argon isotope compositions of fluid inclusions show that the ore fluids of the Bulong gold deposit were mainly derived from the crust.