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Rb‐Sr Isotopic Age of Sphalerites from Qingchengzi Stratiform Pb‐Zn Ores and Its Implication for the Ore Forming Process
Author(s) -
MA Yubo,
XING Shuwen,
ZHANG Zengjie,
WANG Yan,
ZHANG Yong
Publication year - 2014
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 - 10.1111/1755-6724.12378_17
Subject(s) - metallogeny , beijing , mineral resource classification , mineral , geology , key (lock) , mining engineering , geochemistry , china , pyrite , archaeology , computer science , sphalerite , geography , chemistry , computer security , organic chemistry
The Qingchengzi orefield, situated in eastern Liaoning Province, northeastern China (123° 37'E, 40° 44'N), is an important region with clusters of Pb, Zn, and precious metal deposits. The orefield contains more than ten PbZn deposits and has a mining history of more than 400 years. Some precious metal (Ag, Au) deposits were recently found in the eastern part of the orefield. The orefield in which the Pb, Zn, Ag, and Au deposits are concentrated is also the location of magmatism of different ages, ranging from Proterozoic, Yindosinian (Triassic) and Yanshanian (Jurassic and Cretaceous). While much work on the origin of these deposits has been carried out, discrepancies as to the ages and the metal sources of the deposits remain (Zhang, 1984; Jiang, 1987; Ding et al., 1992; Liu and Ai, 2001; Xue et al., 2003). Many studies have shown that Rb-Sr dating of sulfide minerals, especially sphalerite and pyrite, can be used to determine the formation age of hydrothermal sulfide mineral deposits (Nakai et al., 1993; Christensen et al., 1995). In this study, we report the results of step-dissolution Rb-Sr dating of sphalerite from the stratiform Pb-Zn ores in Zhenzigou deposits and discuss its implication for the ore forming preocess.