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Geology, Mineralization, Fluid Inclusion and Stable Isotope of the Early Cretaceous Sn and Associated Metal Deposits in the Southern Great Xing'an Range, NE China: A Review
Author(s) -
WANG Chengyang,
LIU Guanghu,
SUN Zhenjun,
LIU Jie,
LI Jianfeng,
LIANG Xinyang
Publication year - 2019
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 - 10.1111/1755-6724.14390
Subject(s) - geology , geochemistry , skarn , mineralization (soil science) , isotopes of oxygen , fluid inclusions , gangue , inclusion (mineral) , magmatic water , cretaceous , hydrothermal circulation , ore genesis , isotope geochemistry , δ34s , permian , mineralogy , isotope , paleontology , chemistry , structural basin , physics , quantum mechanics , soil science , soil water
The Southern Great Xing'an Range (SGXR) hosts a number of Early Cretaceous Sn and associated metal deposits, which can be divided into three principal types according to their geological characteristics: skarn type deposits, porphyry type deposits and hydrothermal vein type deposits. Fluid inclusion assemblages of different types of deposits are quite different, which represent the complexities of metallogenic process and formation mechanism. CH 4 and CO 2 have been detected in fluid inclusions from some of deposits, indicating that the ore‐forming fluids are affected by materials of Permian strata. Hydrogen and oxygen isotope data from ore minerals and associated gangue minerals indicate that the initial ore fluids were dominated by magmatic waters, some of which had clearly exchanged oxygen with wall rocks during their passage through the strata. The narrow range for the δ 34 S values presumably reflects the corresponding uniformity of the ore forming fluids, and these δ 34 S values have been interpreted to reflect magmatic sources for the sulfur. The comparation between lead isotope ratios of ore minerals and different geological units’ also reveals that deeply seated magma has been a significant source of lead in the ores.