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Basin Fluid Mineralization during Multistage Evolution of the Lanping Sedimentary Basin, Southwestern China
Author(s) -
Xuexiang GU,
Yongmei ZHANG,
Shuyi DONG,
Juxing TANG,
Chengshan WANG,
Jianping CHEN
Publication year - 2007
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.1755-6724.2007.tb01020.x
Subject(s) - geology , structural basin , sedimentary rock , paleozoic , sedimentary basin analysis , cretaceous , paleontology , sedimentary basin , foreland basin , rift , cenozoic , geochemistry , tectonics
The Lanping sedimentary basin has experienced a five‐stage evolution since the late Paleozoic: ocean‐continent transformation (late Paleozoic to early mid‐Triassic); intracontinental rift basin (late mid‐Triassic to early Jurassic); down‐warped basin (middle to late Jurassic); foreland basin (Cretaceous); and strike‐slip basin (Cenozoic). Three major genetic types of Ag‐Cu polymetallic ore deposits, including the reworked hydrothermal sedimentary, sedimentary‐hydrothermally reworked and hydrothermal vein types, are considered to be the products of basin fluid activity at specific sedimentary‐tectonic evolutionary stages. Tectonic differences of the different evolutionary stages resulted in considerable discrepancy in the mechanisms of formation‐transportation, migration direction and emplacement processes of the basin fluids, thus causing differences in mineralization styles as well as in genetic types of ore deposit.