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The Coupling Relationship Between Sandstone Type Uranium Mineralization and Sedimentary tectonic Evolution in the South Margin of Yili Basin---Evidence from Apatite Fission Track
Pages: 206-212
Year: Issue:  z1
Journal: Uranium Geology

Keyword:  fission trackthe south margin of Yili basinbasin mountain couplingmineralization;
Abstract: Study of mountain basin coupling is an important part of continental dynamics research.This paper mainly presented the analyses results of apatite fission track both from western Tianshan range and the Yili basin to reveal the up roofing history of the western Tianshan and to explore the control effect of mountain basin coupling to mineralization.25 samples, including granite, volcanics, sandstones from middle western Tianshan,Chabuchaer mountain and the drilling wells in southern part of the Yili basin were collected,and apatite was selected for fission track dating in the lab.Temperature time modeling of apatite was also completed based on data measurements of fission track length and age.Analyses results revealed that the western Tianshan has probably experienced four phases of rapid cooling events during the Mesozoic to Cenozoic, i.e.from Late Triassic to Early Jurassic (220 ~180Ma),Middle Jurassic (1 70 ~ 140Ma ), Middle Cretaceous (1 10 ~ 80Ma ), and Late Cenozoic (since 24 Ma).Combined with regional data analysis,basin sedimentary tectonic evolution process, and basin sandstone type uranium mineralization stage research,samples test results in basin drilling revealed that sedimentary tectonic evolution and sandstone type uranium mineralization of Yili basin have good coupling relationship with tectonic uplift and denudation processes of western Tianshan.
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