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- W2362810231 abstract "He-Ar isotopic compositions of fluid inclusions trapped in pyrites from some representa-tive PGE-polymetallic deposits in Lower Cambrian black rock series in Southern China were anal-ysed by using an inert gas isotopic mass spectrometer. The results show that the ore-forming fluidpossesses a low ~3He/~4He ratio, varying between 0.43×10~(-8) and 26.39×10~(-8), with an R/R_avalue of 0.003～0.189. The ~(40)Ar/~(36)Ar are 258～287, closing to that of air-saturated water(ASW). He-Ar isotopic indicator studies show that the ore-forming fluid was mainly composed offormation water or basinal hot brine and sea water, while the content of mantle fluid or deep-de-rived magmatic water might be neglected. The PGE-polymetallic mineralization might be relatedto evolution of Caledonian miogeosynclines distributed along southern margin of the South ChinaCraton. In the Early Cambrian Period, the formation water (basinal hot brine) trapped in theCaledonian basins where accumulated extremely thick sediments was expelled and migrated later-ally along strata because of the pressure generated by overlying sediments. The basinal hot brineascended along faults, mixed with sea water and finally deposited ore minerals." @default.
- W2362810231 created "2016-06-24" @default.
- W2362810231 creator A5088465554 @default.
- W2362810231 date "2003-01-01" @default.
- W2362810231 modified "2023-09-23" @default.
- W2362810231 title "He-Ar Isotopic Systematics of Fluid Inclusions in Pyrites from PGE-Polymetallic Deposits in Lower Cambrian Black Rock Series, Southern China" @default.
- W2362810231 hasPublicationYear "2003" @default.
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