In this report, it is proven through stable iso-topic geochronological study that for the Jurassic sedimen-tary rocks in the Dushan area of Anhui Province, the source materials derived from high-pressure and ultrahigh...In this report, it is proven through stable iso-topic geochronological study that for the Jurassic sedimen-tary rocks in the Dushan area of Anhui Province, the source materials derived from high-pressure and ultrahigh-pressure metamorphic rocks are the products of subduction and ex-humation of the Yangtze plate under the North China plate during the Triassic period. The cobble of high-pressure or ultrahigh-pressure metamorphic rock in the Fenghuangtai Formation of Hefei Basin has Rb-Sr isotopic isochron age of phengite, apatite and whole rock, 232.1±2.1 Ma (MSWD = 0.59). Plateau ages of 40Ar/39Ar age spectra of detrital phengites in the Sanjianpu and Fenghuangtai formations are concordant, and they are 216.5±0.6 Ma and 217.4±1.3 Ma, respectively.展开更多
Using the Sm-Nd and Rb-Sr isotopic dating method, this note makes an analysis of Yuli Pb, Zn and Ag deposits that lie in the west of Suzhou region. The minerogenetic age of Yuli skarn polymetallic ore deposit and its ...Using the Sm-Nd and Rb-Sr isotopic dating method, this note makes an analysis of Yuli Pb, Zn and Ag deposits that lie in the west of Suzhou region. The minerogenetic age of Yuli skarn polymetallic ore deposit and its source materials are studied on the basis of detailed geological and geochemical studies.展开更多
基金supported by the State Key Basic Research Development Program of China(Grant No.G1999075507)
文摘In this report, it is proven through stable iso-topic geochronological study that for the Jurassic sedimen-tary rocks in the Dushan area of Anhui Province, the source materials derived from high-pressure and ultrahigh-pressure metamorphic rocks are the products of subduction and ex-humation of the Yangtze plate under the North China plate during the Triassic period. The cobble of high-pressure or ultrahigh-pressure metamorphic rock in the Fenghuangtai Formation of Hefei Basin has Rb-Sr isotopic isochron age of phengite, apatite and whole rock, 232.1±2.1 Ma (MSWD = 0.59). Plateau ages of 40Ar/39Ar age spectra of detrital phengites in the Sanjianpu and Fenghuangtai formations are concordant, and they are 216.5±0.6 Ma and 217.4±1.3 Ma, respectively.
文摘Using the Sm-Nd and Rb-Sr isotopic dating method, this note makes an analysis of Yuli Pb, Zn and Ag deposits that lie in the west of Suzhou region. The minerogenetic age of Yuli skarn polymetallic ore deposit and its source materials are studied on the basis of detailed geological and geochemical studies.
