A geochronological and geochemical study on the granodiorite porphyry and its implication for the mineralization in the Dayaoshan metallogenic belt, Southeastern China

2020 ◽  
Author(s):  
Panfeng Liu ◽  
Jiali Zhang ◽  
Zhiqiang Wu ◽  
Qingwei Zhang ◽  
Meilan Wen ◽  
...  
Keyword(s):  
Southeastern China ◽  
Metallogenic Belt ◽  
Geochemical Study ◽  
Granodiorite Porphyry

Lead Isotope Geochemistry of the Jilongshan Skarn-Host Au-Cu Deposit, Hubei Province, China

2012 ◽  
Vol 468-471 ◽  
pp. 1952-1956
Author(s):  
Bao Jian Jia ◽  
Sheng Rong Li ◽  
A Juan Pang ◽  
Cheng Dong Yang ◽  
Yu Tong Yan
Keyword(s):  
Isotope Geochemistry ◽  
Single Stage ◽  
Stage Model ◽  
Material Source ◽  
Linear Distribution ◽  
Tectonic Model ◽  
Metallogenic Belt ◽  
Metallogenic Epoch ◽  
Granodiorite Porphyry ◽  
Made In

Jilongshan Au-Cu deposit is a typical skarn deposit in the southeastern Hubei metallographic province of the Middle-Lower Yangtze River Fe-Cu metallogenic belt. But little study of ore-forming material source has been made in Jilongshan Au-Cu deposit. Therefore, we discussed the ore-forming material source by analyzing 15 lead geochemistry samples collected in Jilongshan deposit. The ranges of the Pb isotopic compositions are from 17.358 to 18.589 for 206Pb/204Pb, 15.414 to 15.745 for 207Pb/204Pb and 37.956 to 39.094 for 208Pb/204Pb, which are anomalous and their single-stage model ages cannot be used as a criterion for metallogenic epoch. However, the distributing characteristics of the single-stage model ages suggest that the ore Pb have mixing sources. The linear distribution of Pb isotope in tectonic model diagram suggests that the consistent relation of granodiorite porphyry, skarn, marble and ore, which is also a good proof that the ore-forming materials are partly from magma.

scholarly journals Zircon U-Pb, Molybdenite Re-Os and Quartz Vein Rb-Sr Geochronology of the Luobuzhen Au-Ag and Hongshan Cu Deposits, Tibet, China: Implications for the Oligocene-Miocene Porphyry–Epithermal Metallogenic System

Minerals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 476
Author(s):  
Hanxiao Huang ◽  
Hong Liu ◽  
Guangming Li ◽  
Linkui Zhang ◽  
Huawen Cao ◽  
...  
Keyword(s):  
Quartz Vein ◽  
Porphyry Copper ◽  
Western China ◽  
Geochronological Data ◽  
Porphyry Cu ◽  
Metallogenic Belt ◽  
Granodiorite Porphyry ◽  
Epithermal Au ◽  
New Discovery ◽  
Metallogenic System

The Gangdese metallogenic belt in Tibet is an important copper and iron polymetallic, metallogenic belt in western China. The Luobuzhen epithermal Au-Ag and Hongshan porphyry Cu deposits, as two new discovery deposits in the last few years, are located in the western Gangdese metallogenic belt. In this paper, we present quartz vein Rb-Sr isochron, zircon U-Pb and molybdenite Re-Os ages for a better understanding of the minerallogenetic epoch of the deposits. Geochronological data show that the Rb-Sr isochron age of a quartz vein in a Luobuzhen Au-Ag deposit is 21.1 ± 1.8 Ma (MSWD (mean standard weighted deviation) = 0.19), zircon U-Pb ages from diorite and granodiorite porphyry in Hongshan Cu deposit are 50.0 ± 0.4 Ma (MSWD = 0.94) and 23.7 ± 0.1 Ma (MSWD = 0.73), respectively, and a Re-Os isochron age of molybdenite in Hongshan Cu deposit is 23.0 ± 2.0 Ma (MSWD = 0.014). These data suggest that the Luobuzhen epithermal Au-Ag and Hongshan porphyry Cu deposits formed at ca. 23–21 Ma, which were controlled by the same magmatic hydrothermal events. Formation of both the Luobuzhen and Hongshan deposits were obviously earlier than the Miocene porphyry metallogenetic events in the Gangdese porphyry copper belt.

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