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Geochronology, geochemistry and metallogenic dynamics of gold-polymetallic deposits in Xicha region, the northeastern margin of the North-China Platform
Qian Ye1; Sun JinLei1; Li YuJin1; Yu Na3; Liu JinLong4; Li BiLe1; Sun FengYue1
2020
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume36Issue:4Pages:1127-1150
AbstractXicha region is located in the northeastern margin of the North-China Platform. The study area has undergone the formation of the Archean crystalline basement of the North China Plate, the evolution of the Liaoji Ocean in the Proterozoic, the development and evolution of the Paleo-Asian Ocean tectonic domain in the Paleozoic-Mesozoic, and the overlap and transformation of the Paleo-Pacific tectonic domain in the Mesozoic-Cenozoic, which created a complex tectonic framework and also recorded abundant metallogenic information. In order to clarify the age and dynamics background of polymetallic metallogenesis in the study area, we conducted whole-rock geochemistry and zircon LA-ICP-MS U-Pb dating study on the ore-forming geological bodies of different mineralization. The results show that: (1) the zircon age of the Huanchagou Formation granulite with banded base metal mineralization is 2157Ma, and the Huanchagou Formatio is closely related to the intense submarine volcanic eruption caused by the subduction of the Liaoji oceanic crust. The banded mineralized volcanic-sedimentary rocks are formed during the interval of volcanic. (2) Zhengcha pluton, the ore-forming geological body of Zhengcha skarn-type lead-zinc deposit, was formed in the Late Triassic (224.3 similar to 218.5Ma) and composed of high-Mg-# diorite and low-Mg-# granite with adakite properties, which is the product of the thickened lower crust delamination caused by the closure and continuous collision orogeny of the Paleo-Asian Ocean, suggesting that the starting time of lithosphere thinning and destruction of craton in the northern margin of North-China Platform may be in Late Triassic. (3) The Xicha syenite porphyry is the metallogenic geological body of Xicha gold-silver deposit, and the zircon U-Pb age of which limits the metallogenic age to similar to 121.1Ma. And combined with previous study results, we believe that its formation is related to the extension after subduction of the Paleo-Pacific plate.
KeywordLIAO-JI BELT U-PB ZIRCON JILIN PROVINCE ISOTOPE SYSTEMATICS TECTONIC EVOLUTION JIAODONG PENINSULA CRUSTAL EVOLUTION YANSHAN PERIOD EASTERN BLOCK THRUST BELT Gold polymetallic Northeastern margin of the North-China Platform Liaoji Ocean the Paleo-Asian Ocean Subduction of the Paleo-Pacific plate Thinning of North China Craton Xicha region
Indexed ByCSCD
Language英语
CSCD IDCSCD:6753111
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/148784
Collection中国科学院金属研究所
Affiliation1.吉林大学
2.中国科学院地质与地球物理研究所
3.中山大学
4.中国科学院金属研究所
Recommended Citation
GB/T 7714
Qian Ye,Sun JinLei,Li YuJin,et al. Geochronology, geochemistry and metallogenic dynamics of gold-polymetallic deposits in Xicha region, the northeastern margin of the North-China Platform[J]. ACTA PETROLOGICA SINICA,2020,36(4):1127-1150.
APA Qian Ye.,Sun JinLei.,Li YuJin.,Yu Na.,Liu JinLong.,...&Sun FengYue.(2020).Geochronology, geochemistry and metallogenic dynamics of gold-polymetallic deposits in Xicha region, the northeastern margin of the North-China Platform.ACTA PETROLOGICA SINICA,36(4),1127-1150.
MLA Qian Ye,et al."Geochronology, geochemistry and metallogenic dynamics of gold-polymetallic deposits in Xicha region, the northeastern margin of the North-China Platform".ACTA PETROLOGICA SINICA 36.4(2020):1127-1150.
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