Geology and genesis of the Qi191 granite-hosted gold deposit in the southern margin of the North China Craton: constraints from SIMS zircon U–Pb, sericite 40Ar–39Ar, in-situ trace elements, and in-situ S–Pb isotopes

2021 ◽  
Author(s):  
Peng Wang ◽  
Hongying Li ◽  
Jingwen Mao ◽  
Huishou Ye ◽  
Sheng He ◽  
...  
Keyword(s):  
Trace Elements ◽  
Gold Deposit ◽  
North China Craton ◽  
North China ◽  
Pb Isotopes ◽  
The North ◽  
Southern Margin

Origin of the Qiyugou gold deposit in the southern margin of the North China Craton: Insights from trace elements of pyrite and mineralogy of Bi-minerals

2021 ◽  
Vol 133 ◽  
pp. 104085
Author(s):  
Qiang Wu ◽  
Tai-Ping Zhao ◽  
Wei Terry Chen ◽  
Xin-Yu Gao ◽  
Lei Meng ◽  
...  
Keyword(s):  
Trace Elements ◽  
Gold Deposit ◽  
North China Craton ◽  
North China ◽  
The North ◽  
Southern Margin

Late Ordovician fore-arc ophiolitic mélange in the southern margin of the Bainaimiao arc: constraints from zircon U–Pb–Hf isotopes and geochemical analyses

2021 ◽  
pp. 1-21
Author(s):  
Yun-Xi Meng ◽  
Zhi-Cheng Zhang ◽  
Jian-Zhou Tang ◽  
Huai-Hui Zhang ◽  
Qi Wang ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Tectonic Setting ◽  
Late Ordovician ◽  
Geochemical Characteristics ◽  
Ultramafic Rocks ◽  
The North ◽  
Ophiolitic Mélange ◽  
Southern Margin

Abstract The Harihada–Chegendalai ophiolitic mélange, which is located between the Bainaimiao arc and the North China Craton, holds significant clues regarding the tectonic setting of the southern margin of the Central Asian Orogenic Belt. The ophiolitic mélange is mainly composed of gabbroic and serpentinized ultramafic rocks. Here, zircon U–Pb dating, in situ zircon Hf isotopic, whole-rock geochemical and in situ mineral chemical data from the ophiolitic mélange are reported. The zircons in the gabbroic rocks yielded concordia U–Pb ages of 450–448 Ma and exhibited slightly positive ϵHf(t) values (0.87–4.34). The geochemical characteristics of the gabbroic rocks indicate that they were generated from a mantle wedge metasomatized by subduction-derived melts from sediments with continental crust contamination, in a fore-arc tectonic setting. These rocks also experienced the accumulation of plagioclase. The geochemical characteristics of the ultramafic rocks and their Cr-spinels indicate that they may constitute part of residual mantle that has experienced a high degree of partial melting and has interacted with fluids/melts released from the subducted slab in the same fore-arc tectonic setting. The ophiolitic mélange may therefore have formed in this fore-arc tectonic setting, resulting from the northward subduction of the South Bainaimiao Ocean beneath the Bainaimiao arc during Late Ordovician time, prior to the collision between the Bainaimiao arc and the North China Craton during the Silurian to Carboniferous periods.

PRECISE AGES FOR LODE GOLD MINERALIZATION IN THE XIAOQINLING GOLD FIELD, SOUTHERN MARGIN OF THE NORTH CHINA CRATON: NEW CONSTRAINTS FROM IN SITU U-Pb DATING OF HYDROTHERMAL MONAZITE AND RUTILE

2020 ◽  
Author(s):  
Junchen Liu ◽  
Yitian Wang ◽  
Jingwen Mao ◽  
Wei Jian ◽  
Shikang Huang ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Gold Mineralization ◽  
Late Mesozoic ◽  
The North ◽  
Southern Margin ◽  
Lithospheric Extension ◽  
Gold Producer ◽  
Gold Bearing

Abstract The Xiaoqinling gold field, located along the southern margin of the North China craton, is the second largest gold producer in China, which comprises more than 1,200 auriferous quartz veins with a proven gold reserve of at least 800 tons. Previously, the absolute age of the gold metallogenesis in this area has not been well defined due to the lack of suitable dating minerals. This study presents new in situ laser ablation-inductively coupled plasma-mass spectrometry U-Pb ages of coexisting hydrothermal monazite and rutile for the Fancha gold deposit in this area, which yielded 206Pb/238U ages of 127.5 ± 0.7 Ma (n = 65, mean square of weighted deviates [MSWD] = 1.8) and 129.7 ± 4.3 Ma (n = 37, MSWD = 1.4), respectively. Both ages overlap within analytical uncertainty at the 2σ level of significance, suggesting that both gold-bearing veins were emplaced at ca. 128 Ma. Mineralogical observations indicate that the monazite and rutile precipitated simultaneously with gold from the hydrothermal fluid. Our new data, combined with recently published monazite age, define a more precise gold episode, demonstrating that the gold endowment of the Xiaoqinling area was formed during a relatively brief period at ca. 130 to 127 Ma. We suggest that auriferous fluids were generated as a result of interactions between the enriched mantle and the lower crust, which was driven by westward flat slab subduction of the Paleo-Pacific plate during the late Mesozoic. The peak of lithospheric thinning during the postsubduction may have led to the rapid release of gold from the fertilized mantle. Consequently, the large number of gold-bearing veins in the Xiaoqinling area may ultimately be related to the tectonic evolution and mantle fluid processes that occurred during Early Cretaceous lithospheric extension.

Gold‐forming potential of the granitic plutons in the Xiaoqinling gold province, southern margin of the North China Craton: Perspectives from zircon U–Pb isotopes and geochemistry

2019 ◽  
Vol 55 (8) ◽  
pp. 5725-5744 ◽  
Author(s):  
Zi‐Hao Wen ◽  
Lin Li ◽  
Sheng‐Rong Li ◽  
M. Santosh ◽  
Masroor Alam ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Pb Isotopes ◽  
The North ◽  
Southern Margin

The gold occurrence in pyrite and Te–Bi mineralogy of the Fancha gold deposit, Xiaoqinling gold field, southern margin of the North China Craton: Implication for ore genesis

2019 ◽  
Vol 55 (8) ◽  
pp. 5791-5811 ◽  
Author(s):  
Junchen Liu ◽  
Yitian Wang ◽  
Shikang Huang ◽  
Ran Wei ◽  
Zhenghao Sun ◽  
...  
Keyword(s):  
Gold Deposit ◽  
North China Craton ◽  
North China ◽  
Ore Genesis ◽  
The North ◽  
Gold Occurrence ◽  
Southern Margin

In situ elemental and Sr-O isotopic studies on apatite from the Xu-Huai intrusion at the southern margin of the North China Craton: Implications for petrogenesis and metallogeny

2019 ◽  
Vol 510 ◽  
pp. 200-214 ◽  
Author(s):  
Sai-Jun Sun ◽  
Xiao-Yong Yang ◽  
Guang-Jie Wang ◽  
Wei-Dong Sun ◽  
Hong Zhang ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
The North ◽  
Southern Margin ◽  
Isotopic Studies

Fluid Inclusions and CHOSPb Isotopes: Implications for the Genesis of the Zhuanshanzi Gold Deposit on the Northern Margin of the North China Craton

2018 ◽  
Vol 69 (1) ◽  
pp. 1-21
Author(s):  
Zhenjun Sun ◽  
Zongqi Wang ◽  
Henan Yu ◽  
Chengyang Wang ◽  
Guanghu Liu ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Fluid Inclusions ◽  
North China Craton ◽  
North China ◽  
Pb Isotopes ◽  
Northern Margin ◽  
The North
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