Late Early Cretaceous gold mineralization in Tan-Lu fault zone: evidence from Rb-Sr isotopic dating of pyrite from Longquanzhan gold deposit

被引：1

作者：

Shi, Wenjie ^{[1
]}

Wei, Junhao ^{[1
]}

Tan, Jun ^{[1
]}

Li, Yanjun ^{[1
]}

Fu, Lebing ^{[1
]}

Li, Huan ^{[1
]}

Zhao, Shaoqing ^{[1
]}

Tian, Ning ^{[1
]}

机构：

[1] Faculty of Earth Resources, China University of Geosciences

来源：

Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2014年 / 39卷 / 03期

关键词：

Geochronology; Jiaodong; Luxi; North China Craton; Ore deposits; Ore-forming time; Rb-Sr isotopic dating; Yi-Shu fault zone;

D O I：

10.3799/dqkx.2014.031

中图分类号：

学科分类号：

摘要：

Longquanzhan gold deposit, an important part of gold mineralization belt of Yi-Shu fault zone, is the only altered tectonite-type gold deposit discovered in the area at present. The ore bodies mainly occur at the fracture zone and the footwall metamorphic rocks. Rb-Sr isotopic dating of 10 pyrites separated from the Longquanzhan gold deposit yields an isochron age of 96±2 Ma (MSWD=1.2), which is in good agreement with the late Early Cretaceous to early Late Cretaceous magmatism (106-96 Ma) in adjacent area of Yi-Shu fault zone. Meanwhile, combining with the precise ages of gold deposits in Shandong Province and mineral exploration data, we suggest that late Early Cretaceous gold mineralization may occur in the southeastern margin of North China Craton, and its tectonic setting is related to an extensional setting which resulted in a large-scale asthenosphere upwelling, accompanying decompression and isotherm upwelling, material exchange and mixing between mantle and crust, and finally providing a great amount of ore-forming fluids and materials for gold mineralization. According to the precise age of Longquanzhan gold deposit reported, this discovery is of great significance both in gold deposit origin contrast of both sides and future mineral exploration.

引用

页码：325 / 340

页数：15

共 73 条

[1] Cai Y.C., Fan H.R., Hu F.F., Et al., Ore-forming fluids, stable isotope and mineralizing age of the Hubazhuang gold deposit, Jiaodong peninsula of eastern China, Acta Petrologica Sinica, 27, 5, pp. 1341-1351, (2011)
[2] Chen G.Y., Shao W., Sun D.S., Genetic Mineralogy of Gold Deposits in Jiaodong Region with Emphasis on Gold Prospecting, (1989)
[3] Chen Y.J., Pirajno F., Lai Y., Et al., Metallogenic time and tectonic setting of the Jiaodong Gold Province, eastern China, Acta Petrologica Sinica, 20, 4, pp. 907-922, (2004)
[4] Deng J., Yang L.Q., Fang Y., Et al., Crust-mantle interaction and ore-forming effect of gold ore deposits concentrated area in Jiaodong, Shandong, China, Scientia Geologica Sinica, 35, 1, pp. 60-70, (2000)
[5] Ding Z.J., Sun F.Y., Liu J.H., Et al., Re-Os dating of molybdenites from the Xingjiashan Molybdenum-Tungsten deposit in Jiaodong Peninsula, China and its geological significance, Acta Petrologica Sinica, 28, 9, pp. 2721-2732, (2012)
[6] Hou M.L., Jiang S.Y., Jiang Y.H., Et al., S-Pb isotope geochemistry and Rb-Sr geochronology of the Penglai gold field in the eastern Shandong Province, Acta Petrologica Sinica, 22, 10, pp. 2525-2533, (2006)
[7] Hu F.F., Fan H.R., Yang J.H., Et al., Mineralizing age of the Rushan lode gold deposit in the Jiaodong Peninsula: SHRIMP U-Pb dating on hydrothermal zircon, Chinese Science Bulletin, 49, 15, pp. 1629-1636, (2004)
[8] Hu F.F., Wang Y., Fan H.R., Et al., Geochronology and ore-forming fluids in the Jinchang Skarn gold-copper deposit, Yinan County, Western Shandong Province, Acta Petrologica Sinica, 26, 5, pp. 1503-1511, (2010)
[9] Jiang S.Y., Slack J.F., Palmer M.R., Sm-Nd dating of the giant sullivan Pb-Zn-Ag deposit, British Columbia, Geology, 28, 8, pp. 751-754, (2000)
[10] Jiang X.H., Fan H.R., Hu F.F., Et al., Ore-forming fluids and genesis of Liucun gold deposit in northwestern Jiaodong Peninsula, Mineral Deposits, 30, 3, pp. 511-521, (2011)

← 1 2 3 4 5 6 7 8 →