Zircon U-Pb geochronology, geochemical characteristics and geological significance of the pluton in the Shaoguoyingzi gold ore deposit in Jianping, western Liaoning

CHEN Jing-sheng; PENG Yan-dong; LIU Miao; XING De-he; LIWei-wei

doi:10.12029/gc20160203

2016 Vol. 43, No. 2

Article Contents

Article navigation > Geology in China > 2016 > (2): 395-409

Next Article Previous Article

CHEN Jing-sheng, PENG Yan-dong, LIU Miao, XING De-he, LIWei-wei. Zircon U-Pb geochronology, geochemical characteristics and geological significance of the pluton in the Shaoguoyingzi gold ore deposit in Jianping, western Liaoning[J]. Geology in China, 2016, (2): 395-409. doi: 10.12029/gc20160203

Citation:

CHEN Jing-sheng, PENG Yan-dong, LIU Miao, XING De-he, LIWei-wei. Zircon U-Pb geochronology, geochemical characteristics and geological significance of the pluton in the Shaoguoyingzi gold ore deposit in Jianping, western Liaoning[J]. Geology in China, 2016, (2): 395-409. doi: 10.12029/gc20160203

Zircon U-Pb geochronology, geochemical characteristics and geological significance of the pluton in the Shaoguoyingzi gold ore deposit in Jianping, western Liaoning

1.
College of Earth Sciences, Jilin University, Changchun 130026, Jilin, China;Shenyang Institute of Geology and Mineral Resource, Shenyang 110034, Liaoning, China
2.
Qinhuangdao Branch of Northeast University, Qinhuangdao 066004, Hebei, China
3.
Shenyang Institute of Geology and Mineral Resource, Shenyang 110034, Liaoning, China
4.
Institute of Geology and Mineral Resources of Liaoning, Shenyang 110029, Liaoning, China

Received Date: 18 March 2015

Revised Date: 21 April 2015

Publish Date: 24 April 2016

Abstract

Abstract

The Shaoguoyingzi intrusion is located in the Chifeng-Chaoyang gold concentration area on the northern margin of the North China Craton, surrounded by Shaoguoyingzi and Zhuanshanzi gold deposits or gold ore spots. The lithology of the intrusion is monzogranite which shares the same source with the gold deposits. The zircon U-Pb age data obtained by using laser ablation ICPMS technique are 159.1±1.5 Ma, 160.2±4.4 Ma and 160.1±1.1 Ma, which indicate that the Shaoguoyingzi intrusion was formed in Late Jurassic and the gold deposits were formed at the same time or a little later. The major and rare elements are characterized by high Si, low Al, medium alkali, poor Mg and Ca, rich Th, Zr, Nd, Rb and K and comparatively low Ba, Sr, P and Ti, with obvious negative Eu(δ Eu=0.08-0.60)and Sr anomalies; which indicates that the Shaoguoyingzi intrution is a high-K calc-alkaline I-type granite that has experienced a high degree of crystallization and differentiation. The depth of the source is about 30km, as shown by the characteristics of Sr-Yb-Y. This area was a tectonic transition period in late Jurassic, and the intrusion was formed by back-arc extension in the Pacific plate subduction environment, as shown by an analysis of the regional tectonic environment.
- Shaoguoyingzi intrusion /
- gold deposit /
- zircon U-Pb age /
- characteristics of geochemistry /
- dynamic background