Zircon Senstive High Resolution Ion Microprobe (SHRIMP) study of granitoid intrusions in Zhaoye Gold Belt of Shandong Province and its implication

被引:31
作者
苗来成
罗镇宽
黄佳展
关康
N.J. McNaughton
D. I. Groves
机构
[1] Key Centre for Strategic Mineral Deposits
[2] Tianjin 300061
[3] China
[4] Nedlands
[5] Department of Geology & Geophysics
[6] W.A. 6907
[7] Tianjin Geological Academy
[8] University of Western Australia
[9] Ministry of Metallurgical Industry
[10] Australia
关键词
Zhaoye Gold Belt; granitic intrusion. SHRIMP; magmatic zircon; inherited zircon;
D O I
暂无
中图分类号
P597 [同位素地质学与地质年代学];
学科分类号
070902 ;
摘要
The zircon Sensitive High Resolution Ion Microprobe (SHRIMP) results show that granitoid intrusions in Zhaoyc Gold Belt were emplaced at two periods of Mesozoic: Linglong and Luanjiahe types of granitic intrusions were emplaced between 160 Ma and 150 Ma (late Jurassic); Guojialing type of granodioritic intrusions, 130 Ma and 126 Ma (early Cretaceous). All the three types contain at least two major generations of inherited zircons with Precambrian ( >650 Ma) and early Mesozoic ages (200-250 Ma), respectively. The former suggests that these plu-tonic rocks are of crustal origin and that Precambrian basement with component of sialic crust up to 3.4 Ga old ( Middle Archean) exists in the region. The presence of abundant inherited zircons with early Mesozoic age indicates that the Precambrian basement was affected by a major tectono-thermal event, that is the collision of the North and South China blocks, at 250 Ma to 200 Ma. SHRIMP results also indicate that the gold mineralization in the region took place
引用
收藏
页码:361 / 369
页数:9
相关论文
共 3 条
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  • [2] Zhang Jiangxin,Ye Suzhi, Determinstion of Isotopic Ages for the Gold Deposits in Eastern Shandong (in Chinese). Zhang Zhenhai. . 1994
  • [3] Collision between the North and South China blocks: A crustal-detachment model for suturing in the region east of the Tanlu Fault. Li,Z. X. The Journal of Geology . 1994