东秦岭丹凤地区伟晶岩型铀矿矿化特征与成矿模式

王江波; 侯晓华; 李万华; 张良; 赵友东; 陈宏斌; 李卫红

doi:10.3799/dqkx.2018.302

Volume 45 Issue 1

Jan. 2020

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Article Navigation > Earth Science > 2020 > 45(1): 61-71

Wang Jiangbo, Hou Xiaohua, Li Wanhua, Zhang Liang, Zhao Youdong, Chen Hongbin, Li Weihong, 2020. Metallogenic Characteristics and Metallogenic Model of the Pegmatite Type Uranium Deposit in Danfeng Area, Eastern Qinling Mountains. Earth Science, 45(1): 61-71. doi: 10.3799/dqkx.2018.302

Citation:

Wang Jiangbo, Hou Xiaohua, Li Wanhua, Zhang Liang, Zhao Youdong, Chen Hongbin, Li Weihong, 2020. Metallogenic Characteristics and Metallogenic Model of the Pegmatite Type Uranium Deposit in Danfeng Area, Eastern Qinling Mountains. Earth Science, 45(1): 61-71. doi: 10.3799/dqkx.2018.302

Citation:

Wang Jiangbo, Hou Xiaohua, Li Wanhua, Zhang Liang, Zhao Youdong, Chen Hongbin, Li Weihong, 2020. Metallogenic Characteristics and Metallogenic Model of the Pegmatite Type Uranium Deposit in Danfeng Area, Eastern Qinling Mountains. Earth Science, 45(1): 61-71. doi: 10.3799/dqkx.2018.302

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Metallogenic Characteristics and Metallogenic Model of the Pegmatite Type Uranium Deposit in Danfeng Area, Eastern Qinling Mountains

doi: 10.3799/dqkx.2018.302

1.
Department of Geology, Northwest University, Xi'an 710069, China
2.
Research Institute No. 203, CNNC, Xianyang 712000, China
3.
Institute of International Trade and Commerce, Xianyang 712046, China

Received Date: 2018-07-28
Publish Date: 2020-01-15

Abstract

Abstract

Pegmatite-type uranium deposit is the most important uranium deposit in the eastern part of northern Qinling metallogenic belt. This paper presents a study of the metallogenic and geochronological characteristics of the ore body,ores,and accessory minerals. Uranium ore-body occurs in pegmatite dykes around the garnet-bearing leucogranite and uraninite is the major industry mineral. The accessory minerals of uranium bearing pegmatite are similar to those of garnet-bearing granitic rocks,but different from gneissic granitic rocks. The results of LA-ICP-MS zircon U-Pb dating of uranium bearing pegmatite is 404.3±1.4 Ma,Early-Devonian. Comprehensive data suggest that the Danfeng garnet-bearing granitic rocks were derived from partial melting of Qinling Group in the post-collision setting during Early-Devonian. The residue magmas were enriched in Th-U and other moderate-incompatible elements but low content of volatile component which have relative short migration. The pegmatite-type uranium was formed near the internal and external contact zone of the pluton. The pluton was emplaced as the stock in the surface which experienced the long time uplift and erosion after the Triassic. Then the uranium-bearing pegmatite dykes were distributed around the stock,which resulted in the Guangshigou uranium deposit. The intrusions at the top were emplaced as the batholiths in the surface after the anabatic uplift and erosion. Thus,the uranium-bearing pegmatites were developed in the internal contact zone,for example,Chenjiazhuang uranium deposit. Based on the metallogenic model,Damaogou and Zhifanggou areas are determined as two areas of metallogenic prospect of pegmatite-type uranium deposit.
- pegmatite type uranium deposit,
- metallogenic characteristics,
- metallogenic model,
- Danfeng area,
- eastern Qinling mountains,
- petrology

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References(44)

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