LA-ICP-MS Zircon U-Pb Age and Geochemistry of Gabbros from the Huanghuatan Copper-Nickel Deposit, Inner Mongolia

ZHAO Ze-lin; LI Jun-jian; DANG Zhi-cai; FU Chao; TANG Wen-long; WANG Shou-guang; LIU Li-shuang; ZHAO Li-jun

doi:10.15898/j.cnki.11-2131/td.2016.02.014

2016 Vol. 35, No. 2

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Article navigation > Rock and Mineral Analysis > 2016 > 35(2): 208-216

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ZHAO Ze-lin, LI Jun-jian, DANG Zhi-cai, FU Chao, TANG Wen-long, WANG Shou-guang, LIU Li-shuang, ZHAO Li-jun. LA-ICP-MS Zircon U-Pb Age and Geochemistry of Gabbros from the Huanghuatan Copper-Nickel Deposit, Inner Mongolia[J]. Rock and Mineral Analysis, 2016, 35(2): 208-216. doi: 10.15898/j.cnki.11-2131/td.2016.02.014

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ZHAO Ze-lin, LI Jun-jian, DANG Zhi-cai, FU Chao, TANG Wen-long, WANG Shou-guang, LIU Li-shuang, ZHAO Li-jun. LA-ICP-MS Zircon U-Pb Age and Geochemistry of Gabbros from the Huanghuatan Copper-Nickel Deposit, Inner Mongolia[J]. Rock and Mineral Analysis, 2016, 35(2): 208-216. doi: 10.15898/j.cnki.11-2131/td.2016.02.014

LA-ICP-MS Zircon U-Pb Age and Geochemistry of Gabbros from the Huanghuatan Copper-Nickel Deposit, Inner Mongolia

1.
Graduate Department of Chinese Academy of Geological Sciences, Beijing 100037, China
2.
Tianjin Institute of Geology and Mineral Resources, China Geological Survey, Tianjin 300170, China
3.
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
4.
Geological Survey Institute of Inner Mongolia, Hohhot 010020, China

More Information

Corresponding author: LI Jun-jian, junjianl@163.com

Received Date: 08 April 2015

Revised Date: 05 March 2016

Accepted Date: 10 March 2016

Publish Date: 25 February 2016

Abstract

Abstract

A series of ultrabasic-acid igneous rocks are distributed in the belt of Urad houqi-Damaoqi-Siziwangqi, in middle Inner Mongolia. The formation age and geochemistry of these rocks can provide basic geological information for the metallogenic regularities of Cu-Ni deposits related to ultrabasic-basic rocks. The age and geochemistry can also be used to infer the tectonic setting during magma emplacement. The Huanghuatan copper-nickel deposit in Damaoqi was selected for this research. Because of less fractures, high transparency, uniform cathodoluminescence and clear oscillatory zonings, zircon U-Pb dating is prior to be tested on LA-ICP-MS. The result yielded a weighted age of 262.4±1.1 Ma. The geochemical characteristics investigated by X-ray Fluorescence Spectrometry (XRF) and Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) indicate that Huanghuatan gabbros may have formed in a post-collision tensional environment. Combining with previous studies, it is suggested that the central region of Inner Mongolia had entered into the post-collision stage during the late Permian (255-275 Ma), whereas the close of Paleo-Asian Ocean in this limited area occurred before late Permian (about 285 Ma). This conclusion provides the upper time limit for the close of Paleo-Asian Ocean and the tectonic setting of the central part of Inner Mongolia during middle-late Permian.
- Huanghuatan copper-nickel deposit in Inner Mongolia /
- gabbro /
- LA-ICP-MS zircon U-Pb dating /
- geochemistric characteristics /
- post collision

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