湘东北幕阜山地区燕山期岩浆演化与稀有金属成矿的关系

doi:10.19388/j.zgdzdc.2019.06.03

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Abstract The big rare metal deposits, such as Chuanziyuan (Li ore and Nb-Ta ore), Liren (Nb-Ta ore) and Huxingshan (W ore and Be ore), are distributed in Mufushan area of Northeast Hunan, and this area is an important pegmatite-type rare metal deposits ore-concentrated area. According to the chronological and petrogeochemical characteristics of granite and pegmatite in Mufushan area, the authors discussed the relationship between Yanshanian magmatic activity and rare metal mineralization. The results show that the magmatic activity lasted from Jurassic (154 Ma) to Cretaceous (92 Ma), and complex granite bodies and pegmatite veins have been formed, with lithologic zonation characteristics in pegmatite veins. The ore-forming age of pegmatite (130~127 Ma) is similar to the rock-forming age of mica monzonitic granite (137~129 Ma), and the mineralization of pegmatite is closely related to the high differentiation evolution of magma. The lithologic zonation characteristics in pegmatite veins are affected by the ore-forming fluid temperature, and the temperature in pegmatite decreased with the increase of distance from the rock body. Therefore, the circular distribution pattern has been formed form the rook body, with a sequence order of the pegmatite-type Bb ore belt lin the rock body→the pegmatite-type Nb-Ta ore belt (0~3 km)→the pegmatite-type Li-Nb-Ta ore belt (3~5 km)→the quartz vein type Be ore belt.

Key words： Mufushan rock mass rare metal pegmatite Nb-Ta ore Li ore Be ore Northeast Hunan

Received: 17 April 2019

ZTFLH:	P618.6
	P618.7
	P588.13

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	Articles by authors
	WEN Chunhua
	LUO Xiaoya
	CHEN Jianfeng
	LIN Bihai
	LI Shengmiao

Cite this article:

WEN Chunhua,LUO Xiaoya,CHEN Jianfeng, et al. Relationship between Yanshanian magmatic activity and rare metal mineralization in Mufushan area of Northeast Hunan[J]. , 2019, 6(6): 19-28.

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http://www.zgdzdcbjb.com/EN/10.19388/j.zgdzdc.2019.06.03 OR http://www.zgdzdcbjb.com/EN/Y2019/V6/I6/19

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