俄罗斯贝辰加镍-铜硫化物矿床研究进展.pdf

第34卷第6期
地质通报
Vo134, No6
2015年6月
GEOLOGICAL BULLETIN OF CHTNA
Jun,2015
俄罗斯贝辰加镍一铜硫化物矿床研究进展
汪傲1,赵元艺2,许虹1,曹冲
WANG Ao, ZHAO Yuanyi, XU Hong, CAO Chong
1.中国地质大学(北京),北京100083;
2.中国地质科学院矿产资源研究所国土资源部成矿作用与矿产资源评价重点实验室,北京100037
1. China University of Geosciences, Beijing 100083, China
2. MRI Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy
of Geological Sciences, Beijing 100037, China
摘要:贝辰加镍一铜硫化物矿床位于俄罗斯北极圈内科拉半岛西北部,是一个世界级镍一铜矿集区。矿集区目前共发现25个
含工业矿体的侵入体,分东、西2个矿带,已探明镍资源量470×10c,品位1.2%,铜储量35×10t,品位0.9%,与俄罗斯诺里尔斯
克、加拿大萨德伯里、中国金川等矿床并列为世界级大型铜镍碗化物矿床。贝長加杂岩体由4套古元古代火山ー沉积旋回构
成,含矿的为第四套火山一沉积旋回皮尔咖加维建造。矿集区内的火山一沉积作用发生在1940~2590Ma之间,成矿作用发生在
1950~1990Ma之间,矿化作用发生在古元古代该地区岩浆演化的晚期阶段。贝辰加镍一铜矿赋矿岩石为富铁苦橄岩,具有高
铁、低AlO,高Tの2、Zェ和其他不相容元素的特点,强烈富集LREE,地球化学特征类似于板内玄武岩或碱性玄武岩。矿床成
矿模式为地慢柱分支分异成的贝辰加岩体侵入裂陷槽,其西部矿体侵入至沉积地层之上,东部矿体侵入到沉积地层内部。碗
通过岩浆侵位过程中的同化作用进入岩浆,形成硫化物嫆融体,并在后期经历了构造変形、热液叠加等作用后形成了浸染状、
角砾状等多种类型的矿化。
关键词:贝辰加;镍一铜硫化物矿床;科拉半岛;俄罗斯
中图分类号:P618.2文献标志码:A文章编号:1671-2552(2015)06-1110-09
Wang A, Zhao YY, Xu H, Cao C The progress in the study of the Pechenga Ni-cu sulfide deposit, Russia. Geological Bulle-
tin of China,2015,34(6):1110-1118
Abstract: Pechenga, a world-class Ni-cu sulfide deposit, is located in the Kola Peninsula of Russia. The Kola super-deep drilling
project is located right at the ore district. 25 intrusions with industrial orebodies have been found in the Pechenga district with tota
resources of 4.7 Mt Ni at 1. 2% grade and 3. 5 Mt Cu at 0.9% grade, and these orebodies can be assigned to east ore belt and west ore
belt. Pechenga, Norilsk (R ussia) Sudbury(Canada )and Jinchuan(China)are all the most famous world-class CU-NI sulfide deposits
The Pechenga complex consists of four sedimentary-volcanic cycles, and the orebody is within the fourth sedimentary-volcanic cy
cle Pilgujarvi Formation. The sedimentary-volcanic activities occurred between 1940MA and 2500MA, whereas the mineralization oc
curred in the late period volcanic activities of Pechenga between 1950M a and 1990MA. The mineralization of Pechenga took place
later than that of Norilsk, but earlier than that of Sudbury and Jinchun. The main host rock is ferropicrite, which is characterized by
high Fe and low Al, O, high Tio Zr and other incompatible elements, and strong enrichment of LREE. The ferropicrite is similar
to intraplate basalt and alkaline basalt in geochemical characteristics. The metallogenic model of Pechenga can be described as follows
the Pechenga intrusion derived from the branches of mantle plume intruded into rifts, and its west part reached the place above the
sedimentary strata, while the east part stopped its migration within the sedimentary strata. The sulfide melt was produced by the assim-
收稿日期:2014-04-15;修订日期:2014-09-09
资助项目:科技部国际合作项目(编号:2014DFR21270-3
作者简介:汪做(1990-),男,在读硕:士生,矿物学、岩石学、矿床学专业。E-mai:wang_ao63@163.com
通讯作者:赵元艺(1966-),男,博士,研究员,从事矿床学、地球化学研究。E-mal:yuanyizhao2@ina.com