芬兰北部克维特斯塔镍-铜-铂族元素矿床地质特征及矿床成因.pdf

第34卷第6期
地质通报
2015年6月
GEOLOGICAL BULLETIN OF CHINA
un.,2015
芬兰北部克维特斯塔镍一銅一铂族元素矿床
地质特征及矿床成因
张晓康2,聂凤军2,徐九华1,吴科锐12
ZHANG Xiaokang", NIE Fengjun, XU Jiuhua', WU Kerui'2
1北京科技大学土木与环境工程学院,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资源评价重点实验室,北京100037
1. Civil and Environmental Engineering School, University of Science and Technology Beiing, Beijing 100083, China
2 MRL Key Laboratory of Me logeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China
摘要:位于芬兰北部中拉普兰绿岩带的克维特斯塔( Kevitsの镍一铜一铂族元素矿床是世界上主要的岩浆镍一铜硫化物矿床之
。该矿床储量大,含丰富的镍一铜硫化物和铂族元素。对矿床产出环境、地质特征、矿床成因等进行了总结,结果表明:矿体
主要赋存于克维特斯塔基性一超基性层状侵入体的超基性单元中。主要矿石类型为普通型和镍一铂族元素型2种,其中镍
铂族元素型矿石内橄榄石具极高的i含量。主要矿石矿物为磁黄铁矿、镍黄铁矿、黄铜矿、黄铁矿、针硫镍矿、红砷镍矿、砷镍
矿、辉砷镍矿等,绝大部分铂族矿物包含在硅酸盐中和附着在硫化物颗粒边界。Re-Os、Sm-Nd、Sr及S同位素特征显示成矿
岩浆为慢源,但受到地壳物质的混染作用。Pb同位素年代学结果表明克维特斯塔侵入体形成于古元古代。
关键词:镍一铜一铂族元素矿床;层状侵入体;中拉普兰绿岩帯;橄榄石;芬兰
中图分类号:P618.2文献标志码:A文章编号:1671-2552(2015)06-1146-14
Zhang X K, Nie FJ, Xu J H, wu K R. Geological characteristics and genesis of the Kevitsa NI-CU-PGE deposit, northern
Finland. Geological Bulletin of China, 2015, 34(6) 1146-1159
Abstract: Located in the Central Lapland greenstone belt of northern Finland, the Kevitsa NI-CU-PGE deposit is one of the major
magmatic Ni-cu sulfide deposits in the world. The deposit has abundant reserves and is rich in Ni-cu sulfide and PGE. This paper
summarizes the environment, geological characteristics, ore genesis and other aspects of the ore deposit. The orebodies are mainly
ic unit in the Kevitsa mafic-ultramafic layered intrusions; the main ore types are divided into two types, i.e., com
mon type and NI-PGE type; the olivines in NI-PGE type have extremely high Ni content; thc main ore minerals include pyrrho-
tite, pentlandite, chalcopyrite yite, millerite, niccolite, chloanthite and ersdorffite, with most of the platinum group minerals con-
tained in the silicate or attached to the boundary of sulfide particles; Re-os, Sm-nd, Sr and S isotopic characteristics indicate that
mineralized magma was derived from the mantle, but the magma was contaminated by crustal substances; geochronologic analysis in-
dicates that Kevitsa intrusion was formed in the Paleoproterozoic.
Key words: NI-CU-PGE deposit; layered intrusions; central Lapland greenstone belt: olivine; Finland
)北部
1研究区概况
兰拉普兰( Lapland)省会罗瓦涅米(Rs
142kmn处,地理坐标为N67°40'、E26°50。克维特斯
11地理位置
塔地区地势平坦,平均海拔22~240m,其中克维特
克维特斯塔大型镍一铜一铂族元素矿床位于芬斯塔山海拔350m,位于矿区东南部。克维特斯塔地
收稿日期;2014-04-15;修订日期:2014-09-09
资助项目:中国地质调査局项目(编号:12120115065901、12120115068701、1212011120326)
作者简介:张晓康(1988-),男,在读硕士生,地质资源与地质工.程专业。Eーmail:mjkbxiaokang(@163.com
通讯作者:聂风军(1956-),男,研究员,博士生导师,从事金属矿床地质和地球化学研究。E-mai:nfij@cel.gov.cn