中非赞比亚成矿带谦比希铜钴矿床钴的赋存状态与成矿规律

doi:10.13745/j.esf.sf.2021.1.25

地学前缘 ›› 2021, Vol. 28 ›› Issue (3): 338-354.DOI: 10.13745/j.esf.sf.2021.1.25

• 成矿模式与定量找矿模型 • 上一篇下一篇

中非赞比亚成矿带谦比希铜钴矿床钴的赋存状态与成矿规律

卢宜冠¹(), 涂家润¹, 孙凯¹, 覃鹏², 王华青³, 何胜飞¹, 张航¹, 龚鹏辉¹, 郭硕¹, 方科², 和文言⁴^,^*()

1.中国地质调查局天津地质调查中心, 天津 300170
2.中国有色桂林矿产地质研究院有限公司, 广西桂林 541004
3.中国冶金地质总局, 北京 100025
4.中国地质大学(北京) 地质过程与矿产资源国家重点实验室, 北京 100083

收稿日期:2021-01-05 修回日期:2021-03-03 出版日期:2021-05-20 发布日期:2021-05-23
通讯作者: 和文言
作者简介:卢宜冠(1990—),男,博士,高级工程师,主要从事矿产勘查与矿床学研究工作。E-mail: luyiguan@mail.cgs.gov.cn
基金资助:
中国地质调查项目(DD20190439);中国地质调查项目(1212011220910);商务部援外项目([2015]352);国家自然科学基金项目(42002110)

Cobalt occurrence and ore-forming process in the Chambishi deposit in the Zambian Copperbelt, Central Africa

LU Yiguan¹(), TU Jiarun¹, SUN Kai¹, QIN Peng², WANG Huaqing³, HE Shengfei¹, ZHANG Hang¹, GONG Penghui¹, GUO Shuo¹, FANG Ke², HE Wenyan⁴^,^*()

1. Tianjin Center, China Geological Survey, Tianjin 300170, China
2. China Nonferrous Metals(Guilin) Geology and Mining Co., Ltd., Guilin 541004, China
3. China Metallurgical Geology Bureau, Beijing 100025, China
4. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences(Beijing), Beijing 100083, China

Received:2021-01-05 Revised:2021-03-03 Online:2021-05-20 Published:2021-05-23
Contact: HE Wenyan

摘要/Abstract

摘要：

谦比希铜钴矿床是中非赞比亚成矿带重要的超大型铜钴矿床之一,由主矿体、西矿体和东南矿体3部分组成,赋矿层位主要为下罗安亚群敏多拉组和基特韦组,岩性包括泥质板岩、泥质石英岩、板岩、石英砂岩等。现有资料对于矿床中钴的赋存状态和含钴矿物成因的研究较为薄弱,这也直接制约了对钴矿的成因认识及今后找矿方向。本次研究聚焦谦比希矿床中的富钴矿物,对该类矿物进行电子探针、微区X射线荧光光谱分析和S同位素研究,通过查明谦比希矿床中钴的赋存状态及成因机制,为今后区域上钴资源的找矿勘查提供理论依据。分析结果表明谦比希矿床中钴以独立矿物和类质同象形式存在,其中独立矿物主要为硫铜钴矿和硫钴矿。在热液黄铁矿(Py2)和磁黄铁矿中,钴含量最高分别可达4.9%和1.5%,Co与Fe含量成反比关系且Co富集区域较为均匀地分布在硫化物中,说明Co取代Fe以类质同象方式赋存于黄铁矿和磁黄铁矿中。此外,谦比希矿床热液期黄铁矿-磁黄铁矿的Co-Ni范围不同于夕卡岩型及其他几种成矿类型的黄铁矿和磁黄铁矿,结合前人对热液矿化期流体包裹体的H-O同位素研究,暗示富钴的成矿流体可能并非岩浆热液流体,而是中-高温的变质热液流体。西矿体斑铜矿和东南矿体磁黄铁矿δ³⁴S值分别为6‰~6.9‰和7.2‰~12.6‰,表明热化学硫酸盐还原作用是谦比希矿床还原性硫形成的主要机制,硫化物在经历了变质作用后δ³⁴S值具有均一化。综合本文和前人已有研究,我们认为钴的主成矿期与卢菲利安造山作用密切相关,造山期中-高温变质热液使得钴、铜等金属元素再富集。NE-SW向挤压形成的褶皱枢纽及特定走向断层的交汇处等构造发育部位可以作为钴矿体的有利找矿地段,而热液脉中的黄铁矿-磁黄铁矿组合可作为区域上寻找钴矿体的矿物标志。

关键词: 赞比亚成矿带, 谦比希, 钴, 赋存状态, 成矿规律

Abstract:

The Chambishi Cu-Co deposit is one of the important giant Cu-Co deposits in Copperbelt province, Zambia, Central Africa, consisting the Main, West and Southeast orebodies. Its ore-bearing horizon is mainly the Mindola and Kitwe formations of the Lower Roan group, and its lithology includes argillaceous slate, argillaceous quartzite, slate, quartz sandstone, etc. The existing data on the cobalt occurrence mode is relatively weak and the genesis of Co-bearing minerals is not well understood, which directly hinders cobalt prospecting in the deposit. Focusing on the Co-rich minerals in this study, we conducted EPMA, Micro-XRF and S isotope analyses to investigate the Co occurrence modes and formation mechanism of Co-bearing minerals, in the Chambishi deposit, aiming to provide a theoretical basis for the future exploration of Co resources in the region. Our study shows that cobalt occurs as stand-alone minerals (mainly carrollite and linnaeite) or in Co-bearing minerals via isomorphism. In pyrite (Py2) and pyrrhotite formed from hydrothermal fluid, the cobalt content was up to 4.9% and 1.5%, respectively. Cobalt enrichment via isomorphism is evident by the inverse proportion between Co and Fe contents and by the relatively even distribution of Co components in the Co-bearing minerals. Moreover, the Co/Ni ratio in pyrite and pyrrhotite differs between the Chambishi deposit and skarn or other deposit types. Together with the hydrogen and oxygen isotope studies of fluid inclusions in the hydrothermal mineralization stage, it is implied that the Co-rich ore-forming fluid might not be magmatic-hydrothermal fluid but medium-high temperature metamorphic-hydrothermal fluid. The δ³⁴S values of bornite from the West orebody and pyrrhotite from the Southeast orebody were 6‰-6.9‰ and 7.2‰-12.6‰, respectively, indicating that thermochemical sulfate reduction is the main formation mechanism of reductive sulfur in the Chambishi deposit; the similar δ³⁴S values is also an indication of late metamorphism in the sulfide minerals. Based on this and previous studies, we suggest that the main mineralization stage of cobalt is closely related to the Lufilian orogeny. During the orogenic process, Co, Cu and other metal elements tend to enrich in the medium-high temperature metamorphic hydrothermal fluid. The hinge area formed by a NE-SW compression and the connecting area of specific strike faults can be the favorable prospecting targets for cobalt, and the pyrite-pyrrhotite assemblage in the hydrothermal veins can be used as mineral markers for cobalt prospecting.

Key words: Zambian Copperbelt, Chambishi, cobalt, occurrence status, ore-forming mechanism

中图分类号:

卢宜冠, 涂家润, 孙凯, 覃鹏, 王华青, 何胜飞, 张航, 龚鹏辉, 郭硕, 方科, 和文言. 中非赞比亚成矿带谦比希铜钴矿床钴的赋存状态与成矿规律[J]. 地学前缘, 2021, 28(3): 338-354.

LU Yiguan, TU Jiarun, SUN Kai, QIN Peng, WANG Huaqing, HE Shengfei, ZHANG Hang, GONG Penghui, GUO Shuo, FANG Ke, HE Wenyan. Cobalt occurrence and ore-forming process in the Chambishi deposit in the Zambian Copperbelt, Central Africa[J]. Earth Science Frontiers, 2021, 28(3): 338-354.

图/表 15

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编号	矿体名称		矿石构造		矿物名称		w_B/%
编号	矿体名称		矿石构造		矿物名称		As		Se		Au		Mo		S		Ag		Sn		Sb		Te		Mn		Fe		Co	Ni	Cu	Zn	Total
QBXDN-1-2-4	谦比希东南		层状/脉状		黄铜矿		0.292		-		-		0.317		33.557		0.002		-		0.009		-		-		30.44		0.044	0.007	34.324	-	98.992
QBXDN-1-2-6	谦比希东南		层状/脉状		黄铜矿		0.315		-		-		0.294		33.73		-		-		0.004		-		-		30.405		0.036	-	34.576	0.026	99.386
QBXDN-4-1-2	谦比希东南		团块状		黄铜矿		0.243		0.009		0.02		0.296		32.893		0.003		-		0.01		0.004		-		29.193		0.044	-	32.557	0.166	95.438
QBXDN-4-1-4	谦比希东南		团块状		黄铜矿		0.323		0.007		0.003		0.34		34.787		-		0.001		0.002		0.029		0.001		30.841		0.045	0.009	33.788	0.127	100.303
QBXDN-5-3-9	谦比希东南		脉状		黄铜矿		0.304		0.011		0.06		0.301		35.2		0.005		-		0.005		-		-		30.038		0.029	-	32.643	0.04	98.636
QBXDN-18-1-0	谦比希东南		浸染状		黄铜矿		0.277		-		-		0.355		34.876		0.008		-		-		0.003		-		30.241		0.035	0.016	33.98	0.047	99.838
QBXDN-18-2-3	谦比希东南		浸染状		黄铜矿		0.298		-		0.029		0.363		35.546		-		-		-		0.01		-		30.628		0.022	-	34.602	0.037	101.535
QBXDN-18-2-6	谦比希东南		浸染状		黄铜矿		0.284		-		-		0.373		35.46		-		-		-		-		0.001		30.58		0.031	-	34.646	0.101	101.476
QBXDN-19-1-1	谦比希东南		浸染状		黄铜矿		0.311		0.018		-		0.276		33.726		-		-		0.001		-		0.01		30.198		0.061	0.001	32.871	0.09	97.563
QBXDN-19-2-5	谦比希东南		浸染状		黄铜矿		0.311		-		-		0.308		33.458		0.016		-		0.004		-		-		30.243		0.054	0.014	33.498	0.055	97.961
QBXX-3-2-4	谦比希西		团块状		黄铜矿		0.26		-		0.039		0.306		34.204		-		0.009		0.012		0.011		-		29.725		0.027	-	34.06	0.027	98.68
QBXX-3-2-4B	谦比希西		团块状		黄铜矿		0.335		-		0.018		0.419		34.777		0.002		-		-		0.015		-		29.977		0.022	-	34.496	0.031	100.092
QBXX-3-2-6	谦比希西		团块状		黄铜矿		0.261		-		-		0.34		34.24		0.006		-		0.002		0.006		0.011		29.278		0.008	-	33.151	-	97.303
QBXX-8-1-2	谦比希西		团块状		黄铜矿		0.334		0.014		0.023		0.285		35.156		-		-		-		-		-		29.752		0.024	-	33.586	0.01	99.184
QBXX-8-2-5	谦比希西		团块状		黄铜矿		0.299		-		0.014		0.395		35.035		-		-		-		0.009		-		30.106		-	-	33.513	0.05	99.421
QBXX-8-3-7	谦比希西		团块状		黄铜矿		0.267		-		0.066		0.335		34.523		0.002		-		-		0.005		0.009		29.598		0.009	-	33.156	0.019	97.989
QBXX-10-2-6	谦比希西		团块状		黄铜矿		0.257		0.031		0.014		0.304		34.551		0.025		-		0.011		-		0.001		30.144		0.03	-	33.371	0.066	98.805
QBXX-10-3-7	谦比希西		团块状		黄铜矿		0.269		0.009		-		0.382		34.661		-		-		-		-		0.005		30.367		0.061	-	33.459	0.129	99.342
QBXX-3-1-2	谦比希西		团块状		斑铜矿		0.119		0.015		-		0.303		26.291		0.049		-		0.009		0.025		-		10.797		-	-	62.422	0.056	100.086
QBXX-3-2-3	谦比希西		团块状		斑铜矿		0.12		-		-		0.246		25.78		0.044		0.002		0.002		-		-		10.944		0.012	-	62.687	0.013	99.85
QBXX-3-2-5	谦比希西		团块状		斑铜矿		0.122		-		0.005		0.253		25.775		0.043		-		0.015		-		0.027		10.801		0.014	-	60.795	0.035	97.885
QBXX-8-1-3	谦比希西		团块状		斑铜矿		0.168		-		-		0.257		26.693		0.029		-		0.01		0.005		-		11.249		0.254	-	60.313	0.024	99.002
QBXX-8-2-4	谦比希西		团块状		斑铜矿		0.178		-		-		0.234		26.446		0.032		-		0.007		-		0.02		11.411		0.031	-	59.897	0.022	98.278
QBXX-8-3-6	谦比希西		团块状		斑铜矿		0.165		-		-		0.286		25.481		0.025		-		-		0.011		-		10.693		0.008	-	57.595	0.115	94.379
QBXX-10-1-2	谦比希西		团块状		斑铜矿		0.152		0.03		-		0.23		25.707		0.058		0.009		0.014		0.004		-		11.233		0.021	-	62.189	0.096	99.743
QBXX-10-2-5	谦比希西		团块状		斑铜矿		0.124		-		0.003		0.227		25.587		0.032		-		0.006		0.009		0.012		10.316		-	-	61.024	0.057	97.397
QBXX-10-3-8	谦比希西		团块状		斑铜矿		0.146		-		0.019		0.205		26.222		0.03		-		0.025		-		0.017		11.035		0.002	-	60.584	0.057	98.342
QBXDN-1-2-3	谦比希东南		层状/脉状		磁黄铁矿		0.608		-		-		0.342		38.29		0.016		0.003		-		0.01		-		59.256		0.294	-	-	0.017	98.836
QBXDN-1-2-5	谦比希东南		层状/脉状		磁黄铁矿		0.565		0.005		0.009		0.417		37.486		-		-		0.001		0.005		0.001		59.944		0.383	-	0.037	-	98.853
编号	矿体名称	矿石构造		矿物名称		w_B/%
编号	矿体名称	矿石构造		矿物名称		As		Se		Au		Mo		S		Ag		Sn		Sb		Te		Mn		Fe		Co		Ni	Cu	Zn	Total
QBXDN-1-3-15	谦比希东南	层状/脉状		磁黄铁矿		0.592		-		-		0.354		37.755		-		-		-		0.026		-		59.217		1.515		0.129	0.079	0.031	99.698
QBXDN-1-3-7	谦比希东南	层状/脉状		磁黄铁矿		0.505		-		0.015		0.382		37.563		-		-		0.003		0.008		-		59.857		0.469		0.013	-	0.079	98.894
QBXDN-4-1-3	谦比希东南	团块状		磁黄铁矿		0.556		0.021		0.038		0.353		38.394		-		-		0.017		0.009		-		60.258		0.163		-	-	0.014	99.823
QBXDN-4-1-6	谦比希东南	团块状		磁黄铁矿		0.472		0.028		-		0.333		38.567		0.034		-		0.001		0.006		-		60.833		0.238		0.027	-	-	100.539
QBXDN-5-2-4	谦比希东南	脉状		磁黄铁矿		0.47		0		-		0.319		39.616		-		-		-		0.007		-		58.268		1.25		0.063	0.035	0.025	100.053
QBXDN-5-3-10	谦比希东南	脉状		磁黄铁矿		0.489		0		0.01		0.382		40.044		0.013		-		-		-		-		59.408		0.391		0.07	-	0.074	100.881
QBXDN-19-1-3	谦比希东南	浸染状		磁黄铁矿		0.622		0.009		-		0.347		37.664		-		-		-		-		0.016		59.594		0.221		0.026	-	-	98.499
QBXDN-19-2-4	谦比希东南	浸染状		磁黄铁矿		0.566		0.008		-		0.321		37.903		0.004		-		-		0.003		0.004		59.246		0.43		0.038	0.019	-	98.542
QBXDN-5-1-1	谦比希东南	脉状		黄铁矿		0.556		0.018		-		0.461		53.614		-		-		0.007		0.001		-		41.865		4.619		-	0.005	-	101.146
QBXDN-5-1-2	谦比希东南	脉状		黄铁矿		1.073		0.012		-		0.425		53.654		0.004		0.084		0.008		-		0.02		41.493		4.943		-	-	0.007	101.723
QBXDN-5-1-3	谦比希东南	脉状		黄铁矿		0.717		-		0.005		0.433		53.556		-		-		-		-		-		42.577		4.349		-	0.01	-	101.647
QBXDN-5-2-5	谦比希东南	脉状		黄铁矿		0.365		0.017		0.013		0.458		53.806		0.005		-		-		0.034		-		42.531		4.406		0.034	0.023	-	101.692
QBXDN-5-2-6	谦比希东南	脉状		黄铁矿		0.516		-		-		0.437		53.73		-		-		-		0.008		-		42.667		3.783		0.001	0.016	0.069	101.227
QBXDN-5-2-7	谦比希东南	脉状		黄铁矿		0.272		-		-		0.426		53.318		0.017		-		-		0.002		-		42.207		4.489		-	-	-	100.731
QBXDN-5-3-8	谦比希东南	脉状		黄铁矿		0.327		-		0.01		0.455		53.869		0.004		-		-		-		-		41.877		4.357		0.003	0.042	0.04	100.984
QBXDN-18-1-1	谦比希东南	浸染状		黄铁矿		0.346		-		-		0.452		54.199		0.01		-		-		0.016		0.003		46.566		0.069		-	0.017	0.038	101.716
QBXDN-18-1-2	谦比希东南	浸染状		黄铁矿		0.348		0.031		0.038		0.467		54.949		0.001		-		-		0.017		-		47.284		0.056		0.051	0.063	0.031	103.336
QBXDN-18-2-4	谦比希东南	浸染状		黄铁矿		0.38		-		-		0.454		55.32		-		-		0.013		-		-		46.682		0.075		0.044	0.206	0.017	103.191
QBXDN-18-2-5	谦比希东南	浸染状		黄铁矿		0.448		0.02		-		0.493		54.916		0.003		-		-		-		0.003		46.927		0.067		-	0.252	0.08	103.209
QBXDN-1-2-13	谦比希东南	层状/脉状		硫钴矿		0.039		0.009		0.01		0.278		32.133		-		-		0.003		0.009		0.023		4.967		59.923		3.532	0.012	-	100.938
QBXDN-1-2-14	谦比希东南	层状/脉状		硫钴矿		0.023		-		-		0.313		32.914		-		0.017		0.018		-		0.002		4.834		60.251		2.813	0.05	-	101.235
QBXDN-4-1-1	谦比希东南	团块状		硫钴矿		0.018		0.036		-		0.322		32.713		-		0.012		0.034		-		-		4.926		60.688		2.728	0.021	-	101.498
QBXDN-4-1-5	谦比希东南	团块状		硫钴矿		0.014		0.043		-		0.286		33.23		0.001		-		-		-		0.01		4.675		61.517		2.329	-	-	102.105
QBXDN-19-1-2	谦比希东南	浸染状		硫钴矿		0.064		0.032		-		0.269		31.96		0.008		0.006		-		0.003		0.002		7.696		57.328		0.491	-	-	97.859
QBXDN-19-2-6	谦比希东南	浸染状		硫钴矿		0.01		0.086		-		0.507		40.601		-		0.01		0.004		-		-		2.46		48.232		3.348	2.825	-	98.083
QBXDN-1-2-12	谦比希东南	层状/脉状		硫铜钴矿		0.096		0.028		0.028		0.272		30.611		0.008		-		-		0.019		-		8.58		45.879		2.243	8.742	-	96.506
QBXX-3-1-1	谦比希西	团块状		硫铜钴矿		-		-		-		0.358		41.828		0.02		0.01		-		-		0.017		0.154		44.336		0.833	12.949	-	100.505
QBXX-8-1-1	谦比希西	团块状		硫铜钴矿		-		0.014		0.024		0.331		42.286		0.004		-		0.034		-		0.008		0.15		44.085		1.552	12.388	-	100.876
QBXX-10-1-1	谦比希西	团块状		硫铜钴矿		0.015		0.028		0.012		0.36		39.73		0.017		-		0.025		-		-		1.233		37.021		2.469	18.378	-	99.288
QBXX-10-2-3	谦比希西	团块状		硫铜钴矿		0.003		0.023		-		0.329		41.656		0.003		-		0.025		0.021		-		0.173		43.378		2.155	13.117	-	100.883
QBXX-10-2-4	谦比希西	团块状		硫铜钴矿		-		0.007		-		0.337		41.895		0.001		0.001		0.003		0.011		0.006		0.065		43.571		2.3	12.611	-	100.808

编号	矿体名称		矿石构造		矿物名称		w_B/%
编号	矿体名称		矿石构造		矿物名称		As		Se		Au		Mo		S		Ag		Sn		Sb		Te		Mn		Fe		Co	Ni	Cu	Zn	Total
QBXDN-1-2-4	谦比希东南		层状/脉状		黄铜矿		0.292		-		-		0.317		33.557		0.002		-		0.009		-		-		30.44		0.044	0.007	34.324	-	98.992
QBXDN-1-2-6	谦比希东南		层状/脉状		黄铜矿		0.315		-		-		0.294		33.73		-		-		0.004		-		-		30.405		0.036	-	34.576	0.026	99.386
QBXDN-4-1-2	谦比希东南		团块状		黄铜矿		0.243		0.009		0.02		0.296		32.893		0.003		-		0.01		0.004		-		29.193		0.044	-	32.557	0.166	95.438
QBXDN-4-1-4	谦比希东南		团块状		黄铜矿		0.323		0.007		0.003		0.34		34.787		-		0.001		0.002		0.029		0.001		30.841		0.045	0.009	33.788	0.127	100.303
QBXDN-5-3-9	谦比希东南		脉状		黄铜矿		0.304		0.011		0.06		0.301		35.2		0.005		-		0.005		-		-		30.038		0.029	-	32.643	0.04	98.636
QBXDN-18-1-0	谦比希东南		浸染状		黄铜矿		0.277		-		-		0.355		34.876		0.008		-		-		0.003		-		30.241		0.035	0.016	33.98	0.047	99.838
QBXDN-18-2-3	谦比希东南		浸染状		黄铜矿		0.298		-		0.029		0.363		35.546		-		-		-		0.01		-		30.628		0.022	-	34.602	0.037	101.535
QBXDN-18-2-6	谦比希东南		浸染状		黄铜矿		0.284		-		-		0.373		35.46		-		-		-		-		0.001		30.58		0.031	-	34.646	0.101	101.476
QBXDN-19-1-1	谦比希东南		浸染状		黄铜矿		0.311		0.018		-		0.276		33.726		-		-		0.001		-		0.01		30.198		0.061	0.001	32.871	0.09	97.563
QBXDN-19-2-5	谦比希东南		浸染状		黄铜矿		0.311		-		-		0.308		33.458		0.016		-		0.004		-		-		30.243		0.054	0.014	33.498	0.055	97.961
QBXX-3-2-4	谦比希西		团块状		黄铜矿		0.26		-		0.039		0.306		34.204		-		0.009		0.012		0.011		-		29.725		0.027	-	34.06	0.027	98.68
QBXX-3-2-4B	谦比希西		团块状		黄铜矿		0.335		-		0.018		0.419		34.777		0.002		-		-		0.015		-		29.977		0.022	-	34.496	0.031	100.092
QBXX-3-2-6	谦比希西		团块状		黄铜矿		0.261		-		-		0.34		34.24		0.006		-		0.002		0.006		0.011		29.278		0.008	-	33.151	-	97.303
QBXX-8-1-2	谦比希西		团块状		黄铜矿		0.334		0.014		0.023		0.285		35.156		-		-		-		-		-		29.752		0.024	-	33.586	0.01	99.184
QBXX-8-2-5	谦比希西		团块状		黄铜矿		0.299		-		0.014		0.395		35.035		-		-		-		0.009		-		30.106		-	-	33.513	0.05	99.421
QBXX-8-3-7	谦比希西		团块状		黄铜矿		0.267		-		0.066		0.335		34.523		0.002		-		-		0.005		0.009		29.598		0.009	-	33.156	0.019	97.989
QBXX-10-2-6	谦比希西		团块状		黄铜矿		0.257		0.031		0.014		0.304		34.551		0.025		-		0.011		-		0.001		30.144		0.03	-	33.371	0.066	98.805
QBXX-10-3-7	谦比希西		团块状		黄铜矿		0.269		0.009		-		0.382		34.661		-		-		-		-		0.005		30.367		0.061	-	33.459	0.129	99.342
QBXX-3-1-2	谦比希西		团块状		斑铜矿		0.119		0.015		-		0.303		26.291		0.049		-		0.009		0.025		-		10.797		-	-	62.422	0.056	100.086
QBXX-3-2-3	谦比希西		团块状		斑铜矿		0.12		-		-		0.246		25.78		0.044		0.002		0.002		-		-		10.944		0.012	-	62.687	0.013	99.85
QBXX-3-2-5	谦比希西		团块状		斑铜矿		0.122		-		0.005		0.253		25.775		0.043		-		0.015		-		0.027		10.801		0.014	-	60.795	0.035	97.885
QBXX-8-1-3	谦比希西		团块状		斑铜矿		0.168		-		-		0.257		26.693		0.029		-		0.01		0.005		-		11.249		0.254	-	60.313	0.024	99.002
QBXX-8-2-4	谦比希西		团块状		斑铜矿		0.178		-		-		0.234		26.446		0.032		-		0.007		-		0.02		11.411		0.031	-	59.897	0.022	98.278
QBXX-8-3-6	谦比希西		团块状		斑铜矿		0.165		-		-		0.286		25.481		0.025		-		-		0.011		-		10.693		0.008	-	57.595	0.115	94.379
QBXX-10-1-2	谦比希西		团块状		斑铜矿		0.152		0.03		-		0.23		25.707		0.058		0.009		0.014		0.004		-		11.233		0.021	-	62.189	0.096	99.743
QBXX-10-2-5	谦比希西		团块状		斑铜矿		0.124		-		0.003		0.227		25.587		0.032		-		0.006		0.009		0.012		10.316		-	-	61.024	0.057	97.397
QBXX-10-3-8	谦比希西		团块状		斑铜矿		0.146		-		0.019		0.205		26.222		0.03		-		0.025		-		0.017		11.035		0.002	-	60.584	0.057	98.342
QBXDN-1-2-3	谦比希东南		层状/脉状		磁黄铁矿		0.608		-		-		0.342		38.29		0.016		0.003		-		0.01		-		59.256		0.294	-	-	0.017	98.836
QBXDN-1-2-5	谦比希东南		层状/脉状		磁黄铁矿		0.565		0.005		0.009		0.417		37.486		-		-		0.001		0.005		0.001		59.944		0.383	-	0.037	-	98.853
编号	矿体名称	矿石构造		矿物名称		w_B/%
编号	矿体名称	矿石构造		矿物名称		As		Se		Au		Mo		S		Ag		Sn		Sb		Te		Mn		Fe		Co		Ni	Cu	Zn	Total
QBXDN-1-3-15	谦比希东南	层状/脉状		磁黄铁矿		0.592		-		-		0.354		37.755		-		-		-		0.026		-		59.217		1.515		0.129	0.079	0.031	99.698
QBXDN-1-3-7	谦比希东南	层状/脉状		磁黄铁矿		0.505		-		0.015		0.382		37.563		-		-		0.003		0.008		-		59.857		0.469		0.013	-	0.079	98.894
QBXDN-4-1-3	谦比希东南	团块状		磁黄铁矿		0.556		0.021		0.038		0.353		38.394		-		-		0.017		0.009		-		60.258		0.163		-	-	0.014	99.823
QBXDN-4-1-6	谦比希东南	团块状		磁黄铁矿		0.472		0.028		-		0.333		38.567		0.034		-		0.001		0.006		-		60.833		0.238		0.027	-	-	100.539
QBXDN-5-2-4	谦比希东南	脉状		磁黄铁矿		0.47		0		-		0.319		39.616		-		-		-		0.007		-		58.268		1.25		0.063	0.035	0.025	100.053
QBXDN-5-3-10	谦比希东南	脉状		磁黄铁矿		0.489		0		0.01		0.382		40.044		0.013		-		-		-		-		59.408		0.391		0.07	-	0.074	100.881
QBXDN-19-1-3	谦比希东南	浸染状		磁黄铁矿		0.622		0.009		-		0.347		37.664		-		-		-		-		0.016		59.594		0.221		0.026	-	-	98.499
QBXDN-19-2-4	谦比希东南	浸染状		磁黄铁矿		0.566		0.008		-		0.321		37.903		0.004		-		-		0.003		0.004		59.246		0.43		0.038	0.019	-	98.542
QBXDN-5-1-1	谦比希东南	脉状		黄铁矿		0.556		0.018		-		0.461		53.614		-		-		0.007		0.001		-		41.865		4.619		-	0.005	-	101.146
QBXDN-5-1-2	谦比希东南	脉状		黄铁矿		1.073		0.012		-		0.425		53.654		0.004		0.084		0.008		-		0.02		41.493		4.943		-	-	0.007	101.723
QBXDN-5-1-3	谦比希东南	脉状		黄铁矿		0.717		-		0.005		0.433		53.556		-		-		-		-		-		42.577		4.349		-	0.01	-	101.647
QBXDN-5-2-5	谦比希东南	脉状		黄铁矿		0.365		0.017		0.013		0.458		53.806		0.005		-		-		0.034		-		42.531		4.406		0.034	0.023	-	101.692
QBXDN-5-2-6	谦比希东南	脉状		黄铁矿		0.516		-		-		0.437		53.73		-		-		-		0.008		-		42.667		3.783		0.001	0.016	0.069	101.227
QBXDN-5-2-7	谦比希东南	脉状		黄铁矿		0.272		-		-		0.426		53.318		0.017		-		-		0.002		-		42.207		4.489		-	-	-	100.731
QBXDN-5-3-8	谦比希东南	脉状		黄铁矿		0.327		-		0.01		0.455		53.869		0.004		-		-		-		-		41.877		4.357		0.003	0.042	0.04	100.984
QBXDN-18-1-1	谦比希东南	浸染状		黄铁矿		0.346		-		-		0.452		54.199		0.01		-		-		0.016		0.003		46.566		0.069		-	0.017	0.038	101.716
QBXDN-18-1-2	谦比希东南	浸染状		黄铁矿		0.348		0.031		0.038		0.467		54.949		0.001		-		-		0.017		-		47.284		0.056		0.051	0.063	0.031	103.336
QBXDN-18-2-4	谦比希东南	浸染状		黄铁矿		0.38		-		-		0.454		55.32		-		-		0.013		-		-		46.682		0.075		0.044	0.206	0.017	103.191
QBXDN-18-2-5	谦比希东南	浸染状		黄铁矿		0.448		0.02		-		0.493		54.916		0.003		-		-		-		0.003		46.927		0.067		-	0.252	0.08	103.209
QBXDN-1-2-13	谦比希东南	层状/脉状		硫钴矿		0.039		0.009		0.01		0.278		32.133		-		-		0.003		0.009		0.023		4.967		59.923		3.532	0.012	-	100.938
QBXDN-1-2-14	谦比希东南	层状/脉状		硫钴矿		0.023		-		-		0.313		32.914		-		0.017		0.018		-		0.002		4.834		60.251		2.813	0.05	-	101.235
QBXDN-4-1-1	谦比希东南	团块状		硫钴矿		0.018		0.036		-		0.322		32.713		-		0.012		0.034		-		-		4.926		60.688		2.728	0.021	-	101.498
QBXDN-4-1-5	谦比希东南	团块状		硫钴矿		0.014		0.043		-		0.286		33.23		0.001		-		-		-		0.01		4.675		61.517		2.329	-	-	102.105
QBXDN-19-1-2	谦比希东南	浸染状		硫钴矿		0.064		0.032		-		0.269		31.96		0.008		0.006		-		0.003		0.002		7.696		57.328		0.491	-	-	97.859
QBXDN-19-2-6	谦比希东南	浸染状		硫钴矿		0.01		0.086		-		0.507		40.601		-		0.01		0.004		-		-		2.46		48.232		3.348	2.825	-	98.083
QBXDN-1-2-12	谦比希东南	层状/脉状		硫铜钴矿		0.096		0.028		0.028		0.272		30.611		0.008		-		-		0.019		-		8.58		45.879		2.243	8.742	-	96.506
QBXX-3-1-1	谦比希西	团块状		硫铜钴矿		-		-		-		0.358		41.828		0.02		0.01		-		-		0.017		0.154		44.336		0.833	12.949	-	100.505
QBXX-8-1-1	谦比希西	团块状		硫铜钴矿		-		0.014		0.024		0.331		42.286		0.004		-		0.034		-		0.008		0.15		44.085		1.552	12.388	-	100.876
QBXX-10-1-1	谦比希西	团块状		硫铜钴矿		0.015		0.028		0.012		0.36		39.73		0.017		-		0.025		-		-		1.233		37.021		2.469	18.378	-	99.288
QBXX-10-2-3	谦比希西	团块状		硫铜钴矿		0.003		0.023		-		0.329		41.656		0.003		-		0.025		0.021		-		0.173		43.378		2.155	13.117	-	100.883
QBXX-10-2-4	谦比希西	团块状		硫铜钴矿		-		0.007		-		0.337		41.895		0.001		0.001		0.003		0.011		0.006		0.065		43.571		2.3	12.611	-	100.808

矿体	样品号	矿石构造	矿物	δ³⁴S_V-CDT/‰
谦比希西	QBXX-1	团块状	斑铜矿	6.9
谦比希西	QBXX-3	团块状	斑铜矿	6.7
谦比希西	QBXX-5	团块状	斑铜矿	6.0
谦比希西	QBXX-7	团块状	斑铜矿	6.5
谦比希东南	QBXDN-1	脉状	磁黄铁矿	8.0
谦比希东南	QBXDN-5	脉状	磁黄铁矿	10.9
谦比希东南	QBXDN-10	脉状	磁黄铁矿	12.6
谦比希东南	QBXDN-12	脉状	磁黄铁矿	11.2
谦比希东南	QBXDN-16	脉状	磁黄铁矿	7.2

矿体	样品号	矿石构造	矿物	δ³⁴S_V-CDT/‰
谦比希西	QBXX-1	团块状	斑铜矿	6.9
谦比希西	QBXX-3	团块状	斑铜矿	6.7
谦比希西	QBXX-5	团块状	斑铜矿	6.0
谦比希西	QBXX-7	团块状	斑铜矿	6.5
谦比希东南	QBXDN-1	脉状	磁黄铁矿	8.0
谦比希东南	QBXDN-5	脉状	磁黄铁矿	10.9
谦比希东南	QBXDN-10	脉状	磁黄铁矿	12.6
谦比希东南	QBXDN-12	脉状	磁黄铁矿	11.2
谦比希东南	QBXDN-16	脉状	磁黄铁矿	7.2

中非赞比亚成矿带谦比希铜钴矿床钴的赋存状态与成矿规律

Cobalt occurrence and ore-forming process in the Chambishi deposit in the Zambian Copperbelt, Central Africa

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