湘东北矿集区井冲铜钴矿床钴的赋存状态

康博; 宁钧陶; 高卓龙; 唐狮象; 邓冠鹏; 刘文浩; 孙华山; 江满容; 俎波

doi:10.19509/j.cnki.dzkq.tb20240724

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湘东北矿集区井冲铜钴矿床钴的赋存状态

更新时间：2026-11-05

- 湘东北矿集区井冲铜钴矿床钴的赋存状态
- Bulletin of Geological Science and Technology Vol. 44, Issue 4, Pages: 167-184(2025)
- 作者机构：
  
  1. 湖南省地质灾害调查监测所
  2. 浏阳市鑫磊矿业开发有限公司
  3. 中国地质大学(武汉)资源学院
- 作者简介：
- 基金信息：
- DOI：10.19509/j.cnki.dzkq.tb20240724
  CLC： P618.62;P618.41
- Online First：24 June 2025，
  
  Published：24 June 2025
- 稿件说明：
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康博, 宁钧陶, 高卓龙, et al. 湘东北矿集区井冲铜钴矿床钴的赋存状态[J]. Bulletin of Geological Science and Technology, 2025, 44(4): 167-184.
DOI：

康博, 宁钧陶, 高卓龙, et al. 湘东北矿集区井冲铜钴矿床钴的赋存状态[J]. Bulletin of Geological Science and Technology, 2025, 44(4): 167-184. DOI： 10.19509/j.cnki.dzkq.tb20240724.

摘要

湘东北矿集区井冲铜钴矿床蕴含中型规模的钴资源量，但目前对钴的赋存状态和铜钴成矿关系尚不完全清楚。在详细的坑道调查基础上，结合显微镜鉴定、微区X射线荧光扫描分析（μ-XRF）扫面、背散射电子成像（BSE）及电子探针定量分析，详细划分了成矿阶段，开展了钴的赋存状态和铜钴成矿关系研究，在此基础上提出了钴的综合利用建议。结果表明，井冲铜钴矿床钴的赋存形式包括两大类，第一大类为赋存于粗粒黄铁矿中的不可见钴，钴是以溶解-再沉淀方式进入粗粒黄铁矿内部；第二大类为独立的辉砷钴矿，又细分为4种不同的赋存形式，分别为：以镶边结构或穿插结构产于粗粒黄铁矿边缘或内部的辉砷钴矿、产于粗粒黄铁矿内部多孔状部位边缘的辉砷钴矿、产于粗粒黄铁矿旁边石英中的细粒辉砷钴矿-黄铁矿集合体、产于石英生长环带中定向展布的细粒辉砷钴矿-黄铁矿集合体。从钴资源量贡献来看，粗粒黄铁矿中的不可见钴占据主导地位。此外，在成矿顺序上，钴成矿发生在热液期的中阶段，而铜成矿发生在热液期的晚阶段，铅锌成矿与铜成矿近于同时或稍晚。由于辉砷钴矿含量较少且粒径主体小于30μm，常规的选矿磨细度难以使其分离，因此钴综合利用的重点应该放在含钴的黄铁矿上。未来研究建议进一步圈定富钴矿体，优化选矿工艺，有望提升硫精矿中的钴品位，以实现钴的综合利用。

Abstract

ObjectiveThe Jingchong copper-cobalt deposit

located in the ore-concentration area of northeastern Hunan Province

contains medium-scale cobalt resources. However

the cobalt occurrence and the relationship between copper and cobalt mineralization remian unclear. MethodsBased on detailed underground mine investigations

combined with microscopic observation

μ-XRF scanning

backscattered electron imaging (BSE)

and electron probe quantitative analysis

the mineralization stages were divided

and the cobalt occurrence and the relationship between copper and cobalt mineralization were studied. We proposed the comprehensive utilization of cobalt . ResultsThe results indicate that the cobalt occurrence in the Jingchong copper-cobalt deposit can be classified into two major categories. The first category consists of invisible cobalt hosted in coarse-grained pyrite

where cobalt enters the interior of coarse-grained pyrite through a dissolution-reprecipitation process. The second category is the independent cobaltite mineral

which is further subdivided into four different occurrences: cobaltite occurring as a rim or interstitial texture along the margins or within the interior of coarse-grained pyrite; cobaltite located at the edge of the porous within coarse-grained pyrite; fine-grained cobaltite-pyrite aggregates hosted in quartz adjacent to the coarse-grained pyrite; and fine-grained cobaltite-pyrite aggregates oriented and distributed in the quartz growth bands. In terms of cobalt resource contribution

invisible cobalt in coarse-grained pyrite dominates. Additionally

the mineralization sequence indicates that cobalt mineralization mainly occurs in the intermediate stage of the hydrothermal period

while copper mineralization occurs in the late stage

and lead-zinc mineralization is nearly simultaneous with or slightly later than copper mineralization. ConclusionDue to the relatively low content of cobaltite minerals and its grain size predominantly less than 30 μm

conventional mineral processing fineness is difficult to effectively separate them. Therefore

the focus of comprehensive cobalt utilization should be on the coarse-grained cobalt-rich pyrite. The delineation of cobalt-rich ore bodies and the optimization of beneficiation process could potentially enhance the cobalt grade in sulfide concentrates and achieve comprehensive cobalt utilization.

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