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- W4387109670 abstract "新桥矿床是长江中下游成矿带铜陵矿集区内典型的大型层控矽卡岩型铜金硫多金属矿床。矿床成矿过程中除了铜、金、铁、硫等主要成矿元素富集成矿以外,钴、硒、碲等关键金属元素也以伴生形式产生了不同程度的富集。前人对新桥矿床开展了大量研究工作,但对矿床中关键金属钴、硒、碲的分布规律、赋存状态和富集机制等方面系统研究尚未开展。本次研究在新桥矿床系统采集距离成矿岩体不同位置的两条代表性剖面(3804、E601)的岩矿石样品,通过光学显微镜观察、扫描电子显微镜、全岩主微量元素化学分析和矿物原位LA-ICP-MS微量成分测试等分析技术方法,查明了矿床中钴、硒、碲等关键金属的空间分布规律和赋存状态,初步探讨了钴、硒、碲的富集机制。新桥矿床中估算伴生Co、Se、Te资源量分别为:2326t、2590t、1463t,达到大-中型规模。近成矿(热)中心3804剖面Co、Se含量自矿体底板→顶板呈逐渐降低的趋势,Te含量变化没有明显规律,Co、Se、Te均主要在黄铁矿矿石中产生富集;远成矿(热)中心E601剖面上Co、Se、Te含量自矿体底板→顶板均呈逐渐降低的趋势,且主要富集高品位黄铁矿矿石中。矿体走向上自成矿(热)中心→远端,Co含量明显降低,Se、Te含量相对增高。矿床中Co、Se主要以类质同象置换的形式赋存于黄铁矿中,Te的赋存状态以独立碲矿物为主,包括辉碲铋矿和碲银矿。Co主要在石英-硫化物阶段产生富集,成矿流体温度较高,流体中Co大部分随黄铁矿沉淀富集于近成矿(热)中心的黄铁矿矿石中,至碳酸盐-硫化物阶段,成矿流体温度降低,流体中Se、Te大部分沉淀富集于远成矿(热)中心的高品位黄铁矿矿石中,其中Se主要随黄铁矿大量沉淀富集,Te较少进入黄铁矿等硫化物中,主要以独立矿物的形式产出。" @default.
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- W4387109670 date "2023-01-01" @default.
- W4387109670 modified "2023-10-11" @default.
- W4387109670 title "Study on the spatial distribution, occurrence and enrichment of Co-Se-Te in the Xinqiao deposit of Tongling ore cluster, Anhui Province" @default.
- W4387109670 doi "https://doi.org/10.18654/1000-0569/2023.10.11" @default.
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