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Chalcopyrite, sphalerite, and pyrite chemistry in stratiform sediment-hosted Cu(-Co) metallogenic districts: trace element characteristics and factors controlling polymetallic mineralization
Mineralium Deposita ( IF 4.4 ) Pub Date : 2024-10-12 , DOI: 10.1007/s00126-024-01320-0
Viktor Bertrandsson Erlandsson, Krzysztof Foltyn, Philippe Muchez, Gerd Rantitsch, Rainer Ellmies, Frank Melcher

Stratiform sediment-hosted Cu deposits are significant global sources of Cu and other important metals. The Polish Kupferschiefer produces Ag, Au, Pb, Ni, Se, and Re as by-products, whereas Co is one the of most important metals in the stratiform sediment-hosted Cu-Co deposits of the Central African Copperbelt and the Namibian Dolostone Ore Formation deposit. This study combines new and published laser ablation inductively coupled plasma mass spectrometry sulfide trace element data from these stratiform sediment-hosted copper districts. All the investigated districts exhibit sulfides occurring as disseminations and within later veins. Chalcopyrite, sphalerite, and pyrite trace element contents vary significantly between the metallogenic districts as well as between different ore stages. Random Forest discriminates the stratiform sediment-hosted Cu(-Co) districts based on trace element geochemistry. High Ag and Tl in chalcopyrite is attributed to the Polish Kupferschiefer, Ga and Ge to the Katanga Copperbelt, and Zn and In to the Dolostone Ore Formation deposit. Sphalerite from the Polish Kupferschiefer and the Dolostone Ore Formation deposit can be distinguished on the basis of the Fe and Cd contents. Cobalt and As are significantly elevated in pyrite from the Katanga Copperbelt and Mn in pyrite from the Dolostone Ore Formation deposit. The trace element contents also show that the stratiform sediment-hosted Cu(-Co) deposit sulfide data cluster separately from other deposit types. The variation in sulfide trace element contents between the three investigated stratiform sediment-hosted Cu(-Co) districts suggests that sulfide chemistry is related to the geology of the host basin and the nature of the underlying basement, which includes preexisting ore occurrences.



中文翻译:


层状沉积物赋存的 Cu(-Co) 成矿区的黄铜矿、闪锌矿和黄铁矿化学:微量元素特征和控制多金属矿化的因素



层状沉积物承载的铜矿床是铜和其他重要金属的全球重要来源。波兰 Kupferschiefer 生产 Ag、Au、Pb、Ni、Se 和 Re 作为副产品,而 Co 是中非铜矿带和纳米比亚白云岩矿床的层状沉积物承载的 Cu-Co 矿床中最重要的金属之一。本研究结合了来自这些层状沉积物承载的铜区的新和已发表的激光烧蚀电感耦合等离子体质谱硫化物痕量元素数据。所有调查的地区都表现出硫化物以传播形式和后来的矿脉内发生。黄铜矿、闪锌矿和黄铁矿微量元素含量在成矿区之间以及不同矿石阶段之间差异很大。随机森林根据微量元素地球化学区分层状沉积物承载的 Cu(-Co) 区。黄铜矿中的高 Ag 和 Tl 产自波兰 Kupferschiefer,Ga 和 Ge 产于加丹加铜矿带,Zn 和 In 产于白云石矿层矿床。来自波兰 Kupferschiefer 和 Dolostone 矿层矿床的闪锌矿可以根据 Fe 和 Cd 含量进行区分。加丹加铜矿带的黄铁矿中的钴和砷含量显著升高,白云石矿层矿床的黄铁矿中的锰含量显著升高。微量元素含量还显示,层状沉积物承载的 Cu(-Co) 矿床硫化物数据与其他矿床类型分开聚集。三个研究的层状沉积物赋存的 Cu(-Co) 矿区之间硫化物微量元素含量的变化表明,硫化物化学与主盆地的地质和下伏基底的性质有关,其中包括先前存在的矿石矿床。

更新日期:2024-10-12
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