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Trace element distribution and geochemical zonation in the world-class Nowa Sól sediment-hosted Cu-Ag deposit, SW Poland
Mineralium Deposita ( IF 4.4 ) Pub Date : 2022-04-21 , DOI: 10.1007/s00126-022-01110-6
Tomasz Bieńko 1 , Alicja Pietrzela 1
Affiliation  

More than 200 samples from sediment-hosted Lower Zechstein Cu-Ag series of the newly discovered Nowa Sól deposit (SW Poland) were studied in order to determine spatial and vertical correlations between the metals. On the basis of obtained metal distribution, the investigated deposit can be subdivided into two parts. Rare earth elements and gold concentrations are elevated in the southwestern part of the deposit, close to the Rote Fäule area. Silver cobalt, rhenium, lead, and zinc are concentrated in a wide polymetallic zone in the northeastern part of the deposit. The concentration patterns of most metals are controlled by the distance from the Zielona Góra oxidized field. Copper content does not vary significantly across the deposit. The contents of molybdenum, nickel, and vanadium seem to depend on the lithotype rather than on broader metal distribution. In general, the highest ore grades are observed in the organic-rich variety of the Kupferschiefer, in the uppermost mineralized Weissliegend, and in the base of the Zechstein limestone. Metal zonation of the Nowa Sól deposit can be drawn in the following order from southwest to northeast: (1) Au-rare earth element (REE)-bearing transitional zone, (2) REE-enriched Cu-bearing reduced zone, (3) Ag-Re-Co-enriched Cu-bearing reduced zone, (4) Pb-Ag-Co-enriched Cu-bearing reduced zone, and (5) Pb-bearing reduced zone. Distribution of metals across the investigated area supports an epigenetic model involving multistage and fault-controlled ore-forming processes. It is plausible that the volume, temperature, chemical composition, and time of activity of the metalliferous fluids have differed across the northern part of the Fore-Sudetic Monocline. The polymetallic Nowa Sól deposit, hosting estimated, inferred, and indicated resources of 10.6 Mt of Cu and 36.4 kt of Ag, is part of a broader mineralized trend. The deposit is open towards the west and northwest; the prognostic area with hypothetical resources, covering more than 500 km2 has been delineated in the northwestern part of the Fore-Sudetic Monocline, where at least 50 Mt of Cu and 120 kt of Ag can still be discovered and documented.



中文翻译:

波兰西南部世界级 Nowa Sól 沉积铜银矿床中的微量元素分布和地球化学分带

为了确定金属之间的空间和垂直相关性,研究了新发现的 Nowa Sól 矿床(波兰西南部)的沉积物承载的 Lower Zechstein Cu-Ag 系列的 200 多个样品。根据获得的金属分布,所调查的矿床可分为两部分。矿床西南部靠近Rote Fäule地区的稀土元素和金浓度较高。银钴、铼、铅和锌集中在矿床东北部广阔的多金属带中。大多数金属的浓度模式由与 Zielona Góra 氧化场的距离控制。铜含量在整个矿床中没有显着变化。钼、镍的含量,钒似乎取决于岩型而不是更广泛的金属分布。一般来说,在富含有机物的 Kupferschiefer 品种、最上部的矿化 Weissliegend 和 Zechstein 石灰岩的底部观察到最高的矿石品位。Nowa Sól 矿床的金属分带从西南向东北可按以下顺序绘制:(1) 含金稀土元素 (REE) 过渡带,(2) 富含稀土元素的含铜还原带,(3)富Ag-Re-Co 含Cu 还原区,(4) 富Pb-Ag-Co 含Cu 还原区,和(5) 含Pb 还原区。整个调查区域的金属分布支持涉及多阶段和断层控制的成矿过程的表观成因模型。体积、温度、化学成分、Fore-Sudetic Monocline 北部的含金属流体的活动时间和活动时间不同。多金属 Nowa Sól 矿床拥有 10.6 吨铜和 36.4 千吨银的估计、推断和指示资源,是更广泛矿化趋势的一部分。矿床向西和西北开放;具有假设资源的预测区域,覆盖 500 多公里2已在 Fore-Sudetic Monocline 的西北部划定,在那里仍然可以发现和记录至少 50 Mt 的 Cu 和 120 kt 的 Ag。

更新日期:2022-04-21
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