ABSTRACT The presence of the critical and sought-after (semi-)metals gallium (Ga) and germanium (Ge) has previously been reported from mineralisations in the Bergslagen ore province, south central Sweden. Some of these reports were however recently shown to be questionable or erroneous. Here we summarise early analytical work on these metals in mineral deposits of the Bergslagen province, as well as briefly report new analytical data for Ga and Ge from recent, in part on-going work on different mineralisation types. The new data show that the sampled sulphide and iron oxide mineralisations in the Bergslagen province are overall not particularly enriched in Ga, and even less so with regards to Ge. One major exception is the significant Ga enrichment observed in skarn-hosted Fe-REE(-polymetallic) deposits of Bastnäs type. Notably, these mineralisations also host increased contents of Ge. Based on this broader suite of sampled deposits, the suggested correlation between Ga and Al contents in previously studied material with relatively increased Ga grades, is in part contradicted, indicating that Ga is only in part sequestered through straightforward Al-substitution into aluminium silicate and oxide minerals. The mineralisations that do exhibit significantly increased Ge contents, in addition to the Bastnäs-type deposits, are represented by both sulphide-dominated ones and Fe (-Mn) oxide-rich systems.

中文翻译：

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瑞典 Bergslagen 矿区镓和锗的赋存

摘要 此前曾有报道称，瑞典中南部 Bergslagen 矿区的矿化中存在重要且备受追捧的（半）金属镓 (Ga) 和锗 (Ge)。然而，其中一些报告最近被证明是有问题的或错误的。在这里，我们总结了对 Bergslagen 省矿床中这些金属的早期分析工作，并简要报告了近期对不同矿化类型进行的部分正在进行的工作中 Ga 和 Ge 的新分析数据。新数据显示，在 Bergslagen 省取样的硫化物和氧化铁矿化总体上并未特别富含 Ga，而 Ge 含量更低。一个主要的例外是在 Bastnäs 型含矽卡岩的 Fe-REE（-多金属）矿床中观察到显着的 Ga 富集。尤其，这些矿化还含有增加的锗含量。基于这一更广泛的采样沉积物，先前研究的 Ga 品位相对增加的材料中 Ga 和 Al 含量之间的建议相关性部分是矛盾的，这表明 Ga 仅部分通过直接的 Al 替代隔离成硅酸铝和氧化物矿物质。除了 Bastnäs 型矿床外，确实表现出显着增加的 Ge 含量的矿化以硫化物为主的矿化和富含 Fe (-Mn) 氧化物的系统为代表。表明 Ga 仅通过直接的 Al 替代部分隔离到硅酸铝和氧化物矿物中。除了 Bastnäs 型矿床外，确实表现出显着增加的 Ge 含量的矿化以硫化物为主的矿化和富含 Fe (-Mn) 氧化物的系统为代表。表明 Ga 仅通过直接的 Al 替代部分隔离到硅酸铝和氧化物矿物中。除了 Bastnäs 型矿床外，确实表现出显着增加的 Ge 含量的矿化以硫化物为主的矿化和富含 Fe (-Mn) 氧化物的系统为代表。