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首页> 外文期刊>Geological Journal >Source and evolution of the Luanling gold deposit in the Xiong'ershan region, western Henan Province: Constraints from pyrite trace elements, in situ sulfur isotopes, and He-Ar isotopes
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Source and evolution of the Luanling gold deposit in the Xiong'ershan region, western Henan Province: Constraints from pyrite trace elements, in situ sulfur isotopes, and He-Ar isotopes

机译：河南省熊爱山区滦岭金矿床的来源与演变：来自硫铁矿微量元素的限制，原位硫同位素和He-Ar同位素

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摘要

The Luanling gold deposit is a lode gold deposit in the Xiong'ershan region located on the southern margin of the North China Craton. Based on typical mineral assemblages and relative Au contents, the pyrites in the Luanling deposit can be divided into four types: Py1-s, pyrite with abnormally high levels of Au in pyrite-quartz veins; Py1, pyrite with low levels of Au in pyrite-quartz veins; Py2-1, pyrite intergrowth with molybdenite; and Py2-2, pyrite with higher concentrations of Au in association with molybdenite. Inductively coupled plasma mass spectrometry analyses reveal that the gold mainly occurs as "visible gold" (either native gold or electrum) inclusions and disseminations. "Invisible gold" is only hosted in the Py2-2 pyrite grains, and Py1 and Py2-1 contain low levels of Au concentrations (Py1 <= 6.563 ppm; Py2-1 <= 8.377 ppm). Interestingly, As shows a strong correlation with gold concentrations in Py2-2. The delta S-34 values of Py1 from Stage I span from -7.4 parts per thousand to -5.1 parts per thousand. At Stage II, the delta S-34 values of Py2-1 exhibit a range of -11.0 parts per thousand to -7.5 parts per thousand. Pyrite in Py2-2 shows delta S-34 values from -12.6 parts per thousand to -11.0 parts per thousand. In situ sulfur isotope analyses of pyrite show an obvious decreasing trend, which is a result decreasing ore-forming temperatures during the ore-forming process. The He-Ar isotope data indicate that the ore-forming fluids were derived from a mantle-fluid mixing source. The metallogenesis in the Luanling deposit is closely related to the lithospheric thinning and the destruction of the North China Craton.
机译：滦岭金矿床是雄园地区的洛德金矿床，位于华北克拉顿南部边缘。基于典型的矿物组合和相对的Au含量，滦脉沉积物中的硫铁矿可分为四种类型：py1-s，黄铁矿，在黄铁矿 - 石英静脉中具有异常高水平的au; Py1，硫铁矿含量低水平的硫酸盐 - 石英静脉; Py2-1，用钼族聚糖凝聚;和Py2-2，含有较高浓度Au的黄铁矿与钼酸盐。电感耦合等离子体质谱分析显示，金色主要发生为“可见金”（原生金或电酶）夹杂物和散发。 “隐形金”仅托管在py2-2硫铁矿谷物中，Py1和py2-1含有低水平的Au浓度（py1 <= 6.563ppm; py2-1 <= 8.377ppm）。有趣的是，正如Py2-2中的金色浓度强烈相关。 PY1的Delta S-34来自i阶段的PY1的值跨越-7.4份千分之一到-5.1份千分之一。在第II阶段，PY2-1的Delta S-34值表现出-11.0份千分之一至-7.5份千分之一。 Py2-2中的黄铁矿显示了从-12.6份千分之一到-11.0份千分之一的Δ-34值。原位硫磺同位素分析黄铁矿分析显示出明显的降低趋势，这是在成矿过程中形成矿石形成温度的结果。 HE-AR同位素数据表明，形成矿石流体衍生自搭式混合源。滦岭矿床中的成矿与岩石树脂稀疏和华北克拉顿的破坏密切相关。

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