Pb–Zn mineralization at Rajpura-Dariba and Zawarmala, India, is hosted in the Palaeoproterozoic meta-volcano-sedimentary sequence of Aravalli-Delhi Belt. We have studied different generations of pyrite (Py-I, II and III) and sphalerite (Sph-I, II and III), associated with ore mineralization and remobilization stages, from both the deposits. In Rajpura-Dariba, high concentrations of the majority of trace elements in syngenetic Py-I and Sph-I suggest their formation from trace element enriched hydrothermal fluid in SEDEX environment. Enrichment of lattice bound elements in Py-II (As, Co, Ni) and Sph-II (Mn, Hg and Cd) during metamorphic recrystallization of early pyrite and sphalerite indicates their local derivation from host rocks. The Pb, Tl, Ag and Sb rich Py-III and Sph-III in discordant ore indicate their crystallization from low melting-point chalcophile elements enriched sulfide melt. In Zawarmala, the trace element poor natures of diagenetic banded Py-I and Sph-I suggest that the initial ore-forming fluid was depleted in trace elements. Enrichment of trace elements in Py-II (As, Mn, Tl, Cu) and Sph-II (Mn, Hg, As, Ga) in sphalerite-pyrite vein ore signify their derivation from carbonate host rocks. The high abundance of trace elements in Py-III and Sph-III indicates their precipitation at lower temperatures from a trace element enriched hydrothermal fluid during the massive galena-sphalerite ore formation. Pyrite and sphalerite from global SEDEX are trace elements enriched as compared to MVT deposits, where their compositions have remarkably correlation with host rocks. Our study highlights the influence of host rock in pyrite and sphalerite compositions and their ore genetic implications.

中文翻译：

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印度西北部 Rajpura-Dariba 和 Zawarmala 铅锌矿床的黄铁矿和闪锌矿组成的矿石成因意义

印度 Rajpura-Dariba 和 Zawarmala 的 Pb-Zn 矿化位于 Aravalli-Delhi 带的古元古代变火山沉积序列中。我们研究了不同世代的黄铁矿（Py-I、II 和 III）和闪锌矿（Sph-I、II 和 III），它们与这两个矿床的矿石成矿和再活化阶段有关。在 Rajpura-Dariba，同生 Py-I 和 Sph-I 中大多数微量元素的高浓度表明它们是由 SEDEX 环境中富含微量元素的热液形成的。在早期黄铁矿和闪锌矿的变质再结晶过程中，Py-II（As、Co、Ni）和 Sph-II（Mn、Hg 和 Cd）中晶格结合元素的富集表明它们来自母岩的局部衍生。铅、铊、不和谐矿石中富含 Ag 和 Sb 的 Py-III 和 Sph-III 表明它们是从富含低熔点嗜热元素的硫化物熔体中结晶出来的。在Zawarmala，成岩带状Py-I和Sph-I的微量元素贫乏性质表明初始成矿流体中微量元素被耗尽。闪锌矿-黄铁矿脉矿石中微量元素 Py-II（As、Mn、Tl、Cu）和 Sph-II（Mn、Hg、As、Ga）的富集表明它们来源于碳酸盐母岩。Py-III 和 Sph-III 中微量元素的高丰度表明它们在大量方铅矿-闪锌矿形成过程中从富含微量元素的热液流体中在较低温度下沉淀。与 MVT 矿床相比，来自全球 SEDEX 的黄铁矿和闪锌矿是富集的微量元素，它们的成分与母岩具有显着的相关性。