Data and supporting information for: From source rock to cinnabar – how the giant mercury deposits in earth’s crust formed

The largest concentrations of Hg on Earth exist as giant deposits of cinnabar (HgS). How such enrichments of Hg formed, based on its known crustal abundance has never been fully resolved, nor has the source(s) of Hg been unequivocally established. Hg isotopes were used to elucidate crustal processes leading to the concentration of Hg during thermal maturation of Hg and organic matter enriched sediments and cinnabar formation. Mass dependent fractionation (MDF) of Hg isotopes shows remarkable enrichment of 202Hg in cinnabar relative to its upper mantle source. Two mechanisms contribute to this enrichment: one is the low temperature, early diagenetic loss of volatile 198Hg0(g) to an extant gas phase; the other is oxidation during cinnabar deposition. Loss of 198Hg0(g) results in 202Hg enrichment of Hg in residual organic matter in source sediments. Evidence for this significant loss of 198Hg0(g) is observed as large depletions in the δ202Hg isotopic composition of proximal gas condensate ..., , # Data and supporting information for: From source rock to cinnabar – how the giant mercury deposits in earth’s crust formed

Dataset DOI: [10.5061/dryad.2547d7x5j](https://doi.org/10.5061/dryad.2547d7x5j)

**This Data and Supporting Information file** **(AJS_FINAL_D_SI.pdf)** **includes the following sections:**

**Mercury isotopes**: Includes a brief description of nomenclature used in reporting both mass dependent and mass independent mercury isotopic data, together with a detailed description of laboratory and analytical procedures used in sample preparation and analysis of mercury isotopic composition in natural mercury-bearing samples discussed in this study.

**Table S1:** MC-ICP-MS operating parameters and measurement conditions for isotope ratio measurements.

**Supporting references**

**Hg isotope data for cinnabar from each deposit discussed in this study**

Hg isotope data for each deposit were compiled from previously published studies, and together with a short summary of...,

地球上汞（Hg）的最大富集体均以辰砂（cinnabar, HgS）巨型矿床的形式存在。基于汞已知的地壳丰度，这类汞富集现象的形成机制至今尚未完全阐明，其物质来源也尚未得到明确界定。研究团队利用汞同位素技术，阐明了在汞与富有机质沉积物热成熟过程中，以及辰砂形成过程中，导致汞富集的地壳作用过程。汞同位素的质量分馏（Mass dependent fractionation, MDF）显示，相较于上地幔源区，辰砂中的202Hg呈现出显著的富集。这一富集由两种机制共同促成：其一为低温早期成岩作用阶段，挥发性198Hg0(g)通过逸散进入现存气相而流失；其二为辰砂沉积过程中的氧化作用。198Hg0(g)的逸散流失会导致源沉积物中残余有机质内的汞发生202Hg富集。这种198Hg0(g)的显著流失现象，可通过近端天然气凝析物的δ202Hg同位素组成大幅亏损得到佐证。
# 数据与补充信息：从烃源岩到辰砂——地壳巨型汞矿床的形成机制
Dataset DOI: [10.5061/dryad.2547d7x5j](https://doi.org/10.5061/dryad.2547d7x5j)

**本数据与补充信息文件（AJS_FINAL_D_SI.pdf）包含以下章节：**
**汞同位素**：涵盖了报道质量依赖型与质量非依赖型汞同位素数据时所采用的命名规则简要说明，同时详细描述了本研究中涉及的天然含汞样品的前处理、汞同位素组成分析所用的实验室流程与分析方法。
**附表S1**：用于同位素比值测定的多接收电感耦合等离子体质谱（MC-ICP-MS）工作参数与测量条件。
**支撑参考文献**
**本研究涉及各矿床辰砂的汞同位素数据**
各矿床的汞同位素数据均整合自已发表的研究成果，并辅以简短综述……