Fluid inclusion composition reveals mineralization potential of the Mogutu skarn deposit, NE China

IF 4.3 2区地球科学 Q1 GEOLOGY

Ore Geology Reviews Pub Date : 2026-03-01 Epub Date: 2026-02-14 DOI:10.1016/j.oregeorev.2026.107178

Yixin Li , Qihai Shu , Zifeng He , Xudong Niu , Jiajun Liu , Siyuan Liu , Shuqi Wen

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Abstract

The growing global demand for mineral resources underscores the increasing importance of intrusion-related hydrothermal deposits as the major sources of numerous metals such as Cu, Mo, Sn, and W. While magmatic-hydrothermal systems are widespread, determining their ore-forming capability and establishing methods to assess their potential remain key challenges for mineral exploration. Ore-related fluids trapped in fluid inclusions at relatively high temperatures predating mineralization preserve the pristine geochemical signatures of magmatic exsolution, serving as an ideal tool for addressing the above issues. In this study, the fluid inclusions in the pegmatite quartz from an Early Cretaceous alkali-feldspar granite, the causative intrusion of the Mogutu skarn deposit in NE China, were analyzed using laser ablation-inductively coupled plasma-mass spectrometry. The results have been used to demonstrate how fluid compositions can be applied to evaluate the fertility of the hydrothermal system. The Mogutu fluids exhibit elevated concentrations of Sn (560 ppm) and Ag (78 ppm) compared to Sn- or Ag-barren systems, but are depleted in Cu (540 ppm) relative to typical Cu-mineralized systems. The concentrations of Fe (3.2 wt%), Zn (5,700 ppm), and Pb (2,950 ppm) are comparable to both those Fe/Zn-Pb deposits and barren systems. The results align with the occurrence of economic Sn-Ag ores in the Mogutu skarn, while the Fe mineralization likely benefited significantly from an additional contribution from the Fe-rich wallrocks (e.g., andesite). Mass balance calculation further reveals the high endowment of Zn-Pb but low W-Mo, consistent with the widespread Zn-Pb ores but no W-Mo mineralization in Mogutu and the surrounding region. This study demonstrates that fluid inclusion composition is a reliable geochemical indicator for assessing mineralization potential, thereby enhancing predictive accuracy in magmatic-hydrothermal prospectivity.

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流体包裹体组成揭示了中国东北木古图夕卡岩矿床的成矿潜力

随着全球对矿产资源需求的不断增长，与侵入体相关的热液矿床作为铜、钼、锡和钨等多种金属的主要来源日益重要。岩浆热液系统分布广泛，确定其成矿能力并建立评估其潜力的方法仍然是矿产勘探的关键挑战。成矿前相对高温下包裹体中的含矿流体保存了岩浆溶蚀的原始地球化学特征，是解决上述问题的理想工具。本文采用激光烧蚀-电感耦合等离子体质谱分析了中国东北莫古图矽卡岩矿床成因侵入物——早白垩世碱长石花岗岩伟晶岩石英中的流体包裹体。这些结果已被用来证明如何应用流体成分来评估热液系统的肥力。Mogutu流体中Sn （560ppm）和Ag （78ppm）的含量高于无锡或无银体系，但Cu （540ppm）含量低于典型的铜矿化体系。铁（3.2 wt%）、锌（5700 ppm）和铅（2950 ppm）的浓度与这些铁/锌-铅矿床和贫瘠体系相当。结果与Mogutu矽卡岩中存在经济的Sn-Ag矿石相一致，而铁矿化可能受益于富铁围岩（如安山岩）的额外贡献。质量平衡计算进一步揭示了木古图及周边地区锌铅赋存量高、W-Mo赋存量低的特征，与该区广泛存在锌铅矿而W-Mo矿化不明显相吻合。研究表明，流体包裹体组成是评价成矿潜力的可靠地球化学指标，可提高岩浆-热液找矿预测精度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ore Geology Reviews 地学-地质学

CiteScore

6.50

自引率

27.30%

发文量

546

审稿时长

22.9 weeks

期刊介绍： Ore Geology Reviews aims to familiarize all earth scientists with recent advances in a number of interconnected disciplines related to the study of, and search for, ore deposits. The reviews range from brief to longer contributions, but the journal preferentially publishes manuscripts that fill the niche between the commonly shorter journal articles and the comprehensive book coverages, and thus has a special appeal to many authors and readers.