Monazite as an indicator for orogenic gold deposits: Constraints from detrital zircon Th/U ratio and isotope data in the Central Asian Orogenic Belt

IF 8.9 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geoscience frontiers Pub Date : 2025-09-17 DOI:10.1016/j.gsf.2025.102155

Genshen Cao , Huayong Chen

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Abstract

Compared to typical orogenic gold deposits, the relationship between the host rocks and orogenic gold deposits in the Central Asian Orogenic Belt (CAOB) appears less pronounced. This study complies a dataset of 97,088 U-Pb and 12,757 Hf isotopic detrital zircon analyses, employing a combination of mapping and statistical analyses techniques, to investigate the connection. Results show that regions with a Th/U ratio below 0.7 and a mantle contribution calculated ranging from 50% to 75% are favorable zones for the localization of orogenic gold deposits. The findings indicate that the presence of monazite, along with a certain input of mantle material into the host rocks, is a favorable factor for the formation of orogenic gold deposits. Moreover, the host rocks of orogenic gold deposits predominantly form in convergent tectonic settings. This study not only reveals the relationship between orogenic gold deposits and host rocks, but also offers valuable exploration implications in CAOB.

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独居石作为造山带金矿的指示物：来自中亚造山带碎屑锆石Th/U比值和同位素数据的约束

与典型的造山带金矿床相比，中亚造山带的寄主岩与造山带金矿床的关系显得不那么明显。本文利用97088份U-Pb和12757份Hf同位素碎屑锆石分析数据，采用制图和统计分析相结合的方法，探讨了两者之间的联系。结果表明，Th/U比值小于0.7、地幔贡献在50% ~ 75%之间的区域是造山带金矿定位的有利区域。研究结果表明，单独居石的存在以及地幔物质的一定输入是造山带金矿形成的有利因素。造山带金矿床的寄主岩主要形成于汇聚构造环境。该研究不仅揭示了造山带金矿床与寄主岩的关系，而且对该区的找矿具有重要意义。

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来源期刊

Geoscience frontiers Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

17.80

自引率

3.40%

发文量

147

审稿时长

35 days

期刊介绍： Geoscience Frontiers (GSF) is the Journal of China University of Geosciences (Beijing) and Peking University. It publishes peer-reviewed research articles and reviews in interdisciplinary fields of Earth and Planetary Sciences. GSF covers various research areas including petrology and geochemistry, lithospheric architecture and mantle dynamics, global tectonics, economic geology and fuel exploration, geophysics, stratigraphy and paleontology, environmental and engineering geology, astrogeology, and the nexus of resources-energy-emissions-climate under Sustainable Development Goals. The journal aims to bridge innovative, provocative, and challenging concepts and models in these fields, providing insights on correlations and evolution.