Tectonic controls on ore deposit exhumation and preservation:A case study of the Handan-Xingtai iron-skarn district
作者机构：Key Laboratory of Resource Exploration Research of Hebei ProvinceHebei University of EngineeringHandan 056038PR China Hebei Province Collaborative Innovation Center for Strategic Critical Mineral ResearchHebei GEO UniversityShijiazhuang 050031PR China Laboratory for Mineralogy and PetrologyDepartment of GeologyGhent UniversityKrijgslaan 281 S89000 GhentBelgium Key Laboratory of Deep-Earth Dynamics of Ministry of Natural ResourcesChinese Academy of Geological SciencesBeijing 100037PR China The Institute of Regional Geological Survey of Hebei ProvinceLangfang 065000HebeiPR China
出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)
年 卷 期：2024年第15卷第6期
页 面：469-484页
核心收录：
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
基 金：supported by the Open Project Program of Hebei Province Collaborative Innovation Center for Strategic Critical Mineral Research,Hebei GEO University,China(No.HGUXT-2023-14) the China Geological Survey(DD20221646) National Natural Science Foundation of Hebei Province(Nos.D2020402013 and D2023402022) National Natural Science Foundation of China(No.42102091)
主 题：Low-temperature thermochronology Ore deposits Exhumation and preservation Handan-Xingtai district Xishimen iron deposit
摘 要：Despite the growing concern regarding post-mineralization thermo-tectonic processes in recent years,the relative roles in exhuming and preserving ore deposits remain highly *** study presents new apatite fission track and(U-Th)/He data from the Xishimen iron skarn deposit in the Handan-Xingtai district,central North China *** fission track dating yielded central ages ranging from 88±18 Ma to 125±9 Ma,with mean confined track lengths varying between 11.9±0.4μm and 13.3±0.2μ*** apatite(U-Th)/He dating provided ages of 42.5±0.8 Ma to 48.1±3.3 *** new data,combined with previous zircon U-Pb and potassium-bearing mineral^(40)Ar/^(39)Ar ages,revealed three cooling episodes:very rapid cooling(100–140℃/Ma)at ca.130–120 Ma,a protracted slow cooling period(0.2–0.4℃/Ma)at ca.120–50 Ma,and moderate cooling(0.8–1.0℃/Ma)since ca.50 *** initial rapid cooling phase was primarily attributed to post-magmatic thermal equilibration following the shallow emplacement of the Xishimen *** subsequent cooling phases were controlled by uplift and exhumation *** thermal models indicate an estimated total unroofing thickness of3 km,which is shallower than the emplacement depth of the ore deposit(3–5 km).This suggests significant potential for mineral ***,a comprehensive review of preservation mechanisms for various ore deposits underscores the significant role of tectonics in both exhuming and preserving ore bodies.
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