投稿时间：2025-10-03
修订日期：2026-01-14
网络发布日期：2026-03-11
中文摘要:赤瓦屋铜钼钨矿床位于太行山构造-岩浆带北段，是近年来找矿勘查中新发现的斑岩型矿床，在时空分布上与中生代赤瓦屋岩体关系密切，该杂岩体具有多期次、多岩相的特征。赋矿围岩为杂岩体中的中心相斑状花岗闪长岩和深部的花岗斑岩，二者与铜钼钨矿化具有明显的成因联系。文章对赤瓦屋含矿岩体进行了LA-ICPMS锆石U-Pb定年和锆石原位Hf同位素测试。结果表明，斑状花岗闪长岩和2组花岗斑岩的谐和年龄分别为（133.1±0.76）Ma、（127.7±0.62）Ma和（128.8±0.83）Ma，表明赋矿岩体形成于早白垩世；3组样品的εHf（t）为-23.9～-19.7，指示成岩物质来源为混合来源并以壳源为主。结合岩石学证据，文章认为赤瓦屋矿床在早白垩世发生热液成矿和斑岩成矿两期成矿作用，对应时间为～133 Ma和～129 Ma，成矿作用的终止时间不晚于（127.7±0.62）Ma；矿床的形成与华北克拉通的破坏与减薄有着密切的联系。
Abstract:The Chiwawu Cu-Mo-W deposit is located on the northern section of the Taihang Mountain tectonic-magmatic belt, which is a porphyry deposit newly discovered and is closely related to the Chiwawu granitic complex.The ore bodies are hosted in porphyritic granodiorite and deep granite porphyry, which demonstrate a clear genetic link with Cu-Mo-W mineralization. In this paper, we present the results of LA-ICP-MS U-Pb dating and in-situ Hf isotope analysis of zircons in the Chiwawu ore-bearing intrusive rocks. Zircon U-Pb dating yields concordant ages of（133.1±0.76）Ma,（127.7±0.62）Ma and（128.8±0.83）Ma for three samples respectively, indicating that the ore-bearing rocks were formed in the Early Cretaceous. The εHf（t） of the three samples ranged from -23.9 to -19.7, indicating that the rocks were derived from mixing of crust and mantle source, dominated with crustal source. Combined with petrological evidence, we believed that there exist two stages of mineralization during the Early Cretaceous, the earlier one is hydrothermal mineralization at about 133 Ma and the later one is porphyry mineralization at about 129 Ma, and the end of mineralization is not later than（127.7±0.62）Ma. The formation of the Chiwawu deposit is closely related to the destruction and thining of the North China Craton.
keywords:zircon U-Pb dating in-situ Hf isotope analysis porphyry deposit polymetallic deposit Chiwawu
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基金项目:深地国家科技重大专项:华北北缘东段金矿多尺度找矿预测与勘查(编号:2025ZD1006400); 河北省自然资源厅科研项目:河北省铜矿成矿规律及找矿方向研究(编号:Z2024044); 河北省斑岩型矿床研究重点实验室(编号:HBBY202401)联合资助
引用文本：
史淳元,王丰翔,张万益,许立风,杨小虎,刘创脱,杨洋,王诗琪,吕安达.2026.太行山北段赤瓦屋铜钼钨矿床两期叠加成矿的年代学证据及地质意义[J].矿床地质,45(1):141~158SHI ChunYuan,WANG FengXiang,ZHANG WanYi,XU LiFeng,YANG XiaoHu,LIU ChuangTuo,YANG Yang,WANG ShiQi,Lü AnDa.2026.Geochronology evidence and geological significance of two-stage superimposed mineralization in Chiwawu Cu-Mo-W deposit on northern section of Taihang Mountain[J].Mineral Deposits45(1):141~158
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