中国西北新疆喀喇昆仑地区世界级巨型火烧云非硫化物锌铅矿床的成矿时代

IF 2.2 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Terra Nova Pub Date : 2024-06-07 DOI:10.1111/ter.12721

Da Wang, Wenbin Jia, Yongsheng Li, Ryan Mathur, Xiaofei Yu, Yvhan Lu, Meng Dai, Guang-Sheng Yan

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引用次数: 0

摘要

成矿地质年代学在矿石成因和矿化演化研究中发挥着至关重要的作用。遗憾的是，准确确定非硫化物锌铅矿床的成矿时代十分困难。在此，我们采用铁闪长岩的 Rb-Sr 测定和共生方解石的 Sm-Nd 测定来探讨火烧云锌铅矿床的成矿年龄。根据 Rb-Sr 和 Sm-Nd 同位素比得出的等时年龄分别为 26.6 ± 1.7 Ma 和 27.5 ± 7.6 Ma。这些年龄被确定为火烧云矿床的成矿年龄。此外，对东特提斯成矿带碳酸盐岩型锌铅矿床的研究表明，这些矿床形成于类似的构造环境中，并得出了一致的新生代年龄。总之，我们的研究表明，东特提斯成矿带的碳酸盐岩包裹铅锌矿成矿年龄主要集中在古近纪晚期，与青藏高原40-26Ma期间的碰撞造山运动直接相关。

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Metallogenic age of the world‐class giant huoshaoyun non‐sulphide Zn–Pb deposit in Karakoram Area, Xinjiang, Northwest China

Metallogenic geochronology plays a crucial role in the study of ore genesis and mineralization evolution. Unfortunately, accurately determining the metallogenic age of the non‐sulphide Zn–Pb deposits is difficult. Herein, we employed Rb–Sr dating of smithsonite and Sm–Nd dating of coexisting calcite to explore the mineralization ages of the Huoshaoyun Zn–Pb deposit. The Rb–Sr and Sm–Nd isotopic ratios yield isochron ages of 26.6 ± 1.7 and 27.5 ± 7.6 Ma, respectively. These obtained ages are identified as the metallogenic age of the Huoshaoyun deposit. Moreover, investigations into carbonate‐hosted Zn–Pb deposits in the East Tethys Metallogenic belt suggest they have formed in similar tectonic settings and yielded consistent Cenozoic ages. In sum, our research indicates that carbonate‐hosted Pb–Zn metallogenic ages in the East Tethys Metallogenic belt are principally concentrated in the late Palaeogene, and directly related to the collisional orogeny of the Tibetan Plateau during 40–26 Ma.

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来源期刊

Terra Nova 地学-地球科学综合

CiteScore

4.80

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Terra Nova publishes short, innovative and provocative papers of interest to a wide readership and covering the broadest spectrum of the Solid Earth and Planetary Sciences. Terra Nova encompasses geology, geophysics and geochemistry, and extends to the fluid envelopes (atmosphere, ocean, environment) whenever coupling with the Solid Earth is involved.