| 西昆仑塔什库尔干新迭铁矿床赋矿地层形成时代及其地质意义 |
| Received:December 19, 2023 Revised:August 25, 2024 点此下载全文 |
| 引用本文：CHEN Gang,CHEN MaoHong,YANG ChengDong,LIU Feng,LI HouMing,MA ShouXian,REN ChengHao,ZHANG Lei.2024.Age of ore-bearing strata of Xindie iron deposit in Taxkorgan of West Kunlun and its geological significance[J].Mineral Deposits,43(5):977~992 |
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| Author Name | Affiliation | E-mail | | CHEN Gang | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China
Wuhan Center, China Geological Survey (Central South China Innovation Center for Geosciences), Wuhan 430205, Hubei, China | | | CHEN MaoHong | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | mhchen666@163.com | | YANG ChengDong | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | | | LIU Feng | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | | | LI HouMing | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | | | MA ShouXian | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | | | REN ChengHao | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | | | ZHANG Lei | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | |
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| 基金项目:本文得到地质调查项目“南疆铁多金属矿产地质调查评价”（编号:DD20240117）和“大宗紧缺战略性矿产重点远景区矿产地质调查”（编号:DD20221684）联合资助 |
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| 中文摘要:布伦阔勒群是西昆仑塔什库尔干地块的主要组成部分，也是该区域铁矿床的赋矿层位，主要发育有老并、赞坎、喀来子和叶里克等矿床。新迭铁矿为塔什库尔干成矿带北部新发现的一个小型矿床，主要含矿岩性为石英片岩、云母斜长片岩、大理岩等。新迭铁矿的形成与沉积成矿作用密切相关，其主要矿体与布伦阔勒群底部的含铁建造同生，且顺层产出。笔者对新迭铁矿赋矿围岩布伦阔勒群和铁矿体中的碎屑锆石进行年代学研究，结果表明布伦阔勒群最年轻碎屑锆石年龄主要集中在588.0~513.6 Ma，推测新迭铁矿布伦阔勒群的形成年龄应晚于588.0~513.6 Ma，为寒武纪成岩。因此，新迭铁矿的形成与寒武纪铁建造沉积有关，后期经历了区域高级变质作用和岩浆热液的改造。新迭铁矿布伦阔勒群形成时代为早古生代，应从原划分方案的古元古界地层中剥离出来。 |
| 中文关键词:磁铁矿 U-Pb年龄 寒武系 新迭铁矿 塔什库尔干铁矿带 |
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| Age of ore-bearing strata of Xindie iron deposit in Taxkorgan of West Kunlun and its geological significance |
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| Abstract:The Bulunkuole Group is a main component of the Taxkorgan Terrane of West Kunlun and represents the ore-bearing strata of iron deposits in the region, including the prominent deposits such as Laobing, Zankan, Kalaizi, and Yelike. The Xindie iron deposit is a newly discovered small deposit in the northern part of the Taxkorgan iron belt, and the main ore-bearing lithology is quartz schist, mica plagioclase schist and marble. The formation of Xindie iron deposit is closely related to sedimentary mineralization, and its main ore body intimate with the iron-bearing formation at the bottom of the Bulunkuole Group, and is produced along the bed. Based on the chronology of the detrital zircons in the Bulunkuole Group and the ore body of the Xindie iron deposit in the Tashkorgan Terrane, the age of the youngest detrital zircons in the Bulunkuole Group is mainly 588.0~513.6 Ma. Therefore, the author speculated that the formation age of the Bulunkuole Group in the Xindie iron deposit should be later than 588.0~513.6 Ma, which is a Cambrian. The formation of the new layer iron ore is related to the iron construction deposits of the Cambria, and has undergone regional advanced metamorphism and magmatic hydrothermal reform in the later period. The Bulunkuole Group in Xindie iron deposit was formed in the early Paleozoic and should be separated from the paleoproterozoic strata of the original division scheme. |
| keywords:magnetite U-Pb dating Cambrian Xindie iron deposit Taxkorgan iron ore belt |
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