| 齐大山铁矿黑云变粒岩单锆石年龄及意义 |
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| 引用本文：.1995.U-Pb isotope age of individual zircon from biotite leptynite in the Qidashan iron deposit and its significance[J].Mineral Deposits,14(3):216~219 |
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| 中文摘要:齐大山特大型鞍山式铁矿的成矿时代，以往都是根据铁矿的构造和建造特征，以及与铁矿伴生的花岗岩类岩体的同位素年龄数据间接推断的。本文最近获得了该铁矿的黑云变粒岩中，单颗粒锆石U-Pb同位素年龄为（2533士53）×l06 a。这是迄今为止研究该矿床成矿时代较为可靠的直接测年数据。 |
| 中文关键词:鞍山式铁矿 黑云变粒岩 单锆石U-Pb年龄 成矿时代 晚太古代 |
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| U-Pb isotope age of individual zircon from biotite leptynite in the Qidashan iron deposit and its significance |
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| Abstract:The metallogenic epoch of the Qidashan supergiant Anshan type iron deposit in Anshan-Benxi area, Liaoning Province, had been traditionally inferred on the basis of structural and formational characteristics of the iron deposit as well as isotope ages of granitoid associated with the deposit. Recently, individual zircon from biotite leptynite of this deposit was dated U-Pb isotopically at (2533土53) ×l06 a, which is the most reliable metallogenic age ever obtained. |
| keywords:Anshan type iron deposit, biotite leptynite, U-Pb age of individual zircon, metallogenic epoch, Late Archean |
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