| 河南登封石牌河“变闪长岩体”的部分岩石学和地球化学以及U-Pb同位素年龄 |
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| 引用本文：王泽九,沈其韩,金守文.1987.河南登封石牌河“变闪长岩体”的部分岩石学和地球化学以及U-Pb同位素年龄[J].地球学报,9(2):215-225. |
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| 中文摘要:本文主要对河南登封石牌河“变闪长岩体”的岩石学、岩石化学、稀土元素地球化学和同位素年代学进行了初步研究和讨论。初步认为该岩体不是一个成分单一的岩体,而是由二长岩—闪长岩组成的较复杂岩体、并曾受到后期钾化。三个稀土元素模式图十分一致,说明属同一系列的岩体。图上显示轻稀土明显富集,无负Eu异常,∑REE为378.43—488.05。Eu/Eu*=0.77—0.88。岩石中锆石的U-Pb一致曲线上交点年龄为2520±17Ma,代表了岩体侵位和结晶的时代。 |
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| PETROLOGY, GEOCHEMISTRY AND U-Pb ISOTOPIC DATING OF THE SHIPAIHE“METADIORITE MASS”IN DENGFENG COUNTY, HENAN PROVINCE, CHINA |
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| Abstract:The Shipaihe "metadiorite mass" occurring in Dengfeng County, Henan Province, is a complex igneous mass which has been comtaminated with old rocks at depths and has undergone alkaline metasomatism after emplacement. Its petrochemical composition varies from monzonite to diorite. The total content of REE (3 sample)ranges from 378.43 to 488.05, and no Eu anomaly is shown. Eu/Eu = 0.77-0.88.The chondrite-normalized REE distribution of the rocks shows a high fractionated pattern. LREE is predominant. The age of emplacement of this igneous mass is about 2520 + 17Ma, (zircon U-Pb) belonging to the Late Archaean. |
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