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2001•Bulletin of Mineralogy Petrology and GeochemistryRequires access

Sr, Nd Isotopic Characteristics of the Jinan Gabbro Intrusion

Jun Yan

Open publisher page 4 citations

Abstract

The whole rock-mineral reference isochron of Jinan gabbro intrusion is 144±25 Ma. The isotopic data scattering of Jinan gabbro on the isochron diagram suggests that the Sr and Nd isotopic systems of the rock were unequilibrated during its crystallization. The e Nd(t) values are from -9.08 to -13.05, indicating that the source of Jinan gabbro intrusion is enriched-mantle and have a heterogeneous characteristic. The e Nd(t) vs. 87Sr/ 86Sr(t) plot shows that the Jinan gabbro resulted from the mixture of DMM、EMⅠand EMⅡ.

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What this paper is about

The whole rock-mineral reference isochron of Jinan gabbro intrusion is 144±25 Ma. The isotopic data scattering of Jinan gabbro on the isochron diagram suggests that the Sr and Nd isotopic systems of the rock were unequilibrated during its crystallization. The e Nd(t) values are from -9.08 to -13.05, indicating that the source of Jinan gabbro intrusion is enriched-mantle and have a heterogeneous characteristic. The e Nd(t) vs. 87Sr/ 86Sr(t) plot shows that the Jinan gabbro resulted from the mixture of DMM、EMⅠand EMⅡ.

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Available abstract

The whole rock-mineral reference isochron of Jinan gabbro intrusion is 144±25 Ma. The isotopic data scattering of Jinan gabbro on the isochron diagram suggests that the Sr and Nd isotopic systems of the rock were unequilibrated during its crystallization. The e Nd(t) values are from -9.08 to -13.05, indicating that the source of Jinan gabbro intrusion is enriched-mantle and have a heterogeneous characteristic. The e Nd(t) vs. 87Sr/ 86Sr(t) plot shows that the Jinan gabbro resulted from the mixture of DMM、EMⅠand EMⅡ.

Key concepts: Gabbro, Isochron, Geology, Geochemistry, Intrusion, Layered intrusion, Igneous rock

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