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Zircon isotopic ages from magnetite quartzites of the Jianping metamorphic complex, western Liaoning Province

机译:辽西建平变质体磁铁矿石英岩中的锆石同位素年龄

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摘要

Using the zircon Pb evaporation method and high precise ion microprobe analyses, zircon isotopic ages in supracrustal magnetite quartzites from Jianping metamorphic complex have been obtained. The results show that the deposition of the supracrustal rocks occurred around 2 552-2 520 Ma and the peak of granulite facies metamorphism reached at about 2 487 Ma; about (1 806 ± 16) Ma, i.e.
机译:利用锆石Pb蒸发法和高精度的离子探针分析,获得了建平变质体表壳磁铁矿石英岩中锆石的同位素年龄。结果表明,表壳岩的沉积发生在2552〜2520Ma左右,花岗岩相变质峰达到2487Ma左右。大约(1806±16)Ma,即

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