Abstract
The basement of the Songliao Basin mainly contains low-grade metamorphic rocks and granites. It has been long disputed whether the basin has Precambrian metamorphic basement. This is a report of zircon SHRIMP U-Pb dating results of a meta-diorite sample, which was taken from the Si-5 drilling hole in the southern portion of the Songliao Basin. The SHRIMP analyses indicate that the meta-diorite with a weighted mean 207Pb/206Pb age of 1839±7 Ma (2σ, n = 8) was emplaced during Paleo-Proterozoic time. Additionally, the meta-diorite has old Nd model ages (T DM1: 2999Ma; T DM2: 2849Ma). These data suggest that the southern part of the Songliao Basin do possess Precambrian basement.
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Wang, Y., Zhang, F., Zhang, D. et al. Zircon SHRIMP U-Pb dating of meta-diorite from the basement of the Songliao Basin and its geological significance. CHINESE SCI BULL 51, 1877–1883 (2006). https://doi.org/10.1007/s11434-006-2035-y
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DOI: https://doi.org/10.1007/s11434-006-2035-y