论文信息 - SHRIMP dating of volcanic rocks from Ningwu area and its geological implications

SHRIMP dating of volcanic rocks from Ningwu area and its geological implications

The SHRIMP U-Pb ages are reported for two volcanic rocks from the Longwangshan and the Dawangshan formations respectively, Ningwu area, Jiangsu Province. The Dawangshan formation (NB-01) is dated at (127 3) Ma, and the Longwangshan formation (NL-01), (131 4) Ma. Besides, a few Archean zircons are also found in the Longwangshan formation, which suggests a possible Archean basement in the region.

[1] D. Groves,et al. Single zircon U-Pb dating of the Kongling high-grade metamorphic terrain: Evidence for >3.2 Ga old continental crust in the Yangtze craton , 2001 .

[2] J. Kirschvink,et al. Zircon U-Pb ages for the Early Cambrian time-scale , 1992, Journal of the Geological Society.

[3] S. Claesson. Isotopic evidence for the Precambrian provenance and Caledonian metamorphism of high grade paragneisses from the Seve Nappes, Scandinavian Caledonides , 1987 .

[4] I. Williams,et al. Isotopic evidence for the Precambrian provenance and Caledonian metamorphism of high grade paragneisses from the Seve Nappes, Scandinavian Caledonides , 1987 .