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New zircon U–Pb data, along with the data reported in the literature, reveal five phases of magmatic activity in the Tengchong Terrane since the Early Paleozoic with spatial and temporal variations summarized as Cambrian–Ordovician (500–460Ma) to the east, minor Triassic (245–206Ma) in the east and west, abundant Early Cretaceous (131–114Ma) in the east, extensive Late Cretaceous (77–65Ma) in the...
The Shuangqiaoshan Group is an important stratigraphic unit in the Jiangnan orogen, however, prior to this study its age was unclear. Zircon from the intruding gabbros, interleaved quartz-keratophyres and tuffs yielded ages of 801±4 Ma, 878±5 Ma and 879±6 Ma, respectively. The ages of the quartz-keratophyres and tuffs suggest that the depositional age for the Shuangqiaoshan Group is ca. 880 Ma, rather...
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