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A granite–syenite–gabbro association from inland South China has been studied for zircon U–Pb ages and Hf isotopic compositions as well as whole-rock elemental and Sr–Nd isotopic compositions to constrain their sources and tectonic settings. These rocks have distinctive crystallization ages: the Longyuanba biotite granites have a mean age of ~240Ma, the Longyuanba two-mica granites, Pitou alkali-feldspar...
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