Zircon Ce 4+ /Ce 3+ ratios and ages for Yulong ore-bearing porphyries in eastern Tibet
Liang, Hua-Ying; Campbell, Ian; Allen, Charlotte M; Sun, Weidong; Liu, Cong-Qiang; Yu, Heng-Xiang; Xie, Ying-Wen; Zhang, Yu-Qiang
Yulong ore-bearing porphyries, along the northwestern extension of the Red River-Ailao Shan fault system in eastern Tibet, consist of five porphyry deposits, containing a total of more than 8 million tons of copper resources. U-Th-Pb laser inductively coupled plasma mass spectrometry dating of zircon shows that the porphyries were emplaced in Early Tertiary (41.2-36.9 Ma), covering a period of ∼4.3 Ma, with formation ages decreasing systematically from northwest to southeast. The start of...[Show more]
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