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Precise columbite-(Fe) and zircon U-Pb dating of the Nanping No. 31 pegmatite vein in northeastern Cathaysia Block, SE China TEXT SIZE: A A A
The Nanping pegmatite deposit is a large Ta-Nb-Sn deposit in the northeastern Cathaysia Block, SE China. Columbite-group minerals from zone I in the Nanping No. 31 pegmatite vein belong to columbite-(Fe). The compositions and texture features of zircon grains from the same zone identify their magmatic origin. Columbite-(Fe) U-Pb age coincides well with the U-Pb age of zircon, and these age data constrain the absolute formation timing of this pegmatite vein to approximately 387 Ma. Zircon epsilon Hf(t) values from the Nanping No. 31 pegmatite range from -13.81 to -11.60 with the T-DM2 model ages ranging from 2107 to 2246 Ma, implying that the Nanping pegmatite-forming melts are derived from Paleoproterozoic metasedimentary rocks. The differences in emplacement age and Hf isotopic features preclude the surrounding granites from being the parental granite of the pegmatite vein. (C) 2016 Published by Elsevier B.V.
 

Publication name

 ORE GEOLOGY REVIEWS, 83 300-311; 10.1016/j.oregeorev.2016.10.040 APR 2017

Author(s)

 Tang Yong; Zhao Jing-Yu; Zhang Hui; Cai Da-Wei; Lv Zheng-Hang; Liu Yun-Long; Zhang Xin

Corresponding author(s) 

 ZHANG Hui 
 zhanghui@vip.gyig.ac.cn
 Chinese Acad Sci, Inst Geochem, Key Lab High Temp & High Pressure Study Earths In, Guiyang 550081, Peoples R China

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