China Business Newsweekly
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Report summarizes earth sciences study findings from Nanjing University
October 20th, 2009
"The Qitianling granite batholith (QGB) is located in the southern Hunan Province, middle part of the Nanling Range, South China. Its total exposure area is about 520 km(2)," scientists in Nanjing, People's Republic of China report.
"Based on our 25 single grain zircon U-Pb age data and 7 published data as well as the geological, petrological, and space distribution characteristics, we conclude that QGB is an Early Yanshanian (Jurassic) multi-staged composite pluton. Its formation process can be subdivided into three major stages. The first stage, emplaced at 163-160 Ma with a peak at about 161 Ma, is mainly composed of hornblende-biotite monzonitic granites and locally...
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Source: China Business Newsweekly (2009-10-20)