Comparision on the Hornblend-Biotite UP>40Ar-39Ar Ages and Zircon U-Pb Ages of Granite Plutons and Its Geochemical Implication
详细信息
- 责任者：Zhang Bangtong (State Key Laboratory for Mineral Deposits Research ; School of Earth Sciences ; Nanjing University ; Nanjing 210093 ; China) ; Ling Hongfei
- 刊名：Resources Survey & Environment
- 出版年：2013
- 卷期：34(1)
- 关键词：花岗岩 ; granite ; 氩—氩计时 ; Ar-Ar dating ; 铀—铅计时 ; U-Pb dating
- 页码：p.1-7
- 图表：illus., 2 tables, 30 refs.
- 分类号：1300
- issnNo：ISSN1671-4814
- isbnNo：CN32-1640/N
摘要
ummary name="EnDivSummary">The frequency statistics analysis is conducted for 207 pairs of difference values Δt between the hornblend-biotite40Ar-39 Ar ages(tAr) and zircon U-Pb ages(tZr) of granite plutons at home and abroad,the result indicates that theΔt(Δt=tZr-tAr) display a symmetrical normal distribution(skewness coefficient CSK=-0.193;kurtosis coefficient CKU=16.9) in the histogram,the Δt are both positive and negative with a mode of 0.40 Ma and a mean of 0.45 Ma.Using least squares regression procedure,a best liner regression equation(tAr=0.997 7×tZr+0.004 5) with high correlation coefficient(R=0.995) and regression coefficient(closed ito 1) is fitted for zircon U-Pb ages(tZr) and hornblend-biotite40Ar-39Ar ages(tAr) of granite plutons.These statistical analysis characteristics indicate that the hornblend-biotite40Ar-39Ar dating results are corresponding with zircon U-Pb dating results for granites,and there seams no a regularity of hornblende40Ar-39 Ar dating ages>biotite40Ar39Ar dating ages.
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