- 责任者：Yuan Feng (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009) ; Zhou Taofa
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(5)
- 关键词：花岗岩 ; granite ; 铀—铅计时 ; U-Pb dating ; 江苏 ; Jiangsu Province ; 安徽 ; Anhui Province
- 页码：p.821-833
- 图表：4 illus., 3 tables, 57 refs.
- 分类号：0801
- 出版序号：826
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
MARGIN: 0cm 0cm 0pt" class=MsoNormal>///Granitic intrusions in the Ningwu Basin, outcropping sporadically, consist mainly of quartz monzonite and granite. This paper presents a detail study of some granitic intrusions by means of LA-ICPMS zircon dating, Lu-Hf zircon isotope, and Sr-Nd isotope analyses. The date indicate that the granitic intrusions emplaced in 126~130 Ma, suggesting that they were the products of magmatic activity in Early Cretaceous. The Nd-Sr isotope results suggest that the granitic intrusions derived from the metasomatic mantle, compositionally closing to the EMI, which has relationship with the subduction of the Pacific Plate. The Lu-Hf isotope results imply that the granitic plutons have genetic and evolutional relationship with the mineralized diorites or porphyry diorites.