MARGIN: 0cm 0cm 0pt" class=MsoNormal>mes New Roman">Formation Age, Geochemical Characteristics and Genesis of Pitchblende from No.302 Uranium Deposit in Northern ml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />
- 责任者：Huang Guolong (State Key Laboratory for Mineral Deposit Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing210093 ; China) ; Yin Zhengping
- 刊名：Mineral Deposits
- 出版年：2010
- 卷期：29(2)
- 关键词：沥青铀矿 ; pitchblende ; 广东 ; Guangdong Province
- 页码：p.352-360
- 图表：6 illus., 3 tables, 31 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
MARGIN: 0cm 0cm 0pt; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" class=MsoNormal>mes New Roman">302 uranium deposit, located in the southern part of Zhuguangshan composite granite body, is the largest uranium deposit of granitic type in China and has evident vertical zoning.mso-spacerun: yes"> U-Pb and Sm-Nd isochron dating of pitchblendes from the deposit yields reference ages of (68.7 ±2.7) Ma and (70±11) Ma, respectively.mso-spacerun: yes"> These two ages are consistent with the main formation period of uranium deposits of granitic type in South China.mso-spacerun: yes"> Low values of εNd(t)mso-spacerun: yes"> ( -11.3 ~ - 13.1)mso-spacerun: yes"> and old Nd model ages (1.76~1.88 Ga) of the pitchblendes are very similar to data of the host granite bodies (Changjiang and Youdong). Trace and rare earth element characteristics are also similar to those of the granites. All these indicate that uranium of the ore deposit might have been derived from the host granites, especially from the Changjiang granite.ml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />