- 责任者：Yan Haiqing (College of Earth Science and Resource ; Chang’an University ; Xi’an 710054 ; China) ; Tang Zhongli
- 刊名：Journal of Lanzhou University (Natural Sciences)
- 出版年：2011
- 卷期：47(6)
- 关键词：火成岩 ; igneous rocks ; 铀—铅计时 ; U-Pb dating ; 河南 ; Henan Province
- 页码：p.23-32
- 图表：14 illus., 5 tables, 34 refs.
- 分类号：0801
- 出版序号：20122322
- issnNo：ISSN0455-2059
- isbnNo：CN62-1075/N
The major conclusions based on the lithochemistry, chronology and Sr, Nd isotopic compositions of Zhou’an rock masses are: Zhou’an rock masses are ferruginous ultramafic rock deficient in SiO2 and alkali; the magmatite is subalkali and belongs to tholeiitic basalt series; the lanthanon fractionation of the light and heavy is obvious because the LREE is concentrated and HREE is defective; trace element primitive mantle standardization shows the characteristics of volcanic arc basalt as being enriching in Rb, Th, U, La, hypo- enriching in Sm, Zr, Hf, Eu and hypo-lean in Nd, Ta. The confirmation of the character of its mantle source is very important in revealing the mantle inhomogeneity in the Qinling-Dabie orogenic zone.hemas-microsoft-com:office:office" />