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- Title
Characteristics of Magmatic Rocks and Tectonic Setting of Mazhuangshan Area, East Tianshan, China.
- Authors
Chen Shizhong; Zhou Jiyuan
- Abstract
The Mazhuangshan area lies in northeast to Aqikekuduke, where are distributed intermediate-acid rocks, which were formed in the Middle-Late Carboniferous epoch. The magmatic rocks are peraluminous and belong to calcareous series. All values of ACNK(1.03 - 2.12), ANK(1.67 - 2.93), SI(4.1 - 33), δ(0.71 - 4.82), La/ΣREE(0.09 - 0.26) ΣLREE/ΣHREE(1.76 - 11.01), (La/Sm)[sub N](1.60 - 6.35), (Sm/Nd)[sub N](0.33 - 0.58), (La/Yb)[sub N](4.7 - 12.1), La[sub N]/Lu[sub x](5.9 - 11.8), (Ce/Yb)[sub N](3.14 - 6.64), δEu(0.38 - 1.06), Rb[sub N]/Sr[sub N](42 - 120) and Sr[sup *](0.02 - 0.2) demonstrate they vary with D-I(45 - 90). S-B diagram also shows that the lithophile elements are abundant in acidic magmatic rocks. Moreover, it is concluded that the primitive magma originated from a subduction zone at the continental edge, and underwent fractional crystallization and contamination, then generated the magmatic rocks. The multi-cation index (R1: 3055 - 3993, R2: 286 - 438) shows that the primitive magma originated from the mantle. All these conclusions are beneficial for exploring gold deposits in the area.
- Subjects
CHINA; MAGMAS; IGNEOUS rocks
- Publication
Chinese Journal of Geochemistry, 2000, Vol 19, Issue 3, p261
- ISSN
1000-9426
- Publication type
Article
- DOI
10.1007/BF03166885