Characteristics of magmatic rocks and tectonic setting of Mazhuangshan area, East Tianshan, China |
| |
| Authors: | Shizhong Chen Jiyuan Zhou Lianxing Gu Bingfang Cui Huiliang Xiao |
| |
| Institution: | (1) Key Laboratory of Orogen and Crust Evolution, Peking University, Beijing, 100871, China;(2) Key Laboratory of Metallogenic Dynamics, Guangzhou Institute of Geochemistry, CAS, Guangzhou, 510640, China;(3) Geological Survey of Western Australia, Perth, Australia, 100 Plain Street, East Perth, WA, 6004, Australia;(4) School of Earth and Environment, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia |
| |
| 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)N(l.60–6.35), (Sm/Nd)N(0.33–0.58), (La/Yb)N(4.7–12.1), LaN/LuX(5.9–11.8), (Ce/Yb)N(3.14–6.64), δEu(0.38–1.06), RbN/SrN(42–120) and Sr* (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. |
| |
| Keywords: | |
| 本文献已被 维普 SpringerLink 等数据库收录！ |
|
