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- Title
粤北坪下水地区辉绿岩地球化学特征及其成因.
- Authors
郭新文; 梁园园; 赖静; 周航兵; 江卫兵
- Abstract
Pingxiashui area is near the Nanxiong fault within the southern Zhuguang pluton in Northern Guangdong, China. In this paper, petrographic and petrogeochemical characteristics of the diabase dyke in Pingxiashui area were studied. The results showed that: diabase in Pingxiashui area is characterized by the low content of SiO2 (44.98%~50.87%), TiO2 (1.46%~ 1.94%) and TFe2O3 (10.63%~14.28%), belong to calc-alkaline basalt series;Trace elements are relatively enriched in Cs, Pb, U, W, relatively loss of Rb, Ba, Sb, Sr, and low content of ΣREE (60.26×10-6 ~141.48×10-6, average 96.58×10-6). The REE pattern is right inclined, and no obvious negative Eu abnormality is found. The ratio of trace elements and the diagrams showed that it fall into intraplate basalt, and the rock material composition bears the characteristics of mid-ocean ridge basalt (MORB). Comprehensive analysis showed that the original magma of diabase dikes in the Pingxiashui area mainly came from enriched mantle and was affected by crustal contamination in the process of ascending emplacement.
- Subjects
GUANGDONG Sheng (China); DIABASE; MID-ocean ridges; BASALT; IGNEOUS intrusions; MAGMAS; TRACE elements; CESIUM
- Publication
World Nuclear Geoscience, 2022, Vol 39, Issue 2, p223
- ISSN
1672-0636
- Publication type
Article
- DOI
10.3969/j.issn.1672-0636.2022.02.005