Petrological and Geochemical Features of Basalts at 49.6°E and 50.5°E Hydrothermal Fields along the Southwest Indian Ridge
详细信息
- 责任者：Yu Miao (School of Ocean Sciences ; China University of Geosciences ; Beijing 100083 ; China) ; Su Xin
- 刊名：Geoscience
- 出版年：2013
- 卷期：27(3)
- 关键词：洋中脊玄武岩 ; mid-ocean ridge basalts ; 印度洋 ; Indian Ocean
- 页码：p.497-508
- 图表：9 illus., 8 tables, 25 refs.
- 分类号：0801
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
In this paper, the authors analyzed basalt samples from Southwest Indian Ridge. These samples are fragments of basaltic pillow lavas and sheet flows. These samples are mainly porphyritic with fine-grained, and euhedral to anhedral phenocrysts of plagioclase, olivine and pyroxene. The data indicate that mantle melting in the study area occur in higher degree and at deeper depth. Furthermore, petrologic and mineralogical features of basalts at 49.6°E and 50.5°E suggest that magma activity and source in the study area are complex.