对南部非洲史前岩地球化学的控制

IF 1.2 4区地球科学 Q2 GEOLOGY

South African Journal of Geology Pub Date : 2022-03-01 DOI:10.25131/sajg.125.0007

M. Elburg, B. Cairncross

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引用次数: 0

摘要

对来自南部非洲的8个前辉石样品进行了主要元素和微量元素地球化学分析，以研究其组成的控制因素。主要元素的变化是有限的(Fe3+-Al交换，Mn的富集有限)，微量元素通常出现在< 10ppm的水平，除了Ga和有时Ti。微量元素含量低的主要控制因素似乎是晶体位置的小。然而，在B, Ti, Sc, W, Mo, as和稀土元素中观察到一些元素的变化。这些变化意味着受寄主岩石及其周围环境的控制，以及共存矿物的身份。

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Controls on the geochemistry of southern African prehnite

Eight samples of prehnite from southern Africa were analysed for their major and trace element geochemistry to investigate the controls on their compositions. Variations in the major elements are limited (Fe3+-Al exchange, limited enrichment in Mn), and trace elements typically occur at levels <10 ppm, apart from Ga and sometimes Ti. The main control on the low trace element contents appears to be the small size of the crystallographic sites. Nevertheless, variations were observed in several elements, such as B, Ti, Sc, W, Mo, As and the rare earth elements. These variations imply a control by the host rock and its surrounds, as well as the identity of co-existing minerals.

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来源期刊

South African Journal of Geology 地学-地质学

CiteScore

3.60

自引率

5.60%

发文量

审稿时长

>12 weeks

期刊介绍： The South African Journal of Geology publishes scientific papers, notes, stratigraphic descriptions and discussions in the broadly defined fields of geoscience that are related directly or indirectly to the geology of Africa. Contributions relevant to former supercontinental entities such as Gondwana and Rodinia are also welcome as are topical studies on any geoscience-related discipline. Review papers are welcome as long as they represent original, new syntheses. Special issues are also encouraged but terms for these must be negotiated with the Editors.