Mineralogical study of the kaersutite in the volcanic nodule at Eifel, W. Germany

Mitra Sachinath: Mineralogical study of the kaersutite in the volcanic nodule at Eifel, W. Germany. In: Acta mineralogica-petrographica, (24) 1. pp. 19-27. (1979)

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Some lapilli and bombs occurring in the ash ejecta around Eifel in Germany were investigated by the author and one such contained pitch-black shining crystal-aggregates, which on detailed study were found to contain kaersutite, having a chemical formula obtained by wet chemistiy as: (Si5.,Al2.3) (Al0.2Ti„.4Fe3 + 0.5Mn0.01 Mg3.2) (Ca2.0 Na0.6 K0.4 P0.01) (O, OH, F)32.Fe2+ and Fe3 + contents determined by MOSSBAUER were different from chemical data and are in the ratio of 73 : 27. High content of A1203 (3.87—10.84 wt. %) with Tschermak's component ranging from 5.9 to 18.4 mol. p.c. in clino-pyroxenes in the wehrlite and clinopyroxenite inclusions in the volcanics of Eifel region suggest the parent magmas to be alkali-basalt in composition. The chemistry of kaersutite suggests that the crystallization took place in hydrous condition in the lowest part of the crust.

Item Type: Article
Journal or Publication Title: Acta mineralogica-petrographica
Date: 1979
Volume: 24
Number: 1
ISSN: 0365-8066
Page Range: pp. 19-27
Language: English
Publisher: University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/39398/
Uncontrolled Keywords: Kőzettan, Ásványtan, Földtan
Additional Information: Bibliogr.: p. 26-27. ; ill. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.05. Earth and related environmental sciences
Date Deposited: 2016. Oct. 17. 09:25
Last Modified: 2022. Jul. 25. 12:16
URI: http://acta.bibl.u-szeged.hu/id/eprint/24641

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