Title: An occurrence of bavenite in the Cape Granite Suite, southwestern Cape Province, South Africa, and its implication on the formation of the host pegmatite.
Authors: Scheepers, R.; O'Brien, R. D.; Schoch, A. E.
Abstract: Bavenite, (Ca4[(Al,Be)4(Si9(O,OH)26-9)](OH)2 n), is present in a pegmatite of the Paarl Pluton, a metaluminous I-type granite of Late Precambrian age. We are not aware of any other previous description of a beryllium mineral occurrence in the Cape Granite Suite. The pegmatite consists essentially of quartz and microcline microperthite together with albite, calcite and fluorite. A hydrothermal alteration assemblage of epidote, chlorite and bavenite occurs in vugs and veins within the pegmatite. Stilbite, which is stable below 170°C, is also present, but not texturally related to the alteration assemblage.
Subjects: PEGMATITES; GRANITE; HYDROTHERMAL alteration; BERYLLIUM; QUARTZ
Publication: South African Journal of Geology, 2017, Vol 120, Issue 2, p223
ISSN: 1012-0750
Publication type: Academic Journal
DOI: 10.25131/gssajg.120.2.223

An occurrence of bavenite in the Cape Granite Suite, southwestern Cape Province, South Africa, and its implication on the formation of the host pegmatite.

Scheepers, R.; O'Brien, R. D.; Schoch, A. E.