Premium
Authigenic aluminium phosphate‐sulphates in sandstones of the Mitterberg Formation, Northern Calcareous Alps, Austria
Author(s) -
SPÖTL CHRISTOPH
Publication year - 1990
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1990.tb01828.x
Subject(s) - authigenic , diagenesis , geology , calcareous , cementation (geology) , geochemistry , carbonate , dissolution , phosphate minerals , phosphate , mineralogy , phosphorite , apatite , quartz , chemistry , paleontology , cement , metallurgy , materials science , organic chemistry
Complex aluminium phosphate‐sulphate minerals of the hinsdalite group have been identified as early diagenetic precipitates in Late Permian sandstones of the Northern Calcareous Alps, western Austria. According to their chemical composition they can be regarded as solid solutions between woodhouseite, svanbergite, crandallite and goyazite. The model proposed for their origin involves the dissolution of detrital apatite in a low‐pH environment and subsequent precipitation of aluminium phosphate‐sulphate minerals, which clearly pre‐date syntaxial quartz cementation of the sediment. Their occurrence probably has been overlooked in other sandstones showing diagenetic apatite dissolution. The recognition of such minerals could provide a significant insight into early phosphate diagenesis.