Download PDF by Bernhard J. Knipping, Ralph B. Phillips: Basalt intrusions in evaporites

By Bernhard J. Knipping, Ralph B. Phillips

ISBN-10: 0387513086

ISBN-13: 9780387513089

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As in the basanites-limburgites, the greatest deviations are found in samples with considerable amounts of microlitic glass here as well (samples 46/87 and 31/68). 6. The not classified sample 46/86 from Dreienberg could be an alkali-olivine basalt based on its chemical composition. In fig. 3 it seems that the autometamorphically altered, microscopically not identifiabled samples can also not be classified using their chemical composition, as expected. The method proposed by DE LA RocI-m et al (1980) also fails when the mineralogical and chemical composition have been extensively altered.

Sulfur usually occurs as sulfate (anhydrite), but also as native sulfur and sulfide. Due to their fine dissemination in the groundmass of the basalt these mineral components could not be completely removed before the chemical components had been determined. The sample-by-sample normalization of the analyses for water-, carbonate-, and sulfur-free amounts did not produce any results comparable with the respective surface samples. 3; KN~VVn~o1984). 2 Major, minor, and trace components in the basaltic rocks Explanations: The samples within the individual basalt dikes are arranged from north to south.

Like the amygdules, the margins of the clusters are lined with glass, carbonates, and/or anhydrite. The filling consists of halite (fig. 2). E (1976). - Gases The nearly submicroscopic, very high relief inclusions in the halite fillings of the amygdules and clusters are possibly gas inclusions. The cleavage typical for halite usually appears only as shadows. Sulfur Since native sulfur was not observed in any of the basalt thin sections, it must be disseminated through the silicate rock in submicroscopic phases.

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Basalt intrusions in evaporites by Bernhard J. Knipping, Ralph B. Phillips

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