By Bernhard J. Knipping, Ralph B. Phillips

ISBN-10: 0387513086

ISBN-13: 9780387513089

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Extra resources for Basalt intrusions in evaporites

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The studied rocks generally have a porphyritic texture. Deviations from this are also noted. Olivine Xenomorphic olivine occurs as aggregates in several basaltic rocks (dikes and ). The largest of the individual aggregates does not exceed 3 mm in diameter. The olivine displays translation lamellae typical of peridotite olivine. 5 cm ~3). , OE~'~ et al. 1983; I-IART~NN 1986). A more exact classification was not possible due to the limited size and number of inclusions. Short-prismatic-idiomorphic olivine phenocrysts were much more common in the groundmass of the basaltic rocks.

Il( O.! e e l = t - / alkali-s" % O0 . '" . L"/" , fephnte •. ~lt ,~ • ~ phonolite n . s •" "'-. o # phonolite , / s" ..... / trachyte t / I 7' / ......... -1000 t ' ~ trachy- • ,s s J ........... " basalt. ¢ . ~ • ; Lati- I ; f - " ~s~ hawaiite# , andesi-basalt v ~ i basalt mugearite "" - ~-r'" / tholeiite t Il # I .... -"" _ . :'~"" dacite • .... ,,""" rhyodacite quartz* trachyte 10'00 t . - , ~des,e', ~ '#-. . . . ~ s / # • "~-. "- - "" rhyolite ...... ~------. alkali - rhyolite t. . . .

Samples from dike and sample 46/86 (dike

) were not able to be classified due to intense autometamorphism (nc = not classified). , homblende basanite, nepheline, basanite, basanitic alkali-olivine basalt) was not attempted because of the gradual transitions between the individual basalt types found in the working area. The rock of dike classified as a phonolitic tephrite is of particular interest being a product of differentiation. This is seen in the mode of occurrence of the minerals and the degree of variation in the mineralogical and chemical composition within the dike.

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

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