The Association of Amphibolite and Albitite, Kragerø, South Norway
1966; Cambridge University Press; Volume: 103; Issue: 1 Linguagem: Inglês
10.1017/s0016756800050366
ISSN1469-5081
Autores Tópico(s)Geology and Paleoclimatology Research
ResumoAbstract In the Kongsberg-Bamble series of South Norway leucocratic albitites are associated with amphibolites. The plagioclase of the albitites is An 2 -An 13 , that of the amphibolites is commonly An 28 -An 40 . The metamorphic facies is upper almandine amphibolite and the inferred P. T . conditions are about 700° C. and 7,000 to 8,000 bars. Recent experimental work indicates that at these temperatures and pressures amphibolites will begin to melt and the first liquid will be of albitic composition. It is suggested that the albitites owe their origin to the partial fusion of their enclosing amphibolites.
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