Mazzanchut Fm
Period:
Proterozoic
Age Interval:
Ediacaran (Rf? mz), R1
Province:
SE Tajik (SE Pamir)
Type Locality and Naming
It was distinguished in 1949 by B. P. Barhatov, who considered it conditionally Lower Paleozoic.
Synonym: Mazzanchut suite, Маэанчутская свита
Reference section:
Lithology and Thickness
The primary rocks of this suite were likely mainly volcano-clastic; later, they underwent greenstone metamorphosis. The suite is composed of green albite-biotite-actinolite schists, including layers and lenses of white marbles, marbled limestones, mica schists, and amphibolites. The incomplete thickness of the suite is 500 m.
Lithology Pattern:
Volcanic_ash
Relationships and Distribution
Lower contact
Upper contact
Carboniferous (?) - Triassic and Jurassic rocks
Regional extent
It is widespread in the Rushan range.
GeoJSON
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Fossils
No organic remains have been found in it.
Age
B. P. Barhatov, who considered it conditionally Lower Paleozoic. After establishing in 1964-1967 by V. I. Dranov in the Southeastern Pamir conditionally Riphean green schist-metamorphosed sedimentary-volcanic strata underlying the Carboniferous (?) - Triassic and Jurassic rocks (see the description of the Alichur Gr) in the section, he suggested that the Mazzanchut Fm is most likely Riphean. However, until recently, the Mazzanchut Fm was considered part of the conformable section of the Rushan complex, the age of which was initially considered Early Paleozoic (Barhatov, 1949), and then Carboniferous-Permian (Dranov, 1930) and Carboniferous-Triassic (Barhatov, 1963; Kushlin, 1964). Questions about the primary origin of the Mazzanchut Fm, its position in the section, and its age require further research.
Age Span:
Beginning stage:
Ediacaran
Fraction up in beginning stage:
0.8
Beginning date (Ma):
558.04
Ending stage:
Ediacaran
Fraction up in the ending stage:
1.0
Ending date (Ma):
538.80
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Lakhsh district, 276.