Alichur Gr

Cenozoic

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Main source = Baratov, R.B., et al. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Publishing House "Donish", Dushanbe, 269 pp. plus tables. Provided by Dr. Jovid Aminov, Nazarbayev University, Astana, Kazakhstan Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

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Alichur Gr

Period:

Proterozoic

Age Interval:

Neoproterozoic (PR₁?), R1

Province:
SE Tajik (SE Pamir)

Type Locality and Naming

It was distinguished by V. I. Budanov (1964b) as the Alichur complex. B. Ya. Khorova and K. T. Budanova (1965) considered these formations as a "series", but renamed it to the southern Alichur, V. P. Bulin and G. V. Kuznetsov, conducting geological surveys, stratified the Alichur series into four suites, lying on top of each other.

Synonym: Alichurskaya Series, Alichur complex

Reference section:

Lithology and Thickness

Alichur Gr is further divided into 4 formations, they are: Zvordarin Fm (zвордаринская свита), Lyangarskaya Fm (Лянгарская свита), Marganayskaya Fm (Марджанайская свита), Ramaifskaya Fm (Рамаифская свита).

The composition of the Alichur Gr rocks differs from the composition of the Shakhdarin Gr rocks. In the first, the role of marbles and high-alumina rocks is much smaller than in the second, whereas in the Alichur Gr, a significant volume is occupied by quartzites, which are not typical for the Shakhdarin Gr.

Lithology Pattern:

Granitic

Relationships and Distribution

Lower contact

The suite has no stratigraphic relationships with older than Quaternary deposits.

Upper contact

Regional extent

It is developed in the Southwestern Pamir- Rushan, Alichur, and Wakhan ranges. The composition of the Alichur Gr rocks differs from the composition of the Shakhdarin Gr rocks.

GeoJSON

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Fossils

Age

In these formations, deposits of the Lower and Upper Proterozoic are conditionally distinguished. It is assumed that the Middle Proterozoic is absent in Tajikistan. Hence it considered Neoproterozoic for schematic stratigraphic representation purpose.

Age Span:

Beginning stage:

Tonian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

1,000.00

Ending stage:

Ediacaran

Fraction up in the ending stage:

0.8

Ending date (Ma):

558.04

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.