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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Buruliuk Formation

Buruliuk Fm

Period:

Permian, Triassic

Age Interval:

Early Permian – Early Triassic (C-T?brl,), MS

Province:
East Tajik (Central Pamir)

Type Locality and Naming

This is the uppermost formation in the Muzkol Gr

Synonym: Burulukskaya suite, Бурулюкская свита, Buruluk Fm

Reference section:

Lithology and Thickness

It is composed of quartzites; containing interbeds of quartz-mica crystalline slates, rarely sandstones and marbles. The incomplete thickness of the suite is 1200 m. The quartzites are medium and fine-grained, light gray and pink, massive or foliated. In the sandstones on bedding planes, wave ripples and shrinkage cracks are observed.

The slates are steel-gray and dark gray, quartz-mica, containing lenses (30 m) of marbles. In the basin of the river Belayuli, in the lower part of the suite, according to B. R. Pashkov (1964b), metabasalts, crystalline tuffs of acidic rocks, alternating in section with quartzites and mica-feldspar-quartz slates are noted.

The Buruliuk Fm completes the section of the Muzkol Gr. In the valley of the river Shatput in the upper parts of the suite, a 300 -meter thickness of medium andcoarse-gravel conglomerates. The pebbles are poorly sorted, but well-rounded and consist of fragments of the Muskol series rocks, cemented by crystalline disten-biotite slates. B. R. Pashkov (1964b) considers that the contacts of these conglomerates with the Buruluk suite are tectonic, and the age of the conglomerates is unclear.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

The schematic strat column indicates the lower contact as Sarylshilin Fm

Upper contact

The schematic strat column indicates the upper contact as Muzkol Gr

Regional extent

It is widespread in the Central Pamir.

GeoJSON

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Fossils

Age

The lithologies of the Buruliuk Fm resemble the clastic Triassic units of the Bozbaital Pangazdjilga fold-thrust belt. The Zrn U-Pb ages demonstrate imbrication/recumbent folds, and the presence of Paleozoic and possibly Triassic strata within the domes. (Rutte et al., 2017). Hence considered early Permian to Early Triassic as the age based on the schematic stratigraphic column.

Age Span:

Beginning stage:

Sakmarian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

293.52

Ending stage:

Olenekian

Fraction up in the ending stage:

1.0

Ending date (Ma):

246.70

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Extracted from Rutte, D., L. Ratschbacher, S. Schneider, K. Stübner, M. A. Stearns, M. A. Gulzar, and B. R. Hacker (2017), Building the Pamir-Tibetan Plateau—Crustal stacking, extensional collapse, and lateral extrusion in the Central Pamir: 1. Geometry and kinematics, Tectonics, 36, 342–384, doi:10.1002/2016TC004293; Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.