Burchakyrtau Fm
Period:
Silurian
Age Interval:
Wenlock, Z4
Province:
Zarafshan-N.Gissar
Type Locality and Naming
Along Burchakyr Mountain, western part of the Kara-Tyube Mountains. V.S. Korsakov et al., (1960f.).
Synonym: Burchakyrtau Suite, Бурчакыргауская св.
Lithology and Thickness
Dolomites, limestones with layers of cherts and horizons of siliceous-carbonate rocks. Tungsten mineralization is associated with quartz-vesuvian skarns, and manganese manifestations are associated with cherts. Thickness 350-360m
Lithology Pattern:
Dolomitic limestone
Relationships and Distribution
Lower contact
The boundary with the underlying Atkamar Fm is normally stratigraphic
Upper contact
With a gradual transition; the upper boundary is unknown.
Regional extent
Kara-Tyube Mountains
GeoJSON
null
Fossils
Age
The Wenlock age is accepted based on lithological comparison with the Katadjar Fm and Terikbabin Fm of the Zirabulak-Ziaetdin Mountains according to their position in the section (Korsakov et al., 1984f.). Previously, these deposits were distinguished as "Wenlockian" (Korsakov et al., 1984f.). On the State Geological Map-500 of Uzbekistan (460) - lower Silurian, Wenlock stage.
Age Span:
Beginning stage:
Sheinwoodian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
432.93
Ending stage:
Homerian
Fraction up in the ending stage:
1.0
Ending date (Ma):
426.74
Depositional setting
Depositional pattern:
Additional Information
Compiler:
V.S. Korsakov – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”