Pakistan Stratigraphy · stratigraphy.pk
Panjgur Formation
https://stratigraphy.pk/formation/panjgur-formation
Panjgur Formation
Oligocene–Early Miocene
Paleogene–Neogene in the time scale →Stratigraphic position
Band colour = period; texture = dominant rock type. Lines between bands mark the contact type. True scale makes height ∝ recorded thickness; hatched = thickness not recorded. Ages approximate, for ordering.
This unit (highlighted) within its province column; faded ends continue above and below. Line style marks the contact type.
The thick Oligocene–Miocene turbidite sandstones that build the ridges of the Makran wedge — the region's main potential gas/oil reservoir.
Major turbidite sequence in Makran. Part of world's largest accretionary wedge complex.
Significance. A very thick Oligocene–Early Miocene turbidite succession of the Khojak–Panjgur submarine-fan complex, the ridge-forming backbone of the Makran accretionary wedge — one of the largest accretionary prisms on Earth, fed by Himalayan-derived (Katawaz delta) detritus.
- Lithology
- Thick cyclic submarine-fan and abyssal-plain turbidites: light-green micaceous, fine- to coarse-grained calcareous sandstone alternating with shale.
- Thickness
- 450–3,000 m
- Type locality
- Panjgur town, north Makran
- Environment
- deep marine, submarine fan
- Introduced by
- HSC (1961)
- Economic importance
- The principal potential RESERVOIR unit of the Makran; its stacked turbidite sandstones have porosities up to ~18% and form exploration targets, with Hoshab/Parkini shales as source and seal.
Fossils
Provinces
References
- Malkani, M.S. & Mahmood, Z. (2017). Stratigraphy of Pakistan. Geological Survey of Pakistan, Memoir Vol. 24.
- Cromie, P. et al. (2022). Tectonostratigraphic Evolution and Hydrocarbon Prospectivity South of Gwadar Bay, Makran Accretionary Wedge, Offshore SW Pakistan. (petroleum-system study).
Reviewer confidence: medium
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