Source provenance
Qureshi, M.K.A., Ghazi, S. & Butt, A.A. (2006). Geology of the Lower Jurassic Datta Formation, Kala Chitta Range, Pakistan. Geological Bulletin of the Punjab University, 40-41, 27-44.
Cited by 1 unit (1 published) · 0 field-level citations · 1 revision note.
Mapping, lithostratigraphy and clay mineralogy of the Lower Jurassic Datta Formation in the Kala Chitta Range (Surg, Chak Jabbi, Sakhi Zindapir). Five lithosomes (ironstone/laterite, ferruginous sandstone, quartzose sandstone, bauxite, fireclay) fill karstic pouches on the Kingriali surface; SEM/wet-chemical/DTA/XRD show kaolinite + diaspore (± gibbsite, hematite, goethite) with Al2O3 to ~79%. The high-temperature diaspore/hematite assemblage indicates deeper burial and dynamic metamorphism during Himalayan deformation; continental low-stand sedimentation sourced from weathered Indian-shield (Kirana/Sargodha) basement.
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Units citing this source
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- Economic importance: In the Kala Chitta Range the Datta Formation is a continental low-stand succession — ironstone/laterite, ferruginous and quartzose sandstone, bauxite and fireclay — filling karstic pouches on the Kingriali surface (Qureshi et al., 2006). The aluminous clays are dominated by kaolinite and diaspore (± gibbsite, hematite, goethite) with Al2O3 up to ~79%; the high-temperature diaspore/hematite assemblage reflects deeper burial and dynamic metamorphism during Himalayan deformation, and sediment was sourced from weathered Indian-shield (Kirana/Sargodha) basement.