Assessing the relative packing behaviour of Chandarpur and Khairagarh sandstones of Proterozoic Chhattisgarh Basin |
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| Authors: | M K Singh |
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| Institution: | (1) Atomic Mineral Division, Department of Atomic Energy, Hyderabad, 500016, India;(2) Atomic Mineral Division, Department of Atomic Energy, Nagpur, 440001, India;(3) Atomic Mineral Division, Department of Atomic Energy, Banglore, 560072, India |
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| Abstract: | The paper concerns mainly with properties of packing of the Proterozoic Chandarpur and Khairagarh sandstones of Chhattisgarh
Basin. An attempt has been made to decipher the nature of boundary between Chandarpur Group and overlying Raipur Group on
the basis of grain packing. For the purpose of study based on eight representative thin sections of Chandarpur and Khairagarh
sandstones, measurements of grain size distribution, types of grain contacts, packing density (Pd), packing proximity (Pp)
and linear regression analysis has been carried out. The relation of packing density with packing proximity of Khairagarh
sandstone shows positive correlation coefficient (r) with linear regression equation (y) and no clear trend in packing proximity
(Pp) vs grain size (Is) is observed whereas Chandarpur sandstone shows packing density increases and packing proximity decreases
with linear regression equation (y) and correlation coefficient (r). Chandarpur grain size tends to increase with packing
density (Pd) whereas packing proximity (Pp) increases but Khairagarh sandstone packing density (Pd) decrease with increase
of grain size (Is) and packing proximity (Pp) tends to increase with decrease in grain size. Above study indicates that packing
behaviour of Chandarpur sandstones and Khairagarh sandstones are entirely different. |
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