The coal bearing Patala Formation (ranges from 5 9O m thick) is composed of dark gray, fossil iferous shale interbedded with white quartzose sandstone, siltstone, marl, and limestone. Coal and carbonaceous shale deposits generally occur as a single bed «1 m thick) that is commonly split by dark gray shale or thin «0.25 m thick) bands of quart zose sandstone. These laterally discontinuous coal and carbonaceous shale beds overlie and are laterally associated with northeasterly trending, elongate, quartzose sandstone bodies (ranges from 1 2O m thick, fig. 2) and are interpreted to have been deposited in back barrier and near marine environments (Alam and others, 1987; Warwick and Shakoor, 1988a,b). METHODS Seventeen of the samples described in this report were collected as core during a drilling program conducted by the Geological Survey of Pakistan in the Eastern Salt Range. Eleven of these samples were shale and carbonaceous shale (sediments that comprise the majority of the coal-bearing Patala Formation) that were collected from drill hole DSM-17 (fig. 2; Appendix-I). Forty three samples were collected as whole bed or bench channel samples from active working faces of 35 underground coal mines in all parts of the Salt Range coal field (Appendix I). Coal and carbonaceous shale channel samples were collected following ASTM (1986) procedures. Roof and floor rock, and partings greater than 1 cm thick were not included in the coal and carbonaceous shale channel and core samples. The proximate and ultimate analytical data reported here was done in the laboratories of Geochemical Testing Incorporated in Somerset, Pennsylvania, and Dickinson Laboratories Incorporated of El Paso, Texas using ASTM <1986) methods. Randomly selected coal and carbonaceous shale samples were analyzed for major , minor , and trace element contents by USGS laboratories in Reston, Virginia using methods described in Golightly and Simon (1989). Correlation coefficients were calculated among trace element, proximate, ultimate, location, and coal bed thickness data. Few samples have a complete set of analytical data; therefore, the number of samples used in each correlation will vary. Sample locations (Areas 1, 2, and 3 on fig. 2) were assigned to the western, central, and eastern parts of the Salt Range coal field. RESULTS
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