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Discrimination of regionally extensive coals in the Upper Carboniferous of the Pennine Basin, UK using high resolution sequence stratigraphic concepts
304A
GEOLOGY:GENERAL
papers; part I I I - the mining industry status report on environment; part IV - comparative papers; and part V panel discussion. (S.E. Brown) 957009 Environmental impact of iron ore mines in Goa, India D. S. Ratha & G. Venkataraman, International Journal of Environmental Studies, Section A, 47(1), 1995, pp 43-53. Environmental impact assessment studies were carded out in the iron ore mining areas of the Goa region using both qualitative and quantitative methods. From the qualitative approach it was observed that surface excavations and solid waste disposal are more responsible for affecting the enviroumental parameters like soils, land forms, ground water, surface water and flora. From the R-mode factor analysis of chemical data four rotated factors were obtained expressing natural processes and anthropogenic processes. Four groups of samples representing roadsides, mining areas, nonmining areas and high iron content samples were obtained from cluster analysis. (Authors)
GEOLOGY General 957010 European coal geology ed M. K. G. Whateley & D. A. Spears, (Geological Society of London; Special Publication, 82), ISBN (hardback) 1 897799 19 5, price £60.00, 1995, 331 pp, index. The 17 contributions to this volume (abstracted separately) cover various aspects of the coal geology of Europe. The topics covered range from sedimentological, geochemical and exploration models to exploration drilling and economic evaluation of coal deposits, on a local and country-wide scale, as well as the environmental aspects of coal burning and disposal of carbon dioxide. The contributions are grouped into the following sections: exploration and evaluation techniques; geophysical exploration; resources, environment and energy policies; and case histories. (A.W.HalI)
957011 Discrimination of regionally extensive coals in the Upper Carboniferous of the Pennine Basin, UK using high resolution sequence stratigraphic concepts G. Hampson, in: European coal geology, ed M.K.G. Whateiey & D.A. Spears, (Geological Society of London; Special Publication, 82), 1995, pp 79-97. During the late Carboniferous, the Pennine Basin, UK was a thermally subsiding, intracratonic basin with little active tectonism. The sedimentary fill of the basin consists of coarsening-upward coal-bearing deltaic cyclothems bounded by widespread faunal-concentrate condensed horizons. The Yeadonian (Namurian GI) Rough Rock Group comprises three such cyclothems that have been studied at outcrop and in core using detailed sedimentologieal logging and then applying high resolution sequence stratigraphieal concepts. Two regionally extensive coals are present in the Rough Rock Group. They formed under relatively long-lived, basin-wide conditions of: 1) elastic sediment starvation, and 2) rising water-table, creating accommodation space for peats to accumulate and be preserved in mires. These conditions are characteristic of deposition in transgressive systems tracts and in the context of the Rough Rock group sequence stratigraphic framework these coals are identified as up-dip equivalents of initial flooding surfaces. (from Author)
957012 Sedimentary facies of the coal-beating Westphalian A and B north of the Wales - Brabant High P. D. Guion, I. M. Fulton & N. S. Jones, in: European coal geology, ed M.K.G. Whateley & D.A. Spears, (Geological Society of London; Special Publication, 82), 1995, pp 45-78. The formation of coals of sufficient thickness, quality and continuity to be commercially exploited was favoured during the latest Westphalian A and much of the Westphalian B, when deposition took place in an environment similar to an upper delta plain, with limited marine influence. Accurate determination of facies, lithologieal attributes and geometry is an important tool in exploration and mine planning. Sedimentary facies have thus been rationalized into those that may be consistently recognizable in boreholes and mine workings. The characteristics of the following facies are described here: mire, palaeosol, marine, lacustrine, lacustrine delta, major channel, minor channel, overbank and crevasse splay. Channel deposits have a number of adverse effects on mining and the range of channel-fill deposits reflects the operation of many different processes. (from Authors)
957013 The formation of copper-bismuth sulphosalts in sedimentary copper deposits: the Fore-Sudetic Copper Deposit, Poland as an example A. W. Jasinski, Ore Geology Reviews, 9(3), 1994, pp 209-217. The occurrence of Cu-Bi-sulphosalts in the Fore-Sudetic Copper Deposit is described and their formation interpreted using thermodynamic data, in particular with a log ac~-log aei2s3-1ogfs2 diagram for the Cu-Bi-Fe-S system (T = 298 K, p = 1 bar). It appears that the bulk of the Bi in the deposit (mostly in a form of witticbenite) arises from diageneticimpregnating and epigenetic stages of the mineralization. (Author)
957014 Precambrian and Paleozoic gold-bearing series in Kyrgyzstan V. N. Dolzhenko, Geochemistry International, 31(6), 1994, pp 96-104; translated from: Geokhimiya, 11, 1993, pp 16201628. Gold contents have been estimated from 6000 analyses of rocks in 30 Precambrian and Paleozoic associations and complexes in Kyrgyzstan. The highest gold levels o ~ u r in the carbonaceous siliceous, and tuffogene (graywacke) sediments, and also in basic and ultrabasic volcanites. The gold-bearing series were laid down in the main in rift and eugeosyncline structures and in the miogeosyncline period. The gold levels in the series are of metallogenic forecasting significance. (Journal summary)
957015 Chromite deposits of the Kempirsai Massif, southern Urals, Kazakhstan F. Melcher, E. F. Stumpfl & V. Distler, Transactions Institution of Mining & Metallurgy, Section B, 103 (MayAugust), 1994, pp 107-120. Provides an overview of the mineralogy, petrology and geochemistry of the podiform chromite occurrences of the Kempirsai massif and reports on the first platinum-group minerals to have been discovered. The ultramafic massif in the southern Urals, Kazakhstan, contains large chromite bodies of 'Alpine-type', ophiolitic affinity. Orebodies reach thicknesses of 150 m and sizes of more than 150 000 000 t chromite ore with average grades of 55-60 wt% Cr203. Chromites in the Main ore field are low-Al, high-Cr spinels. (from Authors)
GEOLOGY:GENERAL
papers; part I I I - the mining industry status report on environment; part IV - comparative papers; and part V panel discussion. (S.E. Brown) 957009 Environmental impact of iron ore mines in Goa, India D. S. Ratha & G. Venkataraman, International Journal of Environmental Studies, Section A, 47(1), 1995, pp 43-53. Environmental impact assessment studies were carded out in the iron ore mining areas of the Goa region using both qualitative and quantitative methods. From the qualitative approach it was observed that surface excavations and solid waste disposal are more responsible for affecting the enviroumental parameters like soils, land forms, ground water, surface water and flora. From the R-mode factor analysis of chemical data four rotated factors were obtained expressing natural processes and anthropogenic processes. Four groups of samples representing roadsides, mining areas, nonmining areas and high iron content samples were obtained from cluster analysis. (Authors)
GEOLOGY General 957010 European coal geology ed M. K. G. Whateley & D. A. Spears, (Geological Society of London; Special Publication, 82), ISBN (hardback) 1 897799 19 5, price £60.00, 1995, 331 pp, index. The 17 contributions to this volume (abstracted separately) cover various aspects of the coal geology of Europe. The topics covered range from sedimentological, geochemical and exploration models to exploration drilling and economic evaluation of coal deposits, on a local and country-wide scale, as well as the environmental aspects of coal burning and disposal of carbon dioxide. The contributions are grouped into the following sections: exploration and evaluation techniques; geophysical exploration; resources, environment and energy policies; and case histories. (A.W.HalI)
957011 Discrimination of regionally extensive coals in the Upper Carboniferous of the Pennine Basin, UK using high resolution sequence stratigraphic concepts G. Hampson, in: European coal geology, ed M.K.G. Whateiey & D.A. Spears, (Geological Society of London; Special Publication, 82), 1995, pp 79-97. During the late Carboniferous, the Pennine Basin, UK was a thermally subsiding, intracratonic basin with little active tectonism. The sedimentary fill of the basin consists of coarsening-upward coal-bearing deltaic cyclothems bounded by widespread faunal-concentrate condensed horizons. The Yeadonian (Namurian GI) Rough Rock Group comprises three such cyclothems that have been studied at outcrop and in core using detailed sedimentologieal logging and then applying high resolution sequence stratigraphieal concepts. Two regionally extensive coals are present in the Rough Rock Group. They formed under relatively long-lived, basin-wide conditions of: 1) elastic sediment starvation, and 2) rising water-table, creating accommodation space for peats to accumulate and be preserved in mires. These conditions are characteristic of deposition in transgressive systems tracts and in the context of the Rough Rock group sequence stratigraphic framework these coals are identified as up-dip equivalents of initial flooding surfaces. (from Author)
957012 Sedimentary facies of the coal-beating Westphalian A and B north of the Wales - Brabant High P. D. Guion, I. M. Fulton & N. S. Jones, in: European coal geology, ed M.K.G. Whateley & D.A. Spears, (Geological Society of London; Special Publication, 82), 1995, pp 45-78. The formation of coals of sufficient thickness, quality and continuity to be commercially exploited was favoured during the latest Westphalian A and much of the Westphalian B, when deposition took place in an environment similar to an upper delta plain, with limited marine influence. Accurate determination of facies, lithologieal attributes and geometry is an important tool in exploration and mine planning. Sedimentary facies have thus been rationalized into those that may be consistently recognizable in boreholes and mine workings. The characteristics of the following facies are described here: mire, palaeosol, marine, lacustrine, lacustrine delta, major channel, minor channel, overbank and crevasse splay. Channel deposits have a number of adverse effects on mining and the range of channel-fill deposits reflects the operation of many different processes. (from Authors)
957013 The formation of copper-bismuth sulphosalts in sedimentary copper deposits: the Fore-Sudetic Copper Deposit, Poland as an example A. W. Jasinski, Ore Geology Reviews, 9(3), 1994, pp 209-217. The occurrence of Cu-Bi-sulphosalts in the Fore-Sudetic Copper Deposit is described and their formation interpreted using thermodynamic data, in particular with a log ac~-log aei2s3-1ogfs2 diagram for the Cu-Bi-Fe-S system (T = 298 K, p = 1 bar). It appears that the bulk of the Bi in the deposit (mostly in a form of witticbenite) arises from diageneticimpregnating and epigenetic stages of the mineralization. (Author)
957014 Precambrian and Paleozoic gold-bearing series in Kyrgyzstan V. N. Dolzhenko, Geochemistry International, 31(6), 1994, pp 96-104; translated from: Geokhimiya, 11, 1993, pp 16201628. Gold contents have been estimated from 6000 analyses of rocks in 30 Precambrian and Paleozoic associations and complexes in Kyrgyzstan. The highest gold levels o ~ u r in the carbonaceous siliceous, and tuffogene (graywacke) sediments, and also in basic and ultrabasic volcanites. The gold-bearing series were laid down in the main in rift and eugeosyncline structures and in the miogeosyncline period. The gold levels in the series are of metallogenic forecasting significance. (Journal summary)
957015 Chromite deposits of the Kempirsai Massif, southern Urals, Kazakhstan F. Melcher, E. F. Stumpfl & V. Distler, Transactions Institution of Mining & Metallurgy, Section B, 103 (MayAugust), 1994, pp 107-120. Provides an overview of the mineralogy, petrology and geochemistry of the podiform chromite occurrences of the Kempirsai massif and reports on the first platinum-group minerals to have been discovered. The ultramafic massif in the southern Urals, Kazakhstan, contains large chromite bodies of 'Alpine-type', ophiolitic affinity. Orebodies reach thicknesses of 150 m and sizes of more than 150 000 000 t chromite ore with average grades of 55-60 wt% Cr203. Chromites in the Main ore field are low-Al, high-Cr spinels. (from Authors)