Rock-eval pyrolysis, vitrinite reflectance, and kerogen microscopy results from Miocene carbonaceous mudstones and coals in outcrop, McGrath Quadrangle, southwestern Alaska

The Cenozoic Holitna basin is a gravity-defined feature that sits astride the Denali-Farewell fault zone in southwestern Alaska. The basin corresponds to a gravity low in excess of -40 milligals (mGals). No outcrops exist within the footprint of the gravity low and no subsurface data are available; consequently, the stratigraphy and age of its fill are unknown. The Alaska Division of Geological & Geophysical Surveys (DGGS) investigated the shallow gas potential of the basin during the summers of 2000 and 2002 by studying Tertiary coal-bearing rocks exposed along the Denali-Farewell fault zone to the northeast of the basin in the southern McGrath Quadrangle as an outcrop analog to the subsurface stratigraphy of the...

Tags: Coal, Energy, McGrath Quadrangle, Pyrolysis, Resources, All tags... Rock-Eval Pyrolysis, Vitrinite, geoscientificInformation, Fewer tags

Coking coal of the United States: Modern and historical locations of coking coal mining locations and chemical, rheological, petrographic, and other data from modern samples

For the open-file report we collected new coking coal samples from Alabama, Kentucky, Oklahoma and Arkansas and analyzed them for proximate and ultimate analyses; calorific value; sulfur forms; major-, minor-, and trace-element abundances; free swelling indices; Gieseler plasticity; ASTM dilatation; coal petrography, and several other tests [air-dry loss (ADL), residual moisture (RM), equilibrium moisture (EQM), and true specific gravity (TSG)]. Coal Stability Factor (CSF) and Coal Strength after Reaction with CO2 (CSR) were predicted using chemical, rheological, and petrographic data (pCSF and pCSR, respectively). In addition, data from previously analyzed samples in Pennsylvania, West Virginia, Virginia, and Kentucky...

Categories: Data; Tags: Alabama, Arkansas, Arkansas Valley coal field, Boone County, W.Va., CBI, All tags... CSF, CSR, Cambria County, Pa., Central Appalachian basin coal region, Clearfield County, Pa., Coal Strength after Reaction, Coke Stability Factor, Composition Balance Index, Eastern Oklahoma coal field, Elk County, Pa., Energy Resources, Floyd County, Ky., Franklin County, Ala., Gieseler plasticity, HGI, Hardgrove Grindability Index, Indiana County, Pa., Jefferson County, Ala., Kanawha County, W.Va., Kentucky, Logan County, W.Va., McDowell County, W.Va., Mingo County, W.Va., Nicholas County, W.Va., Northern Appalachian basin coal region, Oklahoma, Owsley County, Ky., Pennsylvania, Pike County, Ky., Plateau coal field, Raleigh County, W.Va., SI, Sebastian County, Ark., Somerset County, Pa., Southern Appalachian basin coal region, Strength Index, Tazewell County, Va., USGS Science Data Catalog (SDC), Virginia, Warrior coal field, West Virginia, Winston County, Ala., Wise County, Va., Wyoming County, W.Va., acid to base ratio, air dry loss, alkali index, apparent specific gravity, as received basis, ash, ash fusion, bituminous, calorific value, coal, coking, dilatation, dry ash-free basis, dry basis, dry mineral matter-free basis, equilibrium moisture, fixed carbon, high-volatile, inertinite, liptinite, low-volatile, medium-volatile, mineral matter, moist mineral matter-free basis, organic sulfur, oven-coke, oxidation, proximate, pyritic sulfur, rank, reflectance, residual moisture, semifusinite, short ton, sulfate sulfur, ultimate, vitrinite, volatile matter, Fewer tags