Trace element concentration of central Appalachian coal beds
- Marshall Miller and Associates, Bluefield, VA (United States)
As a result of more stringent environmental regulations, there is increasing demand for coal beds with lower sulfur and trace element concentrations. Unfortunately, due to technical difficulties associated with the detection of elemental composition in parts-per-million, reliable trace element is scarce. Examination of the U.S.G.S. COALQUAL database of Appalachian coals was conducted for the following metals: antimony, arsenic, chromium, lead, and mercury. Within an area of approximately 14,000 square miles, 1,500 raw (core, underground and surface mine) coal samples with geographic coordinates were examined, and more than 100 named coal seams from Tennessee, southern West Virginia, eastern Kentucky, and southwestern Virginia were investigated. Some samples were obtained from formerly active mines which have since been depleted. Researchers have identified approximately 80 coal-related minerals including clays, carbonates, phosphates, chlorides, silicates, sulfates, and sulfides and, of these, sulfides have been found in chemical association with some trace elements. Quality trends over a broad region provide insights into geochemical and depositional processes which may have influenced trace element content. Furthermore, recently published E.P.R.I. data from {open_quotes}as-shipped{close_quotes} coal samples (located by state only) demonstrate similar patterns at the state level. Analysis of these data generally indicates a geographic and stratigraphic preference for coal beds with lower levels of trace elements along the southern edge of the Appalachian coal fields. While these quality trends may be a reasonably good first approximation, additional sampling is needed in minable reserve areas to further identify coal seams which possess favorable trace metal concentrations.
- OSTI ID:
- 411941
- Report Number(s):
- CONF-9610180-; ISSN 0149-1423; TRN: 96:005901-0073
- Journal Information:
- AAPG Bulletin, Vol. 80, Issue 9; Conference: American Association of Petroleum Geologists (AAPG) gulf coast association of geological societies meeting, San Antonio, TX (United States), 2-4 Oct 1996; Other Information: PBD: Sep 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Depositional models in coal exploration and mine planning in Appalachian region
Northern and Central Appalachian region assessment: The Pittsburgh coal bed