Mineral resource assessment of kyanite, sillimanite, and andalusite in the Greenville 1° x 2° quadrangle, South Carolina, Georgia, and North Carolina
No abstract available.
Georgia, North Carolina, South Carolina↗
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Mineral resource assessment of pegmatite minerals in the Greenville 1° x 2° quadrangle, South Carolina, Georgia, and North Carolina
Mineral resources of the Greenville 1° x 2° quadrangle, South Carolina, Georgia, and North Carolina, were assessed between 1984 and 1990 under the Conterminuous United States Mineral Assessment Program (CUSMAP) of the U.S. Geological Survey (USGS). The mineral resource assessments were made on the basis of geologic, geochemical, and geophysical investigations and on the distribution of mines, prospects, and mineral occurrences reported in the literature. This report is an assessment of the minerals associated with mica pegmatites in the Greenville quadrangle. It is based on the geology as mapped by Nelson and others (1989), on field studies conducted from 1952 to 1962 by the USGS for the Defense Minerals Exploration Administration (DMEA) and the concurrent examination of many of the known mica mines and prospects in Georgia, and on the published geologic literature and an unpublished report by K.H. Teague on file with the South Carolina Development Board, Division of Geology, in Columbia, S.C.
Georgia, North Carolina, South Carolina↗
Mineral resource assessment of rare-earth elements, thorium, titanium, and uranium in the Greenville 1° x 2° quadrangle, South Carolina, Georgia, and North Carolina
Mineral resources of the Greenville 1° x 2° quadrangle, South Carolina, Georgia, and North Carolina, were assessed between 1984 and 1990 under the Conterminuous United States Mineral Assessment Program (CUSMAP) of the U.S. Geological Survey (USGS). The mineral resource assessments were made on the basis of geologic, geochemical, and geophysical investigations and the presence of mines, prospects, and mineral occurrences from the literature. This report is an assessment of the rare-earth elements (REE), thorium, titanium, and uranium resources in the Greenville quadrangle and is based on heavy mineral concentrates collected in 1951-54 by the USGS (Overstreet and others, 1968; Caldwell and White, 1973; Cuppels and White, 1973); on the results of the U.S. Department of Energy, National Uranium Resource Evaluation (NURE) sampling program (Ferguson, 1978, 1979); on analyses of stream-sediment and heavy-mineral-concentrate samples (Jackson and Moore, 1992, G.C Cullin, USGS, unpub. data, 1992) on maps showing aerial gamma radiation in the Greenville quadrangle (D.L. Daniels, USGS, unpub. data, 1992); and on the geology as mapped by Nelson and others (1987, 1989).
Georgia, North Carolina, South Carolina↗
Alleghanian development of the Goat Rock fault zone, southernmost Appalachians: Temporal compatibility with the master decollement
The Goat Rock and associated Bartletts Ferry fault zones, which mark the eastern margin of the Pine Mountain Grenville basement massif, are controversial due to the suggestion that they are rare exposed segments of the late Paleozoic southern Appalachian master decollement. The controversy in part stems from reported middle Paleozoic (Acadian) radiometric dates postulated as the time of movement along these fault zones. Ultramylonite samples from the type area at Goat Rock Dam yield a 287 ±15 Ma Rb-Sr isochron interpreted as the time of Sr isotopic rehomogenization during mylonitization. This date is corroborated by Late Pennsylvanian-Early Permian 40 Ar/ 39 Ar mineral ages on hornblende (297-288 Ma) and muscovite (285-278 Ma) from neomineralized and dynamically recrystallized rocks within and straddling the fault zone. These Late Pennsylvanian-Early Permian dates indicate the time of right-slip movement (Alleghanian) along the Goat Rock fault zone, which is compatible with the timing suggested by COCORP for thrusting along the southern Appalachian master decollement.
Georgia, North Carolina, South Carolina↗
Regional ground-water discharge to large streams in the upper coastal plain of South Carolina and parts of North Carolina and Georgia
Base flow was computed to estimate discharge from regional aquifers for six large streams in the upper Coastal Plain of South Carolina and parts of North Carolina and Georgia. Aquifers that sustain the base flow of both large and small streams are stratified into shallow and deep flow systems. Base-flow during dry conditions on main stems of large streams was assumed to be the discharge from the deep groundwater flow system. Six streams were analyzed: the Savannah, South and North Fork Edisto, Lynches, Pee Dee, and the Luber Rivers. Stream reaches in the Upper Coastal Plain were studied because of the relatively large aquifer discharge in these areas in comparison to the lower Coastal Plain. Estimates of discharge from the deep groundwater flow system to the six large streams averaged 1.8 cu ft/sec/mi of stream and 0.11 cu ft/sec/sq mi of surface drainage area. The estimates were made by subtracting all tributary inflows from the discharge gain between two gaging stations on a large stream during an extreme low-flow period. These estimates pertain only to flow in the deep groundwater flow system. Shallow flow systems and total base flow are > flow in the deep system. (USGS)
Georgia, North Carolina, South Carolina↗
Geochemical maps of the Ellicott Rock Wilderness and additions, South Carolina, North Carolina, and Georgia
The Ellicot Rock Wilderness comprises 3,332 acres in parts of Sumter, Nantahala and Chattahoochee National Forests. The Ellicott Rock Extension would expand wilderness boundaries in these national forests by 5,600 acres. The Ellicott Rock Extension, 5,512 acres and the Persimmon Mountain Area, 6,678 acres, are both in Sumter National Forest.
Georgia, North Carolina, South Carolina↗
Aeromagnetic map and selected aeroradiometric data for the Ellicott Rock Wilderness and additions, South Carolina, North Carolina, and Georgia
The aeromagnetic and aeroradiometric data presented herin for the Ellicott Rock Wilderness and additions are taken from an airborne survey that covered a larger area in Georgia, North Carolina and South Carolina, and that was flown in December 1980 and January 1981 under contract to the U.S. Geological Survey. The flight lines were oriented northwest-southeast, approximately perpendicular to the general strike of the geology, at 0.5-mi (0.8-km) separation and at a nominal altitude of 500 ft (150 m) above mean terrain. A small amount of areomagnetic data from previous survey (Riggle and others, 1980) along the southeast edge of the study area is based on east-west flight lines spaced 1 mi (1.6 km) apart. Because of the rugged topography in the region, holding the airplane at a constant elevation abive the terrain was not possible. Actual ground clearance over short distances ranged between about 200 and 1200 ft. The International Geomagnetic Reference Field (IGRF) has been removed from the magnetic data (Barraclough and Fabiano, 1975) and 5000 gammas were added to make all values positive.
Georgia, North Carolina, South Carolina↗
Geologic interpretation of aeromagnetic maps of the coastal plain region of South Carolina and parts of North Carolina and Georgia
No abstract available.
Georgia, North Carolina, South Carolina↗
Aeroradioactivity maps of parts of Georgia, South Carolina, and North Carolina
No abstract available.
Georgia, North Carolina, South Carolina↗
Distribution of coastal black-sands in North Carolina, South Carolina, and Georgia, as mapped from an airplane
Black-sand beach concentrates are more widely distributed along the beaches of North Carolina, South Carolina, and Georgia than has been recorded heretofore, as shown by a map prepared by airplane reconnaissance. The map shows also that the black sands diminish in abundance northward, that their distribution is in part related to the configuration of the shoreline, and that they are found only on beaches along the open sea.
Georgia, North Carolina, South Carolina↗