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GEOLOGY OF THE WESTERN PART OF THE CAROLINA TERRANE IN NORTHWESTERN SOUTH CAROLINA of Canada Special Paper 41, in press. Horkowitz, J.P., 1984, Geology of the Philson Crossroads 7.5' quadrangle, South Carolina -- Nature of the boundary separating the Inner Piedmont from the Carolina-Avalon terrane in central northwestern South Carolina [M.S. thesis]: Columbia, University of South Carolina, 100 p. Horton, J.W., Jr., 1981, Shear zones between the Inner Piedmont and Kings Mountain belts in the Carolinas: Geology, v. 9, p. 28- 33. Hudleston, P.J. , 1989, The association of folds and veins in shear zones: Journal of Structural Geology, v. 11, p. 949-957. LaPoint, D., 1995, Gold Deposits of the West Springs area: South Carolina Geology, v. 38, in press. Lumpkin, H., 1981, From Savannah to Yorktown: The American revolution in the South, New York: Paragon House Publishers, 332 p. Medlin, J.H., 1966, Geologic map of the Buffalo pluton, Union County, South Carolina: OFR-10: Columbia, SC, South Carolina Geological Survey. Medlin, J.H., Thornton, C.P. and Gold, D.P., 1972, Petrology of the mafic igneous complexes in the southeastern U.S. Piedmont: II. The Buffalo mafic igneous complex, Union County, South Carolina: Southeastern Geology, v. 14., p. 73-106. Mittwede, S.K., 1988, Road log for stops in the Ora, Pacolet and Pacolet Mills quadrangles, in Secor, D.T., ed., Southeastern Geological Excursions: Columbia, SC: South Carolina Geological Survey, p 250-265. Mittwede, S.K., 1989, Geologic maps of the Pacolet and Pacolet Mills 7.5' quadrangles, South Carolina: OFR-64: Columbia, SC, South Carolina Geological Survey. Mittwede, S.K. and Fullagar, P.D., 1987, Petrology and geochemistry of the Pacolet monzogranite in northwestern South Carolina: Petrogenetic implications [abstract]: Geological Society of America Abstracts with Programs, v. 18, p. 118. Nance, R.D. and Murphy, J.B., 1994, Contrasting basement isotopic signatures and the palinspastic restoration of peripheral orogens: Example from the neoproterozoic Avalonian-Cadomian belt: Geology, v. 22, p. 617-620. Samson, S.L., Palmer, A.R., Robison, R.A., and Secor, D.T., Jr., 1990, Biogeographical significance of Cambrian trilobites from the Carolina slate belt: Geological Society of America Bulletin, v. 102, p. 1459-1470. Secor, D.T., Snoke, A.W., Dallmeyer, R.D., 1986, Character of the Alleghanian orogeny in the southern Appalachians. Part III. Regional Tectonic Relations: Geological Society of America Bulletin, v. 97, p. 1345-1353. Sloan, E., 1908, Catalogue of the mineral localities of South Carolina: South Carolina Geological Survey Bulletin 2, 505 p. Speer, J. A., Brauer, S.V.G., and McSween, H.Y., Jr., 1986, The Bald Rock granitic pluton, South Carolina: Petrography and internal fabric: South Carolina Geology, v. 30, 1-17. Streckeisen, A.L., 1976, To each plutonic rock its proper name: Earth Science Reviews, v. 12, 1-34. van Gelder, S.M. and McSween, H.Y., Jr., 1981, Intrusion of the Bald Rock batholith into the Kings Mountain belt and Charlotte belt rocks, South Carolina, in Horton, J.W., Jr., Butler, J.R., and Milton, D.M., eds., Geological investigations of the Kings Mountain belt and adjacent areas in the Carolinas: Carolina Geological Society Guidebook: Columbia, South Carolina Geological Survey, p. 147-154. Vyhnal, C.R. and McSween, H.Y., Jr., 1990, Constraints on Alleghanian vertical displacements in the southern Appalachian Piedmont, based on aluminum-in-hornblende barometer: Geology, v. 18, p. 938-941. Wagener, H.D., 1977, The granitic stone resources of South Carolina: Mineral Resources Series 5: Columbia, South Carolina Geological Survey, 65 p. Wagener, H.D. and Howell, D.E., 1973, Granitic plutons of the central and eastern Piedmont of South Carolina: Carolina Geological Society Guidebook: Columbia, South Carolina Geological Survey, 25 p. Wilkins, J.K., Shell, G.S., and Hibbard, J.P., 1995, Geologic contrasts across the central Piedmont suture in north-central North Carolina: South Carolina Geology, v. 38, in press. Willis, J. , 1984, Geology of the Cross anchor area: The boundary between the Carolina terrane and the Inner Piedmont in northwestern South Carolina [M.S. thesis]: Columbia, University of South Carolina, p. 61. 21
CAROLINA GEOLOGICAL SOCIETY Guidebook for 1995 Annual Meeting Pages 25-32 GEOLOGIC CONTRASTS ACROSS THE CENTRAL PIEDMONT SUTURE IN NORTH – CENTRAL NORTH CAROLINA James K. Wilkins, Glenn S. Shell, and James P. Hibbard Department of Marine, Earth and Atmospheric Sciences N.C. State University Raleigh, NC 27695 INTRODUCTION The central Piedmont suture (CPS) marks the boundary between two distinct tectonostratigraphic packages in the southern Appalachians, the Piedmont zone and the Carolina zone (Figure 1, Hatcher and Zeitz, 1980; for zonation terminology, see Hibbard and Samson, 1995). This first-order boundary is recognized along much of its length in Georgia to South Carolina by the transition from high grade schists and gneisses with gently dipping foliations in the Piedmont zone (primarily the Inner Piedmont in this region) into lower grade, late Precambrian-Cambrian metaigneous and metasedimentary rocks with steeply dipping foliations in the Carolina zone (primarily the Carolina slate belt and the Charlotte belt). Accompanying this transition is a change in the geophysical signature within each belt (Hatcher and Zietz, 1980). In particular, magnetic signatures in the Piedmont zone are characterized by low frequency patterns relative to higher frequency patterns within the Carolina zone. Similar contrasts in lithologies, structural style, and geophysical signature have recently been recognized across a shear zone separating high grade gneisses from the Carolina zone of north-central North Carolina. These findings have led to a proposal that this boundary represents the northern extension of the CPS (Hibbard, 1993). In many areas the CPS has been affected by later deformation, the effects of which vary quite dramatically. For example, in north-central South Carolina the CPS is deformed into upright, tight folds (Hatcher and others, 1988; Dennis, 1991). Elsewhere the CPS has been overprinted by Alleghanian dextral shear zones (Hooper and Hacher, 1989; Figure 1. Regional map of the four tectonostratigraphic zones of the southern Appalachians, the black box denotes the study area; K= Kiokee belt, PMB = Pine Mtn. Elt, SMA = Sauratown Mtns. Anticlinorium’s, U = Uchee belt (after Hibbard and Samson, 1995). 25
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