DOCSLIB.ORG

Neoproterozoic to Mesozoic Petrologic and Ductile-Brittle Structural

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Neoproterozoic to Mesozoic Petrologic and Ductile-Brittle Structural The Geological Society of America Field Guide 29 2012 Neoproterozoic to Mesozoic petrologic and ductile-brittle structural relationships along the Alleghanian Nutbush Creek fault zone and Deep River Triassic basin in North Carolina David E. Blake Department of Geography and Geology, University of North Carolina Wilmington, 601 S. College Road, Wilmington, North Carolina 28403-5944, USA Edward F. Stoddard North Carolina Geological Survey, 1620 Mail Service Center, Raleigh, North Carolina 27699-1620, USA, and Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, North Carolina 27695-8208, USA Philip J. Bradley North Carolina Geological Survey, 1620 Mail Service Center, Raleigh, North Carolina 27699-1620, USA Timothy W. Clark Wake Technical Community College, 9101 Fayetteville Road, Raleigh, North Carolina 27603, USA ABSTRACT The focus of this fi eld trip is the complex lithologic, metamorphic and structural transition between high-grade infrastructural and low-grade suprastructural ter- ranes that defi ne the accreted peri-Gondwanan Neoproterozoic-Cambrian Carolina Zone, an island-arc superterrane in the north-central Piedmont of North Carolina. This transition is now exposed across a metamorphic suite of amphibolite facies lay- ered gneiss plus kyanite-sillimanite zone pelitic schist, and another metamorphic suite of greenschist facies mylonitic and phyllonitic metagranitoids and their unde- formed equivalents. A variety of mineral assemblages, fabric elements, and struc- tures within the transition zone may be linked into a progressive sequence recording (1) the transpressional buildup of an Alleghanian collision zone between Laurentia, the Carolina Zone, and Gondwana during Pangean continental amalgamation, and (2) its extensional collapse during the Permo-Triassic through Jurassic rifting and breakup of Pangea. We will observe the effects of Alleghanian ductile strain superposed on this infrastructural-suprastructural terrane transition, including the interplay between *[email protected]; [email protected]; [email protected]; [email protected] Blake, D.E., Stoddard, E.F., Bradley, P.J., and Clark, T.W., 2012, Neoproterozoic to Mesozoic petrologic and ductile-brittle structural relationships along the Alleghanian Nutbush Creek fault zone and Deep River Triassic basin in North Carolina, in Eppes, M.C., and Bartholomew, M.J., eds., From the Blue Ridge to the Coastal Plain: Field Excursions in the Southeastern United States: Geological Society of America Field Guide 29, p. 219–261, doi:10.1130/2012.0029(07). For permission to copy, contact [email protected]. © 2012 The Geological Society of America. All rights reserved. 219 220 Blake et al. dextral transpression and the generation of syn- to post-kinematic granitic plutons. Metamorphosed volcanogenic and syn-kinematic granitoid rocks record the effects of ductile dextral-slip deformation associated with at least four major fault zones. These fault zones are combined as the Nutbush Creek–Lake Gordon fault system, an integral member of the Eastern Piedmont fault system. Finally, the trip highlights the ductile-brittle effects of Late Permian to Triassic normal-slip faulting, uplift and rift sedimentation in the northern Durham sub-basin of the Triassic Deep River rift basin, as well as crosscutting Jurassic intrusive rocks. INTRODUCTION and structures in north-central North Carolina. The region lying between the capital city of Raleigh and Kerr Lake Recreation The starting point for much of the modern geologic map- Area located along the North Carolina–Virginia state line has ping in the transition from the eastern to central Piedmont been the primary focus of these mapping efforts. Noted for its in north-central North Carolina involves the work of Parker 800 miles of shoreline (www.ncparks.gov), Kerr Lake State Rec- (1968, 1978, 1979). He showed that the region is composed reation Area, together with major southeast-fl owing tributaries to of a variety of rock types and metamorphic assemblages that the Tar River and Falls Lake–Neuse River drainage basins to its are overprinted by multiple ductile and brittle deformations. south provide abundant erosional exposures. These will be used Parker’s mapping served as the basis for lithologic contacts on this two-day fi eld trip to examine rocks representing mid-to- in north-central North Carolina on the most recent version of upper-crustal levels in cross-strike and along-strike traverses and the state geologic map (North Carolina Geological Survey, the geologic transition between the eastern and central Piedmont. 1985). It also served as the foundation for a major regional Outcrops in this transition expose varying scales of windows into geologic overview by Farrar (1985a, 1985b), who presented a Neoproterozoic to Jurassic crystalline and sedimentary rocks. synopsis of the stratigraphy, structure, and metamorphic his- They also provide a view of the low- to medium-grade metamor- tory of the eastern Piedmont based on his own reconnaissance- phism and ductile-brittle fault zone relationships and structures level geologic mapping and sampling. In continuity with the associated with the transition from Paleozoic transpressional regional studies by Farrar, Harris and Glover (1988) provide a orogenesis to Mesozoic extensional rifting of eastern North synopsis of the stratigraphic, structural, and metamorphic devel- America. These events document the fi nal pulses of Laurentian- opment of the northeastern portion of the central Piedmont based Gondwanan amalgamation and subsequent breakup of the Pan- upon regional fi eld studies and stratigraphic correlations. gean supercontinent. Additional geologic mapping across the eastern-to-central The study area is separated into amphibolite (infrastructural) Piedmont transition in the north-central North Carolina includes and greenschist facies (suprastructural) terranes that lie within a fi ve-county NCGS reconnaissance map by McDaniel (1980), the orogen-scale, Neoproterozoic-Cambrian Carolina Zone, a the USGS 1:100K South Boston sheet geologic map by Hor- peri-Gondwanan island-arc superterrane (Fig. 1). Specifi cally, ton et al. (1993a; 2001), an east-west strip of four USGS 1:24K the fi eld trip will focus upon the complex petrologic transition geologic maps along the North Carolina–Virginia state line by from deeper infrastructural to shallower suprastructural terranes. Sacks (1996a, 1996b, 1996c, 1996d), as well as the fi eldwork of This transition is now exposed across a suite of amphibolite facies Cook (1963), Carpenter (1970), Hadley (1973, 1974), McCon- layered gneiss and kyanite-sillimanite zone pelitic schist, and nell (1974), McConnell and Glover (1982), Hoffman and Gal- greenschist facies mylonitic and phyllonitic metagranitoids and lagher (1989), and Gottfried et al. (1991). Several studies pro- their undeformed equivalents. We will observe the superposed viding additional geologic mapping include those focused on the effects of Pennsylvanian–Early Permian, Alleghanian orogeny Hamme tungsten deposit in the central Piedmont (Parker, 1963; ductile-brittle strain on this terrane transition, including the inter- Casadevall and Rye, 1980; Foose et al., 1980; LeHuray, 1989), play between dextral-slip transpression and generation of syn- and on the late Paleozoic, Alleghanian Nutbush Creek fault zone to post-kinematic granitic plutons. Finally, the trip highlights in the eastern Piedmont (Casadevall, 1977; Hatcher et al., 1977; ductile-brittle effects of Permo-Triassic normal-slip faulting, and Bobyarchick, 1981; Druhan, 1983; Druhan et al., 1994) then uplift and rift sedimentation linked to the Durham sub-basin Since the completion of the regional mapping by Farrar and of the Triassic Deep River basin, as well as crosscutting Jurassic then by Harris and Glover, the central and eastern Piedmont has diabase intrusive bodies. been the subject of 27 years of detailed geologic mapping of all From north to south, as well as east to west, fi eld trip stops or parts of over 50 1:24K quadrangles in the Raleigh and Hender- are located within the John H. Kerr Dam, Middleburg, Hender- son 1:100K sheets, largely from the efforts of the North Carolina son, Oxford, Wilton, and Lake Michie 1:24K Quadrangles (Figs. Geological Survey (NCGS). Detailed NCGS geological map- 2, 3, and 4). This fi eld trip honors the 75th anniversary of the ping under the USGS-administered STATEMAP and EDMAP establishment of the Carolina Geological Society and its contri- programs has added clarity to our understanding of rock types bution to our understanding of southern Appalachian geology. Alleghanian Nutbush Creek fault zone and Deep River Triassic basin 221 Figure 1. Tectonostratigraphic element map of suprastructural and infrastruc- tural terranes within the Carolina Zone of the southern Appalachian orogen. Suprastructral elements include the Milledgeville (MT), Augusta (AT), Roanoke Rapids (RR), Spring Hope (SH), Carolina (CT), and Easternmost Carolina (ECT) terranes. Infrastruc- tural elements include the Uchee (UT), Savannah River (SR), Dreher Shoals (DS), Falls Lake (FLT), Triplet (TT), Warren (WT), Raleigh (RT), Crabtree (CRT), and Charlotte (CHT) terranes. VA—Virginia; TN—Tennessee; NC— North Carolina; AL—Alabama; GA— Georgia; SC—South Carolina. Modifi ed from Hibbard and Samson (1995) and Hibbard et al. (2002). Figure 2. Regional geologic setting of the northeastern Carolina Zone show- ing tectonostratigraphic terranes, Dur- ham sub-basin (Dsb) of the Deep River Mesozoic
Load more

Recommended publications
  • Detrital Zircon Provenance and Lithofacies Associations Of
    geosciences Article Detrital Zircon Provenance and Lithofacies Associations of Montmorillonitic Sands in the Maastrichtian Ripley Formation: Implications for Mississippi Embayment Paleodrainage Patterns and Paleogeography Jennifer N. Gifford 1,*, Elizabeth J. Vitale 1, Brian F. Platt 1 , David H. Malone 2 and Inoka H. Widanagamage 1 1 Department of Geology and Geological Engineering, University of Mississippi, Oxford, MS 38677, USA; [email protected] (E.J.V.); [email protected] (B.F.P.); [email protected] (I.H.W.) 2 Department of Geography, Geology, and the Environment, Illinois State University, Normal, IL 61790, USA; [email protected] * Correspondence: jngiff[email protected]; Tel.: +1-(662)-915-2079 Received: 17 January 2020; Accepted: 15 February 2020; Published: 22 February 2020 Abstract: We provide new detrital zircon evidence to support a Maastrichtian age for the establishment of the present-day Mississippi River drainage system. Fieldwork conducted in Pontotoc County,Mississippi, targeted two sites containing montmorillonitic sand in the Maastrichtian Ripley Formation. U-Pb detrital zircon (DZ) ages from these sands (n = 649) ranged from Mesoarchean (~2870 Ma) to Pennsylvanian (~305 Ma) and contained ~91% Appalachian-derived grains, including Appalachian–Ouachita, Gondwanan Terranes, and Grenville source terranes. Other minor source regions include the Mid-Continent Granite–Rhyolite Province, Yavapai–Mazatzal, Trans-Hudson/Penokean, and Superior. This indicates that sediment sourced from the Appalachian Foreland Basin (with very minor input from a northern or northwestern source) was being routed through the Mississippi Embayment (MSE) in the Maastrichtian. We recognize six lithofacies in the field areas interpreted as barrier island to shelf environments. Statistically significant differences between DZ populations and clay mineralogy from both sites indicate that two distinct fluvial systems emptied into a shared back-barrier setting, which experienced volcanic ash input.
    [Show full text]
  • Detrital Zircon Ages and Nd Isotopic Data from the Southern Appalachian
    Geological Society of America Memoir 197 2004 Detrital zircon ages and Nd isotopic data from the southern Appalachian crystalline core, Georgia, South Carolina, North Carolina, and Tennessee: New provenance constraints for part of the Laurentian margin Brendan R. Bream* Robert D. Hatcher Jr. Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, Tennessee 37996-1410, USA Calvin F. Miller Department of Geology, Vanderbilt University, Nashville, Tennessee 37235, USA Paul D. Fullagar Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599-3315, USA ABSTRACT Sedimentary and metasedimentary rocks within the southern Appalachian Blue Ridge and Inner Piedmont contain a valuable record of Late Proterozoic Laurentian margin evolution following the breakup of Rodinia. Paleogeographic reconstructions and increasing amounts of geochronologic and isotopic data limit the derivation of these paragneisses to the Laurentian and/or west Gondwanan craton(s). Southern ε Appalachian crystalline core paragneiss samples have Nd values between –8.5 and –2.0 at the time of deposition and contain abundant 1.1–1.25 Ga zircon cores with Grenville 1.0–1.1 Ga metamorphic rims. Less abundant detrital zircons are pre-Grenvillian: Mid- dle Proterozoic 1.25–1.6 Ga, Early Proterozoic 1.6–2.1 Ga, and Late Archean 2.7–2.9 ε Ga. Blue Ridge Grenvillian basement has almost identical Nd values and displays the same dominant magmatic core and metamorphic rim zircon ages. Based on our data, nonconformable basement-cover relationships, and crustal ages in eastern North Amer- ica, we contend that the extensive sedimentary packages in the southern Appalachian ε Blue Ridge and western Inner Piedmont are derived from Laurentia.
    [Show full text]
  • Detrital Zircon Provenance and Correlation of Two Newly Discovered Ripley Formation Bentonites: Pontotoc County, Mississippi
    University of Mississippi eGrove Electronic Theses and Dissertations Graduate School 2019 Detrital Zircon Provenance and Correlation of Two Newly Discovered Ripley Formation Bentonites: Pontotoc County, Mississippi Elizabeth Jayne Vitale University of Mississippi Follow this and additional works at: https://egrove.olemiss.edu/etd Part of the Geology Commons Recommended Citation Vitale, Elizabeth Jayne, "Detrital Zircon Provenance and Correlation of Two Newly Discovered Ripley Formation Bentonites: Pontotoc County, Mississippi" (2019). Electronic Theses and Dissertations. 1707. https://egrove.olemiss.edu/etd/1707 This Thesis is brought to you for free and open access by the Graduate School at eGrove. It has been accepted for inclusion in Electronic Theses and Dissertations by an authorized administrator of eGrove. For more information, please contact [email protected]. DETRITAL ZIRCON PROVENANCE AND CORRELATION OF TWO NEWLY DISCOVERED RIPLEY FORMATION BENTONITES: PONTOTOC COUNTY, MISSISSIPPI A Thesis Presented in partiAl fulfillment of requirements for the degree of MAster of Science in the Department of Geology and GeologicAl Engineering The University of Mississippi by ELIZABETH J. VITALE MAy 2019 Copyright © 2019 ElizAbeth J VitAle ALL RIGHTS RESERVED ABSTRACT TWo neWly discovered bentonite deposits in northern and southern Pontotoc County, Mississippi occur in the Upper CretAceous outcrop in a banded pattern on the northeAstern mArgin of the Mississippi Embayment (MSE). The entire Ripley FormAtion (Fm) consists of ~73 m of fossiliferous clAy, sAnd, and cAlcAreous sAnd beds. The bentonites are locAted stratigraphicAlly within the ChiWApa SAndstone Member (CSM) at the top of the Ripley Fm and stratigraphicAlly lie above previously mined bentonites in central Pontotoc County. Since the northern and southern bentonites differ stratigraphicAlly from the previously mined bentonites, it is possible that there are other unknown bentonite deposits throughout Pontotoc County.
    [Show full text]
  • Geochemistry of Volcanic Rocks of the Carolina and Augusta Terranes in Central South Carolina: an Exotic Rifted Volcanic Arc?
    SP304-14.QXD 5/15/96 04≈42 PM Page 219 Geological Society of America Special Paper 304 1996 Geochemistry of volcanic rocks of the Carolina and Augusta terranes in central South Carolina: An exotic rifted volcanic arc? John W. Shervais, Suzanne A. Shelley*, and Donald T. Secor, Jr. Department of Geological Sciences, University of South Carolina, Columbia, South Carolina 29208 ABSTRACT This chapter presents new whole-rock, major- and trace-element geochemical data from the Carolina and Augusta terranes in South Carolina. Geochemical data from the Persimmon Fork and Richtex Formations strongly confirm the interpreta- tion of previous workers that the Carolina terrane is a remnant of a subduction- related volcanic arc. These data further suggest that the arc developed either on top of an older arc or on a thinned section of continental crust. Geochronological data from the southern Appalachians indicate that the subduction-related arc in the Carolina terrane developed simultaneously with the initial opening of Iapetus, the “Proto- Atlantic” Ocean. Therefore, the arc could not have formed in the Iapetus Ocean basin, and must be exotic relative to cratonic North America. INTRODUCTION The southern Appalachian Piedmont is widely interpreted as a collage of tectonostratigraphic terranes (Fig. 1) accreted to Laurentia (North America) during the Paleozoic (Williams and Hatcher, 1982, 1983; Horton et al., 1989, 1991). The paleogeo- graphic histories of most of the terranes are uncertain because Paleozoic penetrative deformation and regional metamorphism have erased fossils and primary paleomagnetism that might oth- erwise yield paleogeographic information. However, the Caro- lina terrane has been interpreted as exotic with respect to Laurentia because it contains an Atlantic Province trilobite fauna of Middle Cambrian age (Secor et al., 1983).
    [Show full text]
  • Paleozoic Evolution of Pre-Variscan Terranes: from Gondwana to the Variscan Collision
    Geological Society of America Special Paper 364 2002 Paleozoic evolution of pre-Variscan terranes: From Gondwana to the Variscan collision Gérard M. Stamp×i Institut de Géologie et Paléontologie, Université de Lausanne, CH-1015 Lausanne, Switzerland Jürgen F. von Raumer Institut de Minéralogie et Pétrographie, Université de Fribourg, CH-1700 Fribourg, Switzerland Gilles D. Borel Institut de Géologie et Paléontologie, Université de Lausanne, CH-1015 Lausanne, Switzerland ABSTRACT The well-known Variscan basement areas of Europe contain relic terranes with a pre-Variscan evolution testifying to their peri-Gondwanan origin (e.g., relics of Neo- proterozoic volcanic arcs, and subsequent stages of accretionary wedges, backarc rift- ing, and spreading). The evolution of these terranes was guided by the diachronous subduction of the proto-Tethys oceanic ridge under different segments of the Gond- wana margin. This subduction triggered the emplacement of magmatic bodies and the formation of backarc rifts, some of which became major oceanic realms (Rheic, paleo- Tethys). Consequently, the drifting of Avalonia was followed, after the Silurian and a short Ordovician orogenic event, by the drifting of Armorica and Alpine domains, ac- companied by the opening of the paleo-Tethys. The slab rollback of the Rheic ocean is viewed as the major mechanism for the drifting of the European Variscan terranes. This, in turn, generated a large slab pull force responsible for the opening of major rift zones within the passive Eurasian margin. Therefore, the µrst Middle Devonian Variscan orogenic event is viewed as the result of a collision between terranes detached from Gondwana (grouped as the Hun superterrane) and terranes detached from Eurasia.
    [Show full text]
  • Kings Mountain National Military Park Geologic Resources Inventory Report
    National Park Service U.S. Department of the Interior Natural Resource Program Center Kings Mountain National Military Park Geologic Resources Inventory Report Natural Resource Report NPS/NRPC/GRD/NRR—2009/129 THIS PAGE: The Centennial Monument erected in 1880 was the result of a massive effort by descendents and state governments to recognize those who fought at the Battle of Kings Mountain. ON THE COVER: The monadnock known as Kings Mountain was the scene of the 1780 Battle of Kings Mountain. The rocky slopes helped provide cover for the patriot forces as they enciencircledrcled the loyalist forces under Major Patrick Ferguson. NPS Photos courtesy Chris Revels (Kings Moun- tain NMP) Kings Mountain National Military Park Geologic Resources Inventory Report Natural Resource Report NPS/NRPC/GRD/NRR—2009/129 Geologic Resources Division Natural Resource Program Center P.O. Box 25287 Denver, Colorado 80225 September 2009 U.S. Department of the Interior National Park Service Natural Resource Program Center Denver, Colorado The Natural Resource Publication series addresses natural resource topics that are of interest and applicability to a broad readership in the National Park Service and to others in the management of natural resources, including the scientific community, the public, and the NPS conservation and environmental constituencies. Manuscripts are peer-reviewed to ensure that the information is scientifically credible, technically accurate, appropriately written for the intended audience, and is designed and published in a professional manner. Natural Resource Reports are the designated medium for disseminating high priority, current natural resource management information with managerial application. The series targets a general, diverse audience, and may contain NPS policy considerations or address sensitive issues of management applicability.
    [Show full text]
  • Geological Setting of the Reed Gold Mine, North Carolina
    GEOLOGICAL SETTING OF THE REED GOLD MINE, NORTH CAROLINA By Stephen Challener* [email protected] James Hibbard** [email protected] Dept. of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, North Carolina 27695 *now at: 705 Hunting Ridge Rd., Raleigh, NC 27615, **Emeritus, now at 1916 Lost Cove Lane, Raleigh, NC 27603 NORTH CAROLINA GEOLOGICAL SURVEY SPECIAL PUBLICATION 13 23 December 2020 Suggested citation: Challener, S. and Hibbard, J., 2020, Geological setting of the Reed Gold Mine, North Carolina, North Carolina Geological Survey Special Publication 13, 40p. CONTENTS FOREWORD …………………………………………………………………………4 ABSTRACT …………………………………………………………………………4 INTRODUCTION …………………………………………………………………………4 Historical Context …………………………………………………………………6 Regional Geological Context …………………………………………………8 Previous Work at the Reed Gold Mine ………………………………………..10 SCOPE OF STUDY ………………………………………………………………..10 Mapping Observations ………………………………………………………..11 Unseparated Albemarle Group ………………………………………..13 Laminated argillite ………………………………………………..13 Tuffaceous argillite ………………………………………………..13 Massive argillite ………………………………………………..14 Slaty argillite ………………………………………………..14 Chloritic argillite ………………………………………………..15 Volcaniclastic conglomerate ………………………………………..15 Reed Gold Mine Gabbro ………………………………………………..16 Distribution ………………………………………………………..17 Description ………………………………………………………..18 Age ………………………………………………………..18 Geochemistry of the Reed Gold Mine Gabbro ………………………………..19 Sampling and Preparation ………………………………..19 Analytical Methods
    [Show full text]
  • Geochemistry) University of Arizona, May 1990, Advisor: P
    SCOTT D. SAMSON Department of Earth Sciences Syracuse University Syracuse, NY 13244-1070 Education: Ph.D. (Geochemistry) University of Arizona, May 1990, Advisor: P. Jonathan Patchett M.S. (Geology) University of Minnesota, December 1986, Advisor: E.C. Alexander B.S. (Geology) Oregon State University, March 1984 Experience: Professor of Earth Sciences, Syracuse University, 2004- present Jessie Page Heroy Professor/Department Chairman, 2002 – 2007 Associate Professor of Earth Sciences, 1997 − 2004 Assistant Professor of Geology, Syracuse University, 1990 − 1997 Teaching Experience UNDERGRADUATE ONLY COURSES (one course taught every year) EAR 101 (Dynamic Earth) EAR 106 (Environmental Geology) EAR 390 (Analytical Techniques in Geology) COMMUNICATION DESIGN 352 (co-taught)/College of Visual and Performing Arts: How the Earth Works (design a museum quality display for the Earth Sciences Department) FRESHMAN FORUM 100 (course for first year students – discuss current events) UNDERGRADUATE + GRADUATE COURSES (Taught once per year) EAR 400/600 (Advanced topics in Geochemistry/topic varies each year) EAR 400/600 – Geochemical patterns of major events on Earth (co-taught with Dr. Linda Ivany) EAR 417/617 (Inorganic Geochemistry) GRADUATE COURSES (Taught once a year) EAR 600 (Radiogenic Isotope Geochemistry) EAR 600 (Geochronology ) EAR 600 (Stable isotope Geochemistry) Analytical Experience I have extensive experience with the following instruments: Thermal ionization mass spectrometers (TIMS), laser ablation inductively coupled plasma mass spectrometers (LA-ICPMS), sensitive high resolution ion microprobe (SHRIMP), electron microprobe analyzer (EMP), X-ray fluorescence spectrometers (XRF). I have 25 years of experience in isotope geochemistry and ultraclean laboratory protocols. Editorial Experience: Editorial Board of GEOLOGY (1991−1994), Reviewer for following journals: Geology, GSA Bull; Canadian J.
    [Show full text]
  • Preliminary Tectonostratigraphic Terrane Map of the Central and Southern Appalachians
    DEPARTMENT OF THE INTERIOR TO ACCOMPANY MAP I-2163 U.S. GEOLOGICAL SURVEY PRELIMINARY TECTONOSTRATIGRAPHIC TERRANE MAP OF THE CENTRAL AND SOUTHERN APPALACHIANS By J. Wright Horton, Jr., Avery Ala Drake, Jr., Douglas W. Rankin, and R. David Dallmeyer INTRODUCTION shown separately because they are stratigraphically and structurally isolated from other parts of Laurentia. These are native (not A tectonostratigraphic terrane is a fault-bounded geologic accreted) terranes. entity of regional extent characterized by an internally homoge­ The internal continental terranes of the Appalachian orogen are neous stratigraphy and geologic history that is different from that of isolated massifs of Middle Proterozoic (Grenvillian) continental contiguous terranes (Jones and others, 1983a, 1983b; see also basement and their cover sequences that are located within the Irwin, 1972). Coney and others (1980, p. 329) note that " ... the metamorphic core of the orogen and now exposed within struc­ identification of a terrane is based primarily on its stratigraphy and tural windows. These terranes include the Baltimore terrane (ib) in rieed not carry any genetic or even plate tectonic implication. At Maryland and Pennsylvania, the Sauratown terrane (is) in North the start of investigations, the identified terranes are simply con­ Carolina and southern Virginia, and the Pine Mountain terrane (ip) sidered as domains in the descriptive sense." in Alabama and Georgia. They could represent either outliers, Tectonostratigraphic terranes that constitute parts of the possibly themselves allochthonous, of Laurentia, or microconti­ Appalachian orogen appear to have evolved independently of nental fragments of Laurentian crust displaced by rifting or tran­ Proterozoic North America (Laurentia) and to have been accreted scurrent faulting and later reassembled.
    [Show full text]
  • Permian to Cretaceous Evolution of the Piedmont Along The
    PERMIAN TO CRETACEOUS EVOLUTION OF THE PIEDMONT ALONG THE ALABAMA – GEORGIA COASTAL PLAIN UNCONFORMITY Except where reference is made to the work of others, the work described in this thesis is my own or was done in collaboration with my advisory committee. This thesis does not include proprietary or classified information. ______________________________ Nathaniel Timothy Layfield Certificate of Approval: _________________________ _________________________ Mark G. Steltenpohl Willis E. Hames, Chair Professor Professor Geology and Geography Geology and Geography _________________________ _________________________ Lorraine W. Wolf George T. Flowers Professor Dean Geology and Geography Graduate School PERMIAN TO CRETACEOUS EVOLUTION OF THE PIEDMONT ALONG THE ALABAMA – GEORGIA COASTAL PLAIN UNCONFORMITY Nathaniel Timothy Layfield A Thesis Submitted to the Graduate Faculty of Auburn University in Partial Fulfillment of the Requirements for the Degree of Master of Science Auburn, Alabama August 10, 2009 PERMIAN TO CRETACEOUS EVOLUTION OF THE PIEDMONT ALONG THE ALABAMA – GEORGIA COASTAL PLAIN UNCONFORMITY Nathaniel Timothy Layfield Permission is granted to Auburn University to make copies of this thesis at its discretion, upon request of individuals or institutions and at their expense. The author reserves all publication rights. ______________________________ Signature of Author ______________________________ Date of Graduation iii VITAE Nathaniel Timothy Layfield, son of James and Nancy Layfield, was born on October 2, 1984, in Birmingham, Alabama. He graduated from Hewitt-Trussville High School in Trussville, Alabama in 2003. He attended Auburn University and graduated summa cum laude with a Bachelor of Science degree in Geology in August 2007. After graduation, he immediately entered graduate school at Auburn University in August 2007, where he studied geochronologic relationships of the southernmost Piedmont of Alabama and Georgia under the guidance and direction of Dr.
    [Show full text]
  • Geophysical Study of Gold Mineralized Zones in the Carolina Terrane of South Carolina
    University of South Carolina Scholar Commons Theses and Dissertations Spring 2020 Geophysical Study of Gold Mineralized Zones in the Carolina Terrane of South Carolina Saad Saud Alarifi Follow this and additional works at: https://scholarcommons.sc.edu/etd Part of the Geological Engineering Commons Recommended Citation Alarifi, S. S.(2020). Geophysical Study of Gold Mineralized Zones in the Carolina Terrane of South Carolina. (Doctoral dissertation). Retrieved from https://scholarcommons.sc.edu/etd/5928 This Open Access Dissertation is brought to you by Scholar Commons. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of Scholar Commons. For more information, please contact [email protected]. GEOPHYSICAL STUDY OF GOLD MINERALIZED ZONES IN THE CAROLINA TERRANE OF SOUTH CAROLINA by Saad Saud Alarifi Bachelor of Science King Saud University, 2010 Master of Science University of South Carolina, 2017 Submitted in Partial Fulfillment of the Requirements For the Degree of Doctor of Philosophy in Geological Sciences College of Arts and Sciences University of South Carolina 2020 Accepted by: James N. Kellogg, Major Professor Gene M. Yogodzinski, Committee Member Scott M. White, Committee Member Elkhedr H. Ibrahim, Committee Member Cheryl L. Addy, Vice Provost and Dean of the Graduate School © Copyright by Saad Saud Alarifi, 2020 All Rights Reserved. ii DEDICATION Thanks to almighty God who has given me strength throughout my life to complete this thesis. This work is dedicated to my wife. Without her unwavering love and support and unyielding patience and understanding this work would have never been completed. I would also like to dedicate this to my child and parents, for their love and support throughout my life.
    [Show full text]
  • Extending Full-Plate Tectonic Models Into Deep Time: Linking the Neoproterozoic and the Phanerozoic
    Extending Full-Plate Tectonic Models into Deep Time: Linking the Neoproterozoic and the Phanerozoic Andrew S. Merdith1,*, Simon E. Williams2, Alan S. Collins3, Michael G. Tetley1, Jacob A. Mulder4, Morgan L. Blades3, Alexander Young5, Sheree E. Armistead6, John Cannon7, Sabin 7 7 Zahirovic and R. Dietmar Müller 1 UnivLyon, Université Lyon 1, Ens de Lyon, CNRS, UMR 5276 LGL-TPE, F-69622, Villeurbanne, France 2 Northwest University, Xi’an, China 3 Tectonics and Earth Systems (TES) Group, Departtment of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia 4 School of Earth, Atmosphere and Environment, Monash University, Clayton, Victoria 3168, Australia 5 GeoQuEST Research Centre, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Northfields Avenue, NSW 2522, Australia 6 Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario, Canada & Metal Earth, Harquail School of Earth Sciences, Laurentian University, Sudbury, Ontario, Canada 7 Earthbyte Group, School of Geosciences, University of Sydney, Sydney, New South Wales, 2006, Australia [email protected] @AndrewMerdith [email protected] [email protected] @geoAlanC [email protected] @mikegtet [email protected] [email protected] [email protected] [email protected] @geoSheree [email protected] [email protected] @tectonicSZ [email protected] @MullerDietmar This is the unformatted accepted manuscript published in Earth-Science Reviews https://www.journals.elsevier.com/earth-science-reviews DOI: https://doi.org/10.1016/j.earscirev.2020.103477 1 Extending Full-Plate Tectonic Models into Deep Time: Linking the Neoproterozoic and the 2 Phanerozoic 3 4 Andrew S.
    [Show full text]