Low-pressure metamorphism and anatexis of Carolina Slate Belt Phyllites in the contact aureole of the Lilesville Pluton, North Carolina, USA

1984 ◽  
Vol 87 (3) ◽  
pp. 297-309 ◽  
Author(s):  
Nicholas H. Evans ◽  
J. Alexander Speer
Keyword(s):  
North Carolina ◽  
Low Pressure ◽  
Contact Aureole ◽  
Carolina Slate Belt

scholarly journals The Russell Gold Deposit, Carolina Slate Belt, North Carolina

2007 ◽  
Vol 102 (2) ◽  
pp. 239-256 ◽  
Author(s):  
T. L. Klein ◽  
C. G. Cunningham ◽  
M.A.V. Logan ◽  
R. R. Seal
Keyword(s):  
North Carolina ◽  
Gold Deposit ◽  
Carolina Slate Belt

scholarly journals Trace fossils from the Late Proterozoic of North Carolina: early conquest of deep-sea bottoms

1992 ◽  
Vol 6 ◽  
pp. 265-265 ◽  
Author(s):  
Adolf Seilacher ◽  
Friedrich Pflüger
Keyword(s):  
North Carolina ◽  
Deep Sea ◽  
Tool Marks ◽  
Late Proterozoic ◽  
The North ◽  
Bedding Planes ◽  
Tool Mark ◽  
Carolina Slate Belt ◽  
Body Fossil ◽  
Complex Organic

The trace fossil Oldhamia reflects systematic strip mining of an infaunal, worm-like sediment feeder. It is known from many parts of the world in Cambrian complexes, whose flysch-like and accreted character suggests deposition on a deep continental slope. In similar rocks of the North Carolina Slate Belt. Oldhamia is associated with rare specimens of the Ediacara-type body fossil Pteridinium, as well as tool marks of a problematic stiff organism reminiscent of graptolite stipes (Vendospica).This occurrence (1) extends the stratigraphic range of Oldhamia into the Late Proterozoic. It also reminds us that, by that time, worm-like, endobenthic bilaterians (2) had become behaviorally specialized and (3) had colonized shelf and deep-sea bottoms well before the Cambrian evolutionary explosion. (4) Since bioturbators were small and did burrow strictly along bedding planes, their mixing effect was as yet negligible. (5) The new tool-mark fossils tell us that complex, organic-walled and perhaps colonial organisms were around in addition to sand-corals (Psammocorallia), possibly sponges and the probably plasmodial Vendobionta.

Graphite thermometry in a low-pressure contact aureole, Halifax, Nova Scotia

Lithos ◽  
2014 ◽  
Vol 208-209 ◽  
pp. 21-33 ◽  
Author(s):  
L.J. Hilchie ◽  
R.A. Jamieson
Keyword(s):  
Nova Scotia ◽  
Low Pressure ◽  
Contact Aureole

scholarly journals Employing contact metamorphism to assess the conditions of pluton emplacement and timing of recrystallization in southwestern Kellys Mountain, Cape Breton Island, Nova Scotia

2017 ◽  
Vol 54 (11) ◽  
pp. 1165-1178 ◽  
Author(s):  
Nabil A. Shawwa ◽  
Robert P. Raeside ◽  
David W.A. McMullin ◽  
Christopher R.M. McFarlane
Keyword(s):  
Nova Scotia ◽  
Regional Metamorphism ◽  
Low Pressure ◽  
Contact Metamorphism ◽  
Contact Aureole ◽  
Low Grade ◽  
Cape Breton Island ◽  
Metasedimentary Rocks ◽  
Cape Breton ◽  
George River

At Kellys Mountain, Cape Breton Island, Nova Scotia, the late Neoproterozoic Glen Tosh formation (a low-grade metapsammite–metapelite unit of the George River Metamorphic Suite) has been intruded by diorite, granodiorite, and granite plutons, and the diorite hosts a narrow contact metamorphic aureole. New mapping and sampling in the contact aureole reveals that the metasedimentary rocks have reached amphibolite-facies metamorphism resulting in the development of neoformed biotite, muscovite, cordierite, ilmenite, garnet, andalusite, sillimanite, monazite, and spinel within the meta-pelite, a mineral assemblage also found in the Kellys Mountain Gneiss as a result of low-pressure regional metamorphism. Neoformed minerals and the disappearance of foliation defines a contact metamorphic aureole within 300 m of the pluton contacts. Petrographic and microprobe analyses of equilibrium assemblages in metapelitic units of the contact aureole yielded metamorphic pressures of 250 MPa, implying an intrusion depth of ∼9 km, with temperatures ranging from 365 to 590 °C. The presence of earlier-formed andalusite and garnet indicates the rocks may have initially undergone a low-pressure regional metamorphic event prior to contact metamorphism. Monazite in the contact aureole was dated using in-situ U–Pb methods and yielded an age of 480.9 ± 3.7 Ma, interpreted as the time of formation of the contact metamorphic aureole.

Ediacarian fossils from the Carolina slate belt, Stanly County, North Carolina

Geology ◽  
1984 ◽  
Vol 12 (7) ◽  
pp. 387 ◽  
Author(s):  
Gail G. Gibson ◽  
Steven A. Teeter ◽  
M. A. Fedonkin
Keyword(s):  
North Carolina ◽  
Carolina Slate Belt
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