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- Note] TECTONIC SIGNIFICANCE OF THE LATE PROTEROZOIC ECONOMY RIVER GNEISS, COBEQUID HIGHLANDS, AVALON COMPOSITE TERRANE, NOVA-SCOTIA
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DocNo of ILP: 8277
Doc. Type: Note
Title: TECTONIC SIGNIFICANCE OF THE LATE PROTEROZOIC ECONOMY RIVER GNEISS, COBEQUID HIGHLANDS, AVALON COMPOSITE TERRANE, NOVA-SCOTIA
Authors: DOIG, R; MURPHY, JB; NANCE, RD
Full Name of Authors: DOIG, R; MURPHY, JB; NANCE, RD
Keywords by Author:
Keywords Plus: SOUTHERN BRITAIN; IGNEOUS ROCKS; AGES; EVOLUTION; SUPERCONTINENT; PALEOMAGNETISM; AR-40/AR-39; LAURENTIA; BRAZIL; MODEL
Abstract: A 734 +/- 2 Ma U - Pb (zircon) age for the Economy River orthogneiss, Coboquid Highlands, Nova Scotia, is interpreted as being representative of a regionally extensive ca. 820 - 660 Ma event that is recorded in many parts of the Late Proterozoic -Early Cambrian Avalon Composite Terrane and the Gondwanan margin. The geochemistry of the gneiss is consistent with an arc environment. Although the gneiss may represent part of the sialic basement to the terrane, field relationships indicate that some of the basement is significantly older. The date may provide a minimum age for the platformal sedimentary rocks (Gamble Brook Formation) that the orthogneiss intruded and thus help constrain the Late Proterozoic paleogeographic position of Avalon relative to Gondwanaland.
Cate of OECD: Earth and related environmental sciences
Year of Publication: 1993
Business Area: gamble
Detail Business: gamble
Country: Canada
Study Area: economy, economy, older
Name of Journal: CANADIAN JOURNAL OF EARTH SCIENCES
Language: English
Country of Authors: MCGILL UNIV, DEPT GEOL SCI, MONTREAL H3A 2A7, QUEBEC, CANADA; ST FRANCIS XAVIER UNIV, DEPT GEOL, ANTIGONISH B2G 1C0, NS, CANADA; OHIO UNIV, DEPT GEOL SCI, ATHENS, OH 45701 USA
Press Adress: DOIG, R (reprint author), UNIV QUEBEC, CTR RECH GEOCHIM ISOTOP & GEOCHRONOL, GEOTOP, POB 8888, STN A, MONTREAL H3C 3P8, QUEBEC, CANADA.
Email Address:
Citaion:
Funding:
Lists of Citation: BARR SM, 1989, GEOLOGY, V17, P822, DOI 10.1130/0091-7613(1989)017<0822:TSTICB>2.3.CO;2; BARR SM, 1989, 14TH ANN REV ACTIVIT, P182; BARR SM, 1988, MARITIME SEDIMENTS A, V24, P353; BEVIER ML, 1993, CAN J EARTH SCI, V30, P1, DOI 10.1139/e93-001; BEVIER ML, 1990, J GEOL, V98, P955; CABY R, 1989, CAN J EARTH SCI, V26, P1136, DOI 10.1139/e89-097; CURRIE KL, 1991, CAN J EARTH SCI, V27, P1418; DALLMEYER RD, 1990, ATLANTIC GEOL, V26, P247; DALZIEL IWD, 1991, GEOLOGY, V19, P598, DOI 10.1130/0091-7613(1991)019<0598:PMOLAE>2.3.CO;2; DAVIS DW, 1982, CAN J EARTH SCI, V19, P2141, DOI 10.1139/e82-188; DAVISON I, 1989, PRECAMBRIAN RES, V45, P319, DOI 10.1016/0301-9268(89)90068-5; DOIG R, 1991, CAN J EARTH SCI, V28, P504, DOI 10.1139/e91-044; DONOHOE HV, 1983, MINES MINERALS BRANC, P327; GAUDETTE HE, 1984, MINES MINERALS BRANC, P285; HOFFMAN PF, 1991, SCIENCE, V252, P1409, DOI 10.1126/science.252.5011.1409; HOFMANN HJ, 1974, CAN J EARTH SCI, V11, P1098, DOI 10.1139/e74-105; JOHNSON RJE, 1986, CAN J EARTH SCI, V23, P1673, DOI 10.1139/e86-155; Keppie J.D., 1990, GEOL SOC AM ABSTR, V22, P27; KEPPIE JD, 1991, W AFRICAN OROGENS CI, P315; KEPPIE JD, 1990, GEOL SOC AM BULL, V102, P516, DOI 10.1130/0016-7606(1990)102<0516:TIOAAH>2.3.CO;2; KROGH TE, 1988, CAN J EARTH SCI, V25, P442, DOI 10.1139/e88-045; KROGH TE, 1973, GEOCHIMICA COSMOCHIM, V37, P4895; MURPHY JB, 1991, GEOLOGY, V19, P469, DOI 10.1130/0091-7613(1991)019<0469:SMFTCC>2.3.CO;2; MURPHY JB, 1988, CURRENT RES B, P99; Nance R.D., 1990, GEOLOGICAL SOC LONDO, V51, P395, DOI 10.1144/GSL.SP.1990.051.01.26; OBRIEN SJ, 1989, GEOLOGICAL ASS CANAD, V14, pA10; OLSZEWSKI WJ, 1980, CAN J EARTH SCI, V17, P1407, DOI 10.1139/e80-148; PATCHETT PJ, 1980, J GEOL SOC LONDON, V137, P649, DOI 10.1144/gsjgs.137.5.0649; PEARCE JA, 1984, J PETROL, V25, P956; PEPIPER G, 1989, ATLANTIC GEOL, V25, P143; PEPIPER G, 1989, GEOL SOC AM BULL, V101, P364, DOI 10.1130/0016-7606(1989)101<0364:TUHJGC>2.3.CO;2; PIMENTEL MM, 1992, GEOLOGY, V20, P375, DOI 10.1130/0091-7613(1992)020<0375:NCAICB>2.3.CO;2; STACEY JS, 1975, EARTH PLANET SC LETT, V26, P207, DOI 10.1016/0012-821X(75)90088-6; SWINDEN S, 1991, GEOLOGICAL SURVEY CA, V902, P3; TUCKER RD, 1991, J GEOL SOC LONDON, V148, P435, DOI 10.1144/gsjgs.148.3.0435; VANDERVOO R, 1988, GEOL SOC AM BULL, V100, P311; Wardle R.J., 1978, THESIS U NEW BRUNSWI
Number of Citaion: 37
Publication: CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
City of Publication: OTTAWA
Address of Publication: 65 AURIGA DR, SUITE 203, OTTAWA, ON K2E 7W6, CANADA
ISSN: 0008-4077
29-Character Source Abbreviation: CAN J EARTH SCI
ISO Source Abbreviation: Can. J. Earth Sci.
Volume: 30
Version: 3
Start of File: 474
End of File: 479
DOI: 10.1139/e93-035
Number of Pages: 6
Web of Science Category: Geosciences, Multidisciplinary
Subject Category: Geology
Document Delivery Number: LM391
Unique Article Identifier: WOS:A1993LM39100006
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