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Record #144211:

U-Pb zircon age of a dolerite dyke from near Hamningberg, Varanger Peninsula, North Norway, and its regional significance / David Roberts, Nicholas Walker.

Title: U-Pb zircon age of a dolerite dyke from near Hamningberg, Varanger Peninsula, North Norway, and its regional significance / David Roberts, Nicholas Walker.
Author(s): Roberts, David.
Walker, Nicholas.
Date: 1997.
In: Norges Geologiske Undersøkelse. Bulletin. (1997.), Vol. 432 (1997)
Abstract: Dolerite dyke cutting very low-grade metasedimentary rocks of Løkvikfjellet Group has yielded U-Pb zircon intercept age of 567 Ma. Others of comparable character were given Late Devonian/Early Carboniferous K-Ar whole-rock ages. K-Ar dates are considered to reflect thermal resetting. Late Devonian thermal overprint has affected comparable dykes on nearby Rybachi Peninsula. It is suggested that many dykes in swarms around Varanger Peninsula may also be Vendian to Cambrian, later affected by Caledonian deformation.
Notes:

Norges Geologiske Undersøkelse. Bulletin. Vol. 432 :95-102 (1997).

Keywords: 551.222 -- Veins, dykes and sills.
551.72 -- Proterozoic.
551.732 -- Cambrian.
B -- Geology and soil sciences.
(*3) -- Arctic regions.
(*582) -- Finnmark.
SPRI record no.: 144211

MARCXML

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100 1# ‡aRoberts, David.
245 10 ‡aU-Pb zircon age of a dolerite dyke from near Hamningberg, Varanger Peninsula, North Norway, and its regional significance /‡cDavid Roberts, Nicholas Walker.
260 ## ‡a[S.l.] :‡b[s.n.],‡c1997.
300 ## ‡ap. 95-102 :‡bill., diag., table, map.
500 ## ‡aNorges Geologiske Undersøkelse. Bulletin. Vol. 432 :95-102 (1997).
520 3# ‡aDolerite dyke cutting very low-grade metasedimentary rocks of Løkvikfjellet Group has yielded U-Pb zircon intercept age of 567 Ma. Others of comparable character were given Late Devonian/Early Carboniferous K-Ar whole-rock ages. K-Ar dates are considered to reflect thermal resetting. Late Devonian thermal overprint has affected comparable dykes on nearby Rybachi Peninsula. It is suggested that many dykes in swarms around Varanger Peninsula may also be Vendian to Cambrian, later affected by Caledonian deformation.
650 07 ‡a551.222 -- Veins, dykes and sills.‡2udc
650 07 ‡a551.72 -- Proterozoic.‡2udc
650 07 ‡a551.732 -- Cambrian.‡2udc
650 07 ‡aB -- Geology and soil sciences.‡2local
651 #7 ‡a(*3) -- Arctic regions.‡2udc
651 #7 ‡a(*582) -- Finnmark.‡2udc
700 1# ‡aWalker, Nicholas.
773 0# ‡7nnas ‡tNorges Geologiske Undersøkelse. Bulletin. ‡gVol. 432 (1997) ‡wSPRI-62445
917 ## ‡aUnenhanced record from Muscat, imported 2019
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