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Record #120100:
- #120100
Main publication details
MARC recordEarly Caledonian high-grade metamorphism within exotic terranes of the Troms Caledonides? / Mona Lindstrøm, Arild Andresen.
| Title: | Early Caledonian high-grade metamorphism within exotic terranes of the Troms Caledonides? / Mona Lindstrøm, Arild Andresen. |
| Author(s): | Lindstrøm, Mona. Andresen, Arild. |
| Date: | 1992. |
| In: | Norsk Geologisk Tidsskrift. (1992.), Vol. 72 (1992) |
| Abstract: | Tectonic megalens, part of Nordmannvik Nappe of Upper Allochthon, is at Takvatnet in Troms. Nappe unit is dominated by upper amphibolite- to granulite- facies gneisses. A Rb-Sr whole-rock dating of a metadiorite within this unit gives an isochron age of 492±5 Ma with an initial Sr-isotropic ratio of 0.70814±0.00008. Isochron age is interpreted as high-grade metamorphic event associated with complete resetting of isotope system. Obtained age thus represents evidence of a pre-Scandian metamorphic event for at least one of high-grade units within Upper Allochthon in Troms Caledonides. |
| Notes: | Norsk Geologisk Tidsskrift. Vol. 72 :375-379 (1992). |
| Keywords: | 551.1/.4 -- Geology. 550.93 -- Geochronology. 539.16 -- Radio-carbon dating. B -- Geology and soil sciences. (*58) -- Norway. (*584) -- Troms. |
| SPRI record no.: | 120100 |
LDR 01456naa#a2200000#a#4500 001 SPRI-120100 005 20240418230627.0 007 ta 008 240418s1992####xx#ab#|##|###|0||#0|eng#d 035 ## ‡aSPRI-120100 040 ## ‡aUkCU-P‡beng‡eaacr 100 1# ‡aLindstrøm, Mona. 245 10 ‡aEarly Caledonian high-grade metamorphism within exotic terranes of the Troms Caledonides? /‡cMona Lindstrøm, Arild Andresen. 260 ## ‡a[S.l.] :‡b[s.n.],‡c1992. 300 ## ‡ap. 375-379 :‡bdiag., maps. 500 ## ‡aNorsk Geologisk Tidsskrift. Vol. 72 :375-379 (1992). 520 3# ‡aTectonic megalens, part of Nordmannvik Nappe of Upper Allochthon, is at Takvatnet in Troms. Nappe unit is dominated by upper amphibolite- to granulite- facies gneisses. A Rb-Sr whole-rock dating of a metadiorite within this unit gives an isochron age of 492±5 Ma with an initial Sr-isotropic ratio of 0.70814±0.00008. Isochron age is interpreted as high-grade metamorphic event associated with complete resetting of isotope system. Obtained age thus represents evidence of a pre-Scandian metamorphic event for at least one of high-grade units within Upper Allochthon in Troms Caledonides. 650 07 ‡a551.1/.4 -- Geology.‡2udc 650 07 ‡a550.93 -- Geochronology.‡2udc 650 07 ‡a539.16 -- Radio-carbon dating.‡2udc 650 07 ‡aB -- Geology and soil sciences.‡2local 651 #7 ‡a(*58) -- Norway.‡2udc 651 #7 ‡a(*584) -- Troms.‡2udc 700 1# ‡aAndresen, Arild. 773 0# ‡7nnas ‡tNorsk Geologisk Tidsskrift. ‡gVol. 72 (1992) ‡wSPRI-16075 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20240418