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Rb-Sr ISOCHRON FOR OLDER GNEISSES OF THE TAFJORD AREA, BASAL GNEISS REGION, SOUTHWESTERN NORWAY

Hannes K. Brueckner, Russell L. Wheeler, R. L. Armstrong

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Abstract

INTRODUCTION BRUECKNER, H. K., WHEELER, R. L. & ARMSTRONG, R. L.: Rb-Sr isochron for older gneisses of the Tafjord area, basal gneiss region, southwestern Norway. Norsk Geologisk Tidsskrift, 48, pp. 127131, Oslo 1968. The older gneisses of the Tafjord area in the basal gneiss region of southwestern Norway yield a Rb-Sr whole-rock isochron age of 1.00 (±0.15)xl09 years and a K-Ar biotite age of 383 (±12)x1()8 years. These ages are consistent with the geologic interpretation that the older gneisses are Precambrian rocks, recrystallized during Caledonian orogeny.

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INTRODUCTION BRUECKNER, H. K., WHEELER, R. L. & ARMSTRONG, R. L.: Rb-Sr isochron for older gneisses of the Tafjord area, basal gneiss region, southwestern Norway. Norsk Geologisk Tidsskrift, 48, pp. 127131, Oslo 1968. The older gneisses of the Tafjord area in the basal gneiss region of southwestern Norway yield a Rb-Sr whole-rock isochron age of 1.00 (±0.15)xl09 years and a K-Ar biotite age of 383 (±12)x1()8 years. These ages are consistent with the geologic interpretation that the older gneisses are Precambrian rocks, recrystallized during Caledonian orogeny.

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Available abstract

INTRODUCTION BRUECKNER, H. K., WHEELER, R. L. & ARMSTRONG, R. L.: Rb-Sr isochron for older gneisses of the Tafjord area, basal gneiss region, southwestern Norway. Norsk Geologisk Tidsskrift, 48, pp. 127131, Oslo 1968. The older gneisses of the Tafjord area in the basal gneiss region of southwestern Norway yield a Rb-Sr whole-rock isochron age of 1.00 (±0.15)xl09 years and a K-Ar biotite age of 383 (±12)x1()8 years. These ages are consistent with the geologic interpretation that the older gneisses are Precambrian rocks, recrystallized during Caledonian orogeny.

Key concepts: Isochron, Gneiss, Geology, Geochemistry, Precambrian, Orogeny, Metamorphic rock, Paleontology

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Rb-Sr ISOCHRON FOR OLDER GNEISSES OF THE TAFJORD AREA, BASAL GNEISS REGION, SOUTHWESTERN NORWAY — Research Paper | ScholarLens