A new occurrence of a calco-alkaline granite intrusion from the Frederikshaab District, South Greenland

Bondam, J

doi:10.34194/bullggu.v15.6548

bullggu

1956

DOI: 10.34194/bullggu.v15.6548

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A new occurrence of a calco-alkaline granite intrusion from the Frederikshaab District, South Greenland

J Bondam¹

Abstract: A newly discovered, fluorite-bearing, calco-alkaline granite intrusive from the Frederikshaab District, Southwest Greenland, is described. The granite is closely related to some rapakivi granites, pyterlite and wiborgitc, from the Viipuri area, Finland, as described by Wahl (1925). The relation between this intrusive and other "younger intrusives" is discussed, with respect to the fluorine content of the group of younger intrusives (Wegmann, 1938).

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1962

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On the geology of the country around ivigtut, SW-Greenland

Berthelsen

1962

Geol Rundsch

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ZusammenfassungNach intensiver Kartierungstiitigkeit w~ihrend der letzten Jahre in SW-GrSnland wird ein Versuch gemacht, die regionalgeologische Stellung des Kryolithvorkommens AbstractBased on recent survey work sponsored by the Geological Survey of Greenland, an attempt is made here to establish an appropriate background to the cryolite deposit at Ivigtut. The cryolite ore body occurs within the original top part of a stock of alkali granite which, during the younger time of the cratonic Gardar period, was emplaced into the older, folded basement rocks. Close to the granite stock a breccia pipe occurs. Both bodies were cut by tinguaitic dykes b e f o r e the actual "mise en place" of the cryolite body. The various events which contributed to such a set-up are discussed from both local and regional angles. Certain older basement structures, such as e.g. a Ketilidian depression zone, a younger, partial mobilisation of the dyke-cut Ketilidian crust, followed by the ascent of fluorite-bearing granites, may well have influenced the superimposed Gardar tectonics. During the Gardar period, a regional system of wrench faults was active --in interaction with Atlantic volcanism.

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On the geology of the country around ivigtut, SW-Greenland

Berthelsen

1962

Geol Rundsch

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A new occurrence of a calco-alkaline granite intrusion from the Frederikshaab District, South Greenland

Cited by 1 publication

References 0 publications

On the geology of the country around ivigtut, SW-Greenland

On the geology of the country around ivigtut, SW-Greenland

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