| _version_ | 1867171777172471808 |
|---|---|
| author | Spaeth, Gerhard Schüll, P |
| author_facet | Spaeth, Gerhard Schüll, P |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | In western Neuschwabenland basic dikes occur in the Jurassic lavas and Permian sediments of Vestfjella as weil as in the Precambrian sedimentary-volcanogenic rock sequence of the Ahlmannryggen and in the Precambrian crystalline complexes of Heimefrontfjella and Mannefallknausane. The concentration of the dikes in Vestfjella is conspicuous. Two main directions of strike perpendicular to each other are recognizable, from which the NE-SW striking one is predominant. The direction of the dikes coincides with the Mesozoic and younger fracture tectonics. Age relationships by structural, petrographical and geochemical observations are confirmed by palaeomagnetic and radiometrie age determinations from PETERS et al. (1986). Considerations on the geochemistry of further dolerite occurrences from Antarctica and other regions of the Gondwana continent are pointed out. Finally comparisons with the analogous South African dike system show the geotectonic significance of the dolerite dikes for the break-up of Gondwana. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_761606 |
| institution | PANGAEA |
| language | en |
| publishDate | 1987 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Tab. 2: Average geochemical composition of dolerites from Neuschwabenland Spaeth, Gerhard Schüll, P -; Ahlmannryggen; Ahlmannryggen, Neuschwabenland, Antarctica; Aluminium oxide; Barium; Calcium oxide; Calculated; Chromium; Cobalt; Event label; Heimefrontfjella; Heimefrontfjella, Antarctica; Iron oxide, Fe2O3; Loss on ignition; Magnesium oxide; Manganese oxide; Nickel; Phosphorus pentoxide; Potassium/Barium ratio; Potassium/Rubidium ratio; Potassium oxide; Rubidium; Silicon dioxide; Sodium oxide; Strontium; Titanium dioxide; Vanadium; Vestfjella; Vestfjella, Kraul Mountains, Neuschwabenland, Antarctica; X-ray fluorescence (XRF); Yttrium; Zinc; Zirconium In western Neuschwabenland basic dikes occur in the Jurassic lavas and Permian sediments of Vestfjella as weil as in the Precambrian sedimentary-volcanogenic rock sequence of the Ahlmannryggen and in the Precambrian crystalline complexes of Heimefrontfjella and Mannefallknausane. The concentration of the dikes in Vestfjella is conspicuous. Two main directions of strike perpendicular to each other are recognizable, from which the NE-SW striking one is predominant. The direction of the dikes coincides with the Mesozoic and younger fracture tectonics. Age relationships by structural, petrographical and geochemical observations are confirmed by palaeomagnetic and radiometrie age determinations from PETERS et al. (1986). Considerations on the geochemistry of further dolerite occurrences from Antarctica and other regions of the Gondwana continent are pointed out. Finally comparisons with the analogous South African dike system show the geotectonic significance of the dolerite dikes for the break-up of Gondwana. |
| title | Tab. 2: Average geochemical composition of dolerites from Neuschwabenland |
| topic | -; Ahlmannryggen; Ahlmannryggen, Neuschwabenland, Antarctica; Aluminium oxide; Barium; Calcium oxide; Calculated; Chromium; Cobalt; Event label; Heimefrontfjella; Heimefrontfjella, Antarctica; Iron oxide, Fe2O3; Loss on ignition; Magnesium oxide; Manganese oxide; Nickel; Phosphorus pentoxide; Potassium/Barium ratio; Potassium/Rubidium ratio; Potassium oxide; Rubidium; Silicon dioxide; Sodium oxide; Strontium; Titanium dioxide; Vanadium; Vestfjella; Vestfjella, Kraul Mountains, Neuschwabenland, Antarctica; X-ray fluorescence (XRF); Yttrium; Zinc; Zirconium |
| url | https://doi.org/10.1594/PANGAEA.761606 |