Open AccessPalaeomagnetic Results from Palaeozoic Rocks of South‐east Australia
Author(s) -
Luck G. R.
Publication year - 1973
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1973.tb06518.x
Subject(s) - paleozoic , geology , carboniferous , conglomerate , igneous rock , paleomagnetism , paleontology , demagnetizing field , permian , polar wander , magnetization , magnetic field , sedimentary rock , structural basin , physics , quantum mechanics
Summary Palaeomagnetic results have been obtained from igneous rocks whose ages range from Middle Silurian (Wenlockian) to Lower Carboniferous (Viséan). A collection of 210 samples from four areas of south‐east Australia was studied. The use of alternating field demagnetization procedures enabled the directions of presumed original magnetization to be isolated for the various formations. A conglomerate test provided additional stability evidence for the result from one formation. Calculated palaeomagnetic pole positions are as follows: Isismurra Formation and Lower Kuttung Series (Viséan)–34°E, 73°N with A 95 = 21°; Lochiel Formation (Upper Devonian)–140°E, 58°N with A 95 = 7°; Ainslie Volcanics (Lower Devonian)–173°E, 71°N with A 95 = 10°; Bowning Group (Gedinnian Stage, Lower Devonian)–225°E, 64°N with A 95 = 9°; Laidlaw Formation, Douro Volcanics and Hawkins 'Series’(Wenlockian‐Ludlovian, Middle‐Upper Silurian)–91°E, 54°N with A 95 = 7°.