Publisher： John Wiley & Sons Inc
E-ISSN： 2156-2202|87|B13|10918-10928
ISSN： 0148-0227
Source： Journal Of Geophysical Research, Vol.87, Iss.B13, 1982-12, pp. : 10918-10928
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Abstract
To study further the origin remanence in red beds, the volcanogenic Copper Harbor Conglomerate has been investigated using both paleomagnetic and petrographic techniques. Paleomagnetic results suggest the presence of two magnetic components, both possessing a westerly and shallow or normal Keweenawan direction. One component (in the vicinity of declination 294°, inclination −7.6) comprises approximately 30% of the total natural remanent magnetization, is removed by alternating field demagnetization following chemical demagnetization, and shows a consistent inclination error that is controlled in sense and amount by the dip of the cross beds in which the samples were taken. The low coercivities of this component suggest that the magnetization resides in magnetite. This and the inclination error due to the bedding indicate that the component is a detrital remanent magnetization.
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