Remanent and intrinsic properties of basalts at DSDP Leg 82 Holes, supplement to: Smith, Guy M; Banerjee, Subir K (1985): Magnetic properties of basalts from the Central North Atlantic Ocean. In: Bougault, H; Cande, SC; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 82, 369-375

• Main Authors: Smith, Guy M, Banerjee, Subir K
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1985
• Subjects: Deep Sea Drilling Project DSDP; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.805531; https://doi.pangaea.de/10.1594/PANGAEA.805531

The magnetic properties of 56 samples of basalt from DSDP Leg 82 were studied in order to examine regional variations as well as the general question of the origin or remanence. Magnetization was carried, for the most part, by typical low temperature oxidized titanomagnetites, although two samples did show anomalous thermomagnetic curves. The natural remanence is distinctly different from an anhysteretic remanent magnetization and is hypothesized (by inference) to also be different from a thermoremanent magnetization (TRM) also. This suggests that alteration not only reduces the initial TRM but also changes it to chemical remanent magnetization with a significantly different magnetic character. An examination of thermomagnetic data tentatively suggests that the ulvospinel content of the titanomagnetites may be more variable than is commonly assumed. With the exception of a slight increase in saturation magnetization with decreasing latitude, no significant regional variations were evident.