Magnetic properties of oceanic basalt samples

Online Access: Get full text
doi: 10.2973/dsdp.proc.28.129.1975
Author(s): Lowrie, W.; Hayes, D. E.
Author Affiliation(s): Primary:
Lamont-Doherty Geol. Obs., Palisades, N. Y., United States
Volume Title: Initial Reports of the Deep Sea Drilling Project
Source: Initial Reports of the Deep Sea Drilling Project, Vol.28, p.869-878. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0080-8334 CODEN: IDSDA6
Note: In English. Lamont-Doherty Sci. Contr. No. 2115; illus. incl. tables, sketch map
Summary: Stable remanent magnetic properties were measured in oceanic basalts from Sites 265, 266, and 267. Remanent intensities are unusually low at these sites, and at one site the mean remanent inclination is somewhat different from its expected value. Thermomagnetic analysis indicates that the magnetic minerals in the basalts are titanomaghemites, probably formed by low-temperature oxidation of original titanomagnetite. Basalt from Site 274 has a large unstable remanent component and shows a strong tendency to acquire viscous remanence. Measured remanent intensities, inclinations, and polarities of the basalt samples are compared with those values inferred from magnetic lineation model studies. The inclinations inferred from the measured mean remanences at Sites 266, 267, and 274 are consistent with the proposal of a nearly fixed, high-latitude position of the Antarctic plate from 40 m.y.B.P. to the present. (Auth.)
Year of Publication: 1975
Research Program: DSDP Deep Sea Drilling Project
Key Words: 07 Marine Geology and Oceanography; Antarctic Ocean; Antarctica; Basalts; Cenozoic; Continental shelf; DSDP Site 265; DSDP Site 266; DSDP Site 274; Deep Sea Drilling Project; Experimental studies; Ferromagnetic minerals; Igneous rocks; Indian Ocean; Leg 28; Magnetic properties; Magnetization; Marine geology; Mid-Indian Ridge; Minerals; Natural remanent magnetization; Paleomagnetism; Pole positions; Remanent magnetization; Reversals; Ross Sea; Southeast Indian Ridge; Southern Ocean; Stratigraphy; Tertiary; Thermoremanent magnetization; Viscous remanent magnetization; Volcanic rocks
Coordinates: S533227 S533227 E1095645 E1095644
S562408 S562407 E1100643 E1100641
S685949 S685949 E1732538 E1732538
Record ID: 1976003224
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States