Paleomagnetic properties of basalts of ODP Hole 111-504B (Table 3)

DOI

Downhole magnetic field measurements were conducted in Hole 504B on the Costa Rica Ridge during ODP Leg 111. Three magnetic groups within oceanic basement at this site are tentatively defined, based on the interval mean values of the downhole magnetic field. Statistical analyses show that there are significant differences in the inclinations of natural remanent magnetization (NRM) among the three magnetic groups. Although this could be caused by various factors, we explain the inclination difference among the three groups by simple tectonic displacements of basement by faulting after its formation, about 5.9 Ma ago. Based on the intensities of NRM and inclinations measured in the basement core samples drilled in Hole 504B on DSDP Legs 69, 70, and 83 and ODP Leg 111, the investigated section of basement formation can be divided into three or four magnetic zones that parallel the zones defined by the downhole magnetic field, alteration, and lithology. Downhole magnetic field and paleomagnetic data generally correlate positively, in spite of some discrepancies. The magnetic susceptibility values of the core samples were used to derive the insitu NRM from the downhole magnetic field data.

Supplement to: Kinoshita, Hajimu; Furuta, Toshio; Pariso, Janet E (1989): Downhole magnetic field measurements and paleomagnetism, Hole 504B, Costa Rica Ridge. In: Becker, K; Sakai, H; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 111, 147-156

Identifier
DOI https://doi.org/10.1594/PANGAEA.753006
Related Identifier https://doi.org/10.2973/odp.proc.sr.111.141.1989
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.753006
Provenance
Creator Kinoshita, Hajimu; Furuta, Toshio; Pariso, Janet E
Publisher PANGAEA
Publication Year 1989
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 305 data points
Discipline Earth System Research
Spatial Coverage (-83.730 LON, 1.227 LAT); North Pacific Ocean
Temporal Coverage Begin 1986-10-05T11:45:00Z
Temporal Coverage End 1986-10-16T18:15:00Z