Magnetic minerals and magnetic properties of the Siwalik Group sediments of the Karnali river section in Nepal

Details Magnetic minerals and magnetic properties of the Siwalik Group sediments of the Karnali river section in Nepal Magnetic minerals and magnetic properties of the Siwalik Group sediments of the Karnali river section in Nepal

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ep%26s...52..337g&link_type=abstract

Earth, Planets and Space, Volume 52, p. 337-345.

Computer Science

4

Scientific paper

Sandstones and siltstones collected from the Siwalik molasse sequence (~16 to 5 Ma) of the Karnali river section have been studied for their magnetic properties. Behavior of the specimens during demagnetization (of the NRM and IRM) and magnetic susceptibility vs. temperature data suggest that goethite, maghemite/magnetite, and hematite are the main magnetic minerals in the section. Goethite, carrying a recent component, is the dominant magnetic mineral in the fine-grained lithologies from the lower part. Maghemite and magnetite, which also carry a secondary remanence, occur in the sandstones from the upper part. Hematite, mainly of detrital origin, is present in the whole sequence. The magnetic fabric is defined by mainly oblate AMS ellipsoids and a low degree of anisotropy (P´ < 1.20). The magnetic lineations (declinations: 75°-130° or 245°-310°; peak orientation: 290°/2.8°) are subparallel to the fold axes/bedding strikes/thrust fronts (WNW-ESE). The initial sedimentary-compactional fabric has been overprinted by a secondary tectonic fabric, which was probably induced by mild deformation active in the compressive tectonic setting.

Affiliated with

Also associated with

No associations

Rating

Magnetic minerals and magnetic properties of the Siwalik Group sediments of the Karnali river section in Nepal does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Magnetic minerals and magnetic properties of the Siwalik Group sediments of the Karnali river section in Nepal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic minerals and magnetic properties of the Siwalik Group sediments of the Karnali river section in Nepal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1128892