Magnetic components contributing to the NRM of Middle Siwalik red beds

Details Magnetic components contributing to the NRM of Middle Siwalik red beds Magnetic components contributing to the NRM of Middle Siwalik red beds

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980e%26psl..47..279t&link_type=abstract

Earth and Planetary Science Letters, Volume 47, Issue 2, p. 279-284.

Computer Science

13

Scientific paper

The components of the NRM in Middle Siwalik red beds are carried by two phases of hematite, a red pigment phase and a specular hematite phase. We present evidence in the form of a conglomerate test that the specularite phase carries a remanence acquired during or shortly after deposition. The red pigment, however, post-dates deposition, in many cases by at least one reversal boundary. This secondary component has a higher coercivity but a lower blocking temperature in these rocks and can therefore be selectively removed by thermal demagnetization to reveal a primary magnetization useful for magnetostratigraphic studies.

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