A Paleomagnetic Reconnaissance of some late Precambrian to Early Paleozoic Rocks of Tansen Area, Lesser Himalaya, Nepal
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概要
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For a preliminary paleomagnetic research on Late Precambrian to Early Paleozoic rocks in the Tansen area (West Central Nepal) carbonate, sandstone, quartzite and slate were collected from 30 sites at 4 localities. Detailed analyses of magnetic remanence were made using alternating field and thermal demagnetization techniques. Most of the specimens were found to be weakly magnetized (intensities of 10^-7 emu/cc, in order). Three magnetic components have been distinguished: (1) a predominant secondary component of recent origin, which represents a larger portion of the magnetization intensity in weakly magnetized specimens and thus hinders the separation of primary components. (2) another component (probably secondary), which yields a mean direction: D=320°, I=10°, a95=21° (before bedding correction) restricted only to purple slate varieties of Ramdighat Formation, and (3) a probably characteristic mean direction: D=350°, I=-45°, a95=15° derived from carbonate rock specimens of Kerabari Formation. This direction gives a virtual geomagnetic south pole position at 36°S/95°E.
- 北海道大学 = Hokkaido Universityの論文
著者
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Gautam Pitambar
北海道大学理学部地質学鉱物学教室
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Gautam P
Hokkaido Univ. Sapporo Jpn
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Gautam Pitambar
Coe For Neo-science Of Natural History Graduate School Of Science Hokkaido University
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Gautam Pitambar
Hokkaido Univ.
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Gautam Pitambar
Division Of Earth And Planetary Sciences Graduate School Of Science Hokkaido University
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