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Earth Planets Space, Vol. 60 (No. 5), pp. 497-503, 2008

Geohazard assessment from satellite magnetic data modeling—with examples from the Arctic Margin along the Canada Basin and the Korean Peninsula along 40°N (latitude) parallel

Patrick T. Taylor1, Hyung Rae Kim2, Jan Kutina3, and G. Leonard Johnson4

1Planetary Geodynamics Branch, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, U.S.A.
2GEST/UMBC and Planetary Geodynamics Branch, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, U.S.A.
3Laboratory of Global Tectonics and Metallogeny, Department of Chemistry, American University, Washington D.C. 20016-8041, U.S.A.
4University of Alaska, Fairbanks (retired), Fairbanks, AK 99775, U.S.A.

(Received January 31, 2007; Revised July 24, 2007; Accepted November 13, 2007; Online published May 16, 2008)

Abstract: Long-wavelength, relative high-amplitude-magnetic anomalies obtained at satellite altitudes have provided an understanding of the nature of the deeper crust of the Earth. We have studied two such long-wavelength anomalies in regions of high stress—one with a large and one with a lower amplitude anomaly. The first feature is on the Canada Basin continental margin in the Northwest and Yukon Territories, Canada (magnetic anomaly range: 19 nT to -6 nT at 350-km altitude). This area is also the focus of significant stress and earthquake activity. We interpret this anomaly and associated tectonic activity with this region's position at or near the fulcrum of the scissors-like opening of the Canada Basin in the mid-Mesozoic Era. The second is a section along the 40°N (latitude) parallel crossing the Korean Peninsula (magnetic anomaly range: <-2 nT to >3 nT at 350-km altitude), where an east-west fracture zone has been proposed to extend from northeastern China, across the Korean Peninsula, Sea of Japan and (Northern) Japan.
Key words: Magnetic anomalies, Arctic Margin, Korean Peninsula, stress, tectonics.


Corresponding author E-mail: Patrick.Taylor@nasa.gov


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