Delineating the northern part of the Socotra Basin, offshore Korea, using marine magnetics

The geologic boundary between the northern part of the Socotra Basin and the Fukien-Reinan Massif, offshore Korea: Implementations in marine magnetics

“…1). This region is poorly understood because of the very few geophysical studies (Emery et al, 1969;Wageman et al, 1970;Zhou et al, 1989;Suh et al, 2005) applied to it since 1970. Some other domestic reports (Lee et al, 1985;Kim et al, 1985) were published on the same region and its vicinity.…”

“…Discussing the earlier and latest works of Emery et al (1969), Wageman et al (1970), Zhou et al (1989), and Suh et al (2005) will be the key point to selecting the adequate interpretation techniques in delineating the location of the SB-FRMB. It is worth noting that at earlier times, the Socotra Basin was named the Socotra rocks (Frazier et al, 1976).…”

“…One main problem is associated with the sparse lines based survey: the random distribution of the sparse geophysical lines means, consequently, that the geologic boundary with long aerial extension cannot be delineated unequivocally. Suh et al (2005) have overcome this problem by conducting a closely spaced magnetic survey, but they have not use the appropriate interpretation methods to delineate better the SB-FRMB. Inadequacy of these methods (i.e.…”

“…power spectrum and analytic signal) to delineate the SB-FRMB comes mainly from being used for depth estimation and not for the boundary detection. The location of the SB-FRMB by Suh et al (2005) was suggested as a result of the variation in the depth estimates of two automated methods.…”

“…A recent local study based on a closely spaced marine magnetic survey 5 km apart (Suh et al, 2005) placed the boundary in the northwestern part of our study area (Fig. 2d) based on the analysis of magnetic intensity and basement depth estimation methods.…”