Mathematics – Logic
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994e%26psl.121..629s&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 121, no. 3/4, p. 629-638
Mathematics
Logic
13
Cenozoic Era, Indonesia, Paleomagnetism, Tectonics, Basalt, Core Sampling, Geological Faults, Plates (Tectonics), Rotation, Satellite Imagery, Sedimentary Rocks
Scientific paper
Extensive paleomagnetic sampling (34 sites) was carried out in Cenozoic formations of the North Arm of Sulawesi (between 120 and 124 deg E). Consistent results obtained between 120 and 122 deg E suggest the existence of a unique post-Miocene clockwise rotation of about 20-25 deg of the western part of the North Arm. This rotation probably occurred during the northward drift of the North Arm along the Palu-Matano sinistral transcurrent fault. Between 122.5 and 124 deg E, both clockwise and counterclockwise rotations with various amplitudes (from +/- 6 to 85 deg) are encountered, and these very likely correspond to individual microblock rotations due to pervasive deformation along shear zones. This result is consistent with the complex fault system of the Gorontalo and Kotamobagu shear zones that have been recognized on radar imagery and by SPOT image analyses.
Bellon H.
Kissel Catherine
Laj Carlo
Priadi B.
Rangin Claude
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