TY - JOUR
T1 - Tectonics of the Nazca-Antarctic plate boundary
AU - Anderson-Fontana, Sandra
AU - Engeln, Joseph F.
AU - Lundgren, Paul
AU - Larson, Roger L.
AU - Stein, Seth
N1 - Funding Information:
This research was supported by NSF grants OCE 8308894, EAR 8618038, and NASA Crustal Dynamics Contract NAS5-27238. Acknowledgment for partial support is also made to the donors of the Petroleum Research Fund, administered by the American Chemical Society. The plate motion inversion program used was written jointly by Richard Gordon and Seth Stein.
PY - 1987/11
Y1 - 1987/11
N2 - We have constructed a new bathymetric chart of part of the Chile transform system, based mainly on an R/V "Endeavor" survey from 100°W to its intersection with the East Ridge of the Juan Fernandez microplate at 34°30′S, 109°15′W. A generally continuous lineated trend can be followed through the entire region, with the transform valley being relatively narrow and well-defined from 109°W to approximately 104°30′W. The fracture zone then widens to the east, with at least two probable en echelon offsets to the south at 104° and 102°W. Six new strike-slip mechanisms along the Chile Transform and one normal fault mechanism near the northern end of the Chile Rise, inverted together with other plate motion data from the eastern portion of the boundary, produce a new best fit Euler pole for the Nazca-Antarctic plate pair, providing tighter constraints on the relative plate motions.
AB - We have constructed a new bathymetric chart of part of the Chile transform system, based mainly on an R/V "Endeavor" survey from 100°W to its intersection with the East Ridge of the Juan Fernandez microplate at 34°30′S, 109°15′W. A generally continuous lineated trend can be followed through the entire region, with the transform valley being relatively narrow and well-defined from 109°W to approximately 104°30′W. The fracture zone then widens to the east, with at least two probable en echelon offsets to the south at 104° and 102°W. Six new strike-slip mechanisms along the Chile Transform and one normal fault mechanism near the northern end of the Chile Rise, inverted together with other plate motion data from the eastern portion of the boundary, produce a new best fit Euler pole for the Nazca-Antarctic plate pair, providing tighter constraints on the relative plate motions.
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U2 - 10.1016/0012-821X(87)90187-7
DO - 10.1016/0012-821X(87)90187-7
M3 - Article
AN - SCOPUS:0023517466
SN - 0012-821X
VL - 86
SP - 46
EP - 56
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
IS - 1
ER -