TY - JOUR
T1 - Interpretation of gravity profiles across the northern Oaxaca terrane, its boundaries and the Tehuacán Valley, southern Mexico
AU - Campos-Enríquez, J. O.
AU - Alatorre-Zamora, M. A.
AU - Keppie, J. D.
AU - Belmonte-Jiménez, S. I.
AU - Ramón-Márquez, V. M.
N1 - Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - A gravity study was conducted across the northern Oaxaca terrane and its bounding faults: the Caltepec and Oaxaca Faults to the west and east, respectively. These faults juxtapose the Oaxaca terrane against the Mixteca and Juarez terranes, respectively. The Oaxaca Fault also forms the eastern boundary of the Cenozoic Tehuacán depression. On the west, at depth, the Tehuacán valley is limited by the normal buried Tehuacán Fault. This gravity study reveals that the Oaxaca Fault system gives rise to a series of east tilted basamental blocks (Oaxaca Complex). The tectonic depression is filled with Phanerozoic rocks and has a deeper depocenter to the west. The gravity data also indicate that on the west, the Oaxaca Complex, the Caltepec and Santa Lucia faults continue northwestwards beneath Phanerozoic rocks. A major E-W to NE-SW discontinuity is inferred to exist between profiles 1 and 2.
AB - A gravity study was conducted across the northern Oaxaca terrane and its bounding faults: the Caltepec and Oaxaca Faults to the west and east, respectively. These faults juxtapose the Oaxaca terrane against the Mixteca and Juarez terranes, respectively. The Oaxaca Fault also forms the eastern boundary of the Cenozoic Tehuacán depression. On the west, at depth, the Tehuacán valley is limited by the normal buried Tehuacán Fault. This gravity study reveals that the Oaxaca Fault system gives rise to a series of east tilted basamental blocks (Oaxaca Complex). The tectonic depression is filled with Phanerozoic rocks and has a deeper depocenter to the west. The gravity data also indicate that on the west, the Oaxaca Complex, the Caltepec and Santa Lucia faults continue northwestwards beneath Phanerozoic rocks. A major E-W to NE-SW discontinuity is inferred to exist between profiles 1 and 2.
KW - Bounding faults
KW - Caltepec Fault
KW - Gravity survey
KW - Northern Oaxaca terrane
KW - Oaxaca Fault
KW - Shallow crustal structure
KW - Structure
KW - Tectonics
KW - Tectono-terranes
KW - Tehuacan half-graben
UR - http://www.scopus.com/inward/record.url?scp=84921911977&partnerID=8YFLogxK
U2 - 10.1016/j.jsames.2014.09.020
DO - 10.1016/j.jsames.2014.09.020
M3 - Artículo
SN - 0895-9811
VL - 56
SP - 396
EP - 408
JO - Journal of South American Earth Sciences
JF - Journal of South American Earth Sciences
ER -