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Title: Tertiary tectonic in the Tehuantepec Isthmus, Mexico

Abstract

A microplate model in the basement was proposed according to photointerpretation of satellite imagery and supported with microtectonic studies in the Tehuantepec's Isthmus. The microplate is located in the northwestern part of the [open quotes]Sierra de Chiapas,[close quotes] and structurally has lineaments that correspond with sinestral wrench faults oriented northeast-southwest and dextral faults oriented northwest-southeast. In the front of the microplate, these faults are joined in an arc form. The microplate began its movement forward to the north in the middle Tertiary. This movement originated in a regional compressional stress that was younger to the north. The stress changed the orientation of the anticline axis from northwest-southeast to west-east. In its western limit, the stress produces a sinestral shear stress that built a rotational deformation in the [open quotes]Sierra Atravesada,[close quotes] and represents a superimposed tectonic block over an ancient (laramide) orogeny. This system has also produced other secondary transtensional effects oriented northwest-southeast, represented along the [open quotes]Depression Central del Istmo.[close quotes] The microplate has formed a tensional system opening the [open quotes]Superior, Inferior, and Mar Muerto[close quotes] lagoons. The microplate is strongly related with the relief, seismic activity, and the tectonics of the salt of the Tehuantepec's Isthmus.

Authors:
Publication Date:
OSTI Identifier:
6102650
Alternate Identifier(s):
OSTI ID: 6102650
Report Number(s):
CONF-930306--
Journal ID: ISSN 0149-1423; CODEN: AABUD2
Resource Type:
Conference
Journal Name:
AAPG Bulletin (American Association of Petroleum Geologists); (United States)
Additional Journal Information:
Journal Volume: 77:2; Conference: International congress of the American Association of Petroleum Geologists (AAPG), Caracas (Venezuela), 14-17 Mar 1993; Journal ID: ISSN 0149-1423
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 58 GEOSCIENCES; GEOLOGIC FAULTS; ORIENTATION; GEOLOGIC STRUCTURES; DEFORMATION; MEXICO; PLATE TECTONICS; BASEMENT ROCK; LINEAMENTS; SEISMIC EVENTS; SHEAR; STRESSES; TECTONICS; TOPOGRAPHY; DEVELOPING COUNTRIES; GEOLOGIC FRACTURES; LATIN AMERICA; NORTH AMERICA 020200* -- Petroleum-- Reserves, Geology, & Exploration; 580000 -- Geosciences

Citation Formats

Lopez, F.A.. Tertiary tectonic in the Tehuantepec Isthmus, Mexico. United States: N. p., 1993. Web.
Lopez, F.A.. Tertiary tectonic in the Tehuantepec Isthmus, Mexico. United States.
Lopez, F.A.. Mon . "Tertiary tectonic in the Tehuantepec Isthmus, Mexico". United States.
@article{osti_6102650,
title = {Tertiary tectonic in the Tehuantepec Isthmus, Mexico},
author = {Lopez, F.A.},
abstractNote = {A microplate model in the basement was proposed according to photointerpretation of satellite imagery and supported with microtectonic studies in the Tehuantepec's Isthmus. The microplate is located in the northwestern part of the [open quotes]Sierra de Chiapas,[close quotes] and structurally has lineaments that correspond with sinestral wrench faults oriented northeast-southwest and dextral faults oriented northwest-southeast. In the front of the microplate, these faults are joined in an arc form. The microplate began its movement forward to the north in the middle Tertiary. This movement originated in a regional compressional stress that was younger to the north. The stress changed the orientation of the anticline axis from northwest-southeast to west-east. In its western limit, the stress produces a sinestral shear stress that built a rotational deformation in the [open quotes]Sierra Atravesada,[close quotes] and represents a superimposed tectonic block over an ancient (laramide) orogeny. This system has also produced other secondary transtensional effects oriented northwest-southeast, represented along the [open quotes]Depression Central del Istmo.[close quotes] The microplate has formed a tensional system opening the [open quotes]Superior, Inferior, and Mar Muerto[close quotes] lagoons. The microplate is strongly related with the relief, seismic activity, and the tectonics of the salt of the Tehuantepec's Isthmus.},
doi = {},
journal = {AAPG Bulletin (American Association of Petroleum Geologists); (United States)},
issn = {0149-1423},
number = ,
volume = 77:2,
place = {United States},
year = {1993},
month = {2}
}

Conference:
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