Geology, structural evolution (Eocene to recent) and seismic events in the Santiaguillo graben, Durango, Mexico
Por:
Nieto-Samaniego, AF, Barajas-Gea, CI, Gomez-Gonzalez, JM, Rojas, A, Alaniz-Alvarez, SA, Xu, SS
Publicada:
1 abr 2012
Categoría:
Geology
Resumen:
The Santiaguillo graben forms the northwestern part of the regional San Luis-Tepehunaes fault system, which is located between the Sierra Madre Occidental and the Mesa Central physiographic provinces. In the region of Santiaguillo graben we identified eight lithostratigraphic units with ages from Eocene to Quaternary. The lower part of the stratigraphic sequence is composed of porphyritic andesites, the middle is a sequence of ignimbrites, pyroclastic fall deposits and rhyoltic lavas, and the upper part are basaltic lavas, as well alluvial, lacustrine and eolian sediments. The Santiaguillo graben consists of four areas with different structural characteristics: a zone with normal faults in asymmetrical array forming a half-graben located in the southeastern part of the study area; a zone with normal faults forming a horst and graben system located in the northwestern part of the study area; and two relay zones in the central part, a left-relay and a right-relay. The graben developed be
Filiaciones:
Nieto-Samaniego, AF:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Juriquilla 76230, Queretaro, Mexico
Barajas-Gea, CI:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Juriquilla 76230, Queretaro, Mexico
Gomez-Gonzalez, JM:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Juriquilla 76230, Queretaro, Mexico
Alaniz-Alvarez, SA:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Juriquilla 76230, Queretaro, Mexico
Xu, SS:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Juriquilla 76230, Queretaro, Mexico
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