Subsidence of the Laguna Salada Basin, northeastern Baja California, Mexico, inferred from Milankovitch climatic changes
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2005
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| _version_ | 1876488101569757184 |
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| author | Juan Contreras |
| author_facet | Juan Contreras |
| contents | Subsidence of the Laguna Salada Basin, northeastern Baja California, Mexico, inferred from Milankovitch climatic changes Juan Contreras Arturo Martín-Barajas Juan Carlos Herguera Ciencias de la Tierra Milankovitch cyclicity Gulf of California extensional province Laguna Salada in northern Baja California, Mexico, is an active half-graben product of the trans-tensional tectonics of theGulf of California. It is sensitive to changes in sediment supply from the Colorado River basin. We present a time series analysisof the upper 980 m of a gamma-ray log from a borehole drilled near the Laguna Salada fault. The power spectrum of the gammaraylog resembles the spectrum of δ18O Pleistocene isotopic variations from ice cores and from the deep ocean, known to bestrongly controlled by Milankovitch cycles. We correlate δ18O stages with silty and sandy intervals in the log. Downcore ages forthe last 780 ky are constrained within ~10 kyr. We derive a simple time vs. depth calibration relation for the basin over this timeinterval. Estimated sedimentation rates at the drill site appear to be constant with a value of ~1.6 mm/yr. We propose that thissubsidence rate is produced by the Laguna Salada fault. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844107 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.44 |
| format | Artículo científico |
| id | redalyc_56844107 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Subsidence of the Laguna Salada Basin, northeastern Baja California, Mexico, inferred from Milankovitch climatic changes Juan Contreras Ciencias de la Tierra Milankovitch cyclicity Gulf of California extensional province Subsidence of the Laguna Salada Basin, northeastern Baja California, Mexico, inferred from Milankovitch climatic changes Juan Contreras Arturo Martín-Barajas Juan Carlos Herguera Ciencias de la Tierra Milankovitch cyclicity Gulf of California extensional province Laguna Salada in northern Baja California, Mexico, is an active half-graben product of the trans-tensional tectonics of theGulf of California. It is sensitive to changes in sediment supply from the Colorado River basin. We present a time series analysisof the upper 980 m of a gamma-ray log from a borehole drilled near the Laguna Salada fault. The power spectrum of the gammaraylog resembles the spectrum of δ18O Pleistocene isotopic variations from ice cores and from the deep ocean, known to bestrongly controlled by Milankovitch cycles. We correlate δ18O stages with silty and sandy intervals in the log. Downcore ages forthe last 780 ky are constrained within ~10 kyr. We derive a simple time vs. depth calibration relation for the basin over this timeinterval. Estimated sedimentation rates at the drill site appear to be constant with a value of ~1.6 mm/yr. We propose that thissubsidence rate is produced by the Laguna Salada fault. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844107 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.44 |
| title | Subsidence of the Laguna Salada Basin, northeastern Baja California, Mexico, inferred from Milankovitch climatic changes |
| topic | Ciencias de la Tierra Milankovitch cyclicity Gulf of California extensional province |
| url | https://www.redalyc.org/articulo.oa?id=56844107 |