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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2003
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56842403 |
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| _version_ | 1866585867618877440 |
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| author | Vlad C. Manea |
| author_facet | Vlad C. Manea |
| contents | Sediment fill in the Middle America Trench inferred from gravity anomalies Vlad C. Manea Marina Manea Vladimir Kostoglodov Ciencias de la Tierra Mexico Subduction gravity anomalies trench sediment fill Middle America Trench A sequence of free-air gravity anomaly profiles across the Middle America Trench are used to model the sediment fill ofunconsolidated pelagic and hemipelagic sediment facies, and partially altered bedrock material. The shift of the free-air forearclow from the bathymetric minimum in the trench is used to estimate the amount of low-density sediment. The gravity effect of thefill is relatively small, suggesting that the dominant processes in the Middle America trench are sediment subduction and scrapingof unconsolidated pelagic sediments from the top of the subducting oceanic plate. The sediment volume in the trench tends toincrease southward from Jalisco to Oaxaca. In the Guatemala basin this tendency is less clear. There is some correlation betweenthe amount of fresh sediment fill and the convergence rate at the trench, except for the profiles with an extensive terrigenoussediment contribution or the areas of subduction of prominent bathymetric features. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842403 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.42 |
| format | Artículo científico |
| id | redalyc_56842403 |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Sediment fill in the Middle America Trench inferred from gravity anomalies Vlad C. Manea Ciencias de la Tierra Mexico Subduction gravity anomalies trench sediment fill Middle America Trench Sediment fill in the Middle America Trench inferred from gravity anomalies Vlad C. Manea Marina Manea Vladimir Kostoglodov Ciencias de la Tierra Mexico Subduction gravity anomalies trench sediment fill Middle America Trench A sequence of free-air gravity anomaly profiles across the Middle America Trench are used to model the sediment fill ofunconsolidated pelagic and hemipelagic sediment facies, and partially altered bedrock material. The shift of the free-air forearclow from the bathymetric minimum in the trench is used to estimate the amount of low-density sediment. The gravity effect of thefill is relatively small, suggesting that the dominant processes in the Middle America trench are sediment subduction and scrapingof unconsolidated pelagic sediments from the top of the subducting oceanic plate. The sediment volume in the trench tends toincrease southward from Jalisco to Oaxaca. In the Guatemala basin this tendency is less clear. There is some correlation betweenthe amount of fresh sediment fill and the convergence rate at the trench, except for the profiles with an extensive terrigenoussediment contribution or the areas of subduction of prominent bathymetric features. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842403 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.42 |
| title | Sediment fill in the Middle America Trench inferred from gravity anomalies |
| topic | Ciencias de la Tierra Mexico Subduction gravity anomalies trench sediment fill Middle America Trench |
| url | https://www.redalyc.org/articulo.oa?id=56842403 |