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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
1997
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56836202 |
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| _version_ | 1866585596976168960 |
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| author | J. Urrutia Fucugauchi |
| author_facet | J. Urrutia Fucugauchi |
| contents | Rock-magnetic study of Late Pleistocene-Holocene sediments from the Babícora lacustrine basin, Chihuahua, northern Mexico J. Urrutia Fucugauchi R. Cruz Gatica J. Ortega Ramírez Ciencias de la Tierra Rock Quaternary sedimentology lake of Babícora State of Chihuahua Rock-magnetic and sedimentological studies of the Quaternary sequence of lakeBabícora (29.4°N, 107.7°W; 2,100 m a.s.l.) from Late Wisconsin to Holocene arereported. Two vertical profiles have been studied. Magnetic susceptibilities andnatural remanence (NRM) and isothermal remanence (IRM) intensities correlate withsand, silt and clay contents in the sediments, suggesting that magnetic minerals areallogenic. IRM acquisition curves and alternating field coercivity spectra documentthe occurrence of Ti-poor titanomagnetites, hematites and iron-hydroxides. Thefluctuations in the input of sediment correlate with changes in erosional processes,climate and tectonics in the catchment basin. Five radiocarbon dates ranging from4,346 to 16,343 yr B.P. were obtained. The southern profile covers a longer time spanthan the western profile, which spans from 11,000 to 6,000 yr B.P., when the lakeextended over a larger area. Two major periods of increased rainfall and high lakelevels in Late Pleistocene and Early Holocene are recognized. The Late Wisconsinwet period was followed by gradual drying up to around 6,000 yr B.P. Between11,000 and 8,000 yr B.P. there was another wet period, related to increased summerrainfall. The dry period between 3,000 and 2,000 yr B.P. was followed by widespreaderosion. 1997 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56836202 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.36 |
| format | Artículo científico |
| id | redalyc_56836202 |
| language | en |
| publishDate | 1997 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Rock-magnetic study of Late Pleistocene-Holocene sediments from the Babícora lacustrine basin, Chihuahua, northern Mexico J. Urrutia Fucugauchi Ciencias de la Tierra Rock Quaternary sedimentology lake of Babícora State of Chihuahua Rock-magnetic study of Late Pleistocene-Holocene sediments from the Babícora lacustrine basin, Chihuahua, northern Mexico J. Urrutia Fucugauchi R. Cruz Gatica J. Ortega Ramírez Ciencias de la Tierra Rock Quaternary sedimentology lake of Babícora State of Chihuahua Rock-magnetic and sedimentological studies of the Quaternary sequence of lakeBabícora (29.4°N, 107.7°W; 2,100 m a.s.l.) from Late Wisconsin to Holocene arereported. Two vertical profiles have been studied. Magnetic susceptibilities andnatural remanence (NRM) and isothermal remanence (IRM) intensities correlate withsand, silt and clay contents in the sediments, suggesting that magnetic minerals areallogenic. IRM acquisition curves and alternating field coercivity spectra documentthe occurrence of Ti-poor titanomagnetites, hematites and iron-hydroxides. Thefluctuations in the input of sediment correlate with changes in erosional processes,climate and tectonics in the catchment basin. Five radiocarbon dates ranging from4,346 to 16,343 yr B.P. were obtained. The southern profile covers a longer time spanthan the western profile, which spans from 11,000 to 6,000 yr B.P., when the lakeextended over a larger area. Two major periods of increased rainfall and high lakelevels in Late Pleistocene and Early Holocene are recognized. The Late Wisconsinwet period was followed by gradual drying up to around 6,000 yr B.P. Between11,000 and 8,000 yr B.P. there was another wet period, related to increased summerrainfall. The dry period between 3,000 and 2,000 yr B.P. was followed by widespreaderosion. 1997 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56836202 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.36 |
| title | Rock-magnetic study of Late Pleistocene-Holocene sediments from the Babícora lacustrine basin, Chihuahua, northern Mexico |
| topic | Ciencias de la Tierra Rock Quaternary sedimentology lake of Babícora State of Chihuahua |
| url | https://www.redalyc.org/articulo.oa?id=56836202 |