High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca Basin (Western Mediterranean, SE Spain)
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| Natura: | Artículo científico |
| Lingua: | en |
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Universitat de Barcelona
2006
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| _version_ | 1876447301066555392 |
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| author | C. Thrana |
| author_facet | C. Thrana |
| contents | High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca Basin (Western Mediterranean, SE Spain) C. Thrana M.R. Talbot Ciencias de la Tierra Sea Spain Miocene level change siliciclastics The Upper Miocene Parilla Formation, Lorca Basin, Spain, provides an example of stacked high-frequencycycles of mixed carbonates and siliciclastics. Cycles developed on a steep carbonate ramp bordering an alluvialfansystem. Three cycle variants are distinguished: siliciclastic-dominated cycles at the proximal part of theramp, mid-ramp mixed carbonate siliciclastic cycles, and carbonate-dominated cycles on the more distal partsof the ramp. The vertical thickness of these stacked simple sequences ranges from 0.7 up to 8 m. High-frequencychanges in relative sea level resulted in a dynamic interplay between terrigenous sediment supply and carbonateproduction rates. During falling stage and lowstands, the alluvial system migrated basinwards andcoarse-grained siliciclastics were deposited, whereas rising sea level and highstands provided optimal conditionsfor the production and accumulation of biogenic carbonates. Coral colonies up to 4 m thick provide a minimummeasure of the magnitude of sea-level change involved in the development of the cycles. In contrast topreviously documented simple carbonate sequences, this hybrid system of carbonates and siliciclastics preservesa more complete record of cyclic sea-level change, where terrigenous sediment supply compensated forthe reduction in carbonate production during periods of falling and low sea level. 2006 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50540301 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.3 Vol.4 |
| format | Artículo científico |
| id | redalyc_50540301 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universitat de Barcelona |
| spellingShingle | High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca Basin (Western Mediterranean, SE Spain) C. Thrana Ciencias de la Tierra Sea Spain Miocene level change siliciclastics High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca Basin (Western Mediterranean, SE Spain) C. Thrana M.R. Talbot Ciencias de la Tierra Sea Spain Miocene level change siliciclastics The Upper Miocene Parilla Formation, Lorca Basin, Spain, provides an example of stacked high-frequencycycles of mixed carbonates and siliciclastics. Cycles developed on a steep carbonate ramp bordering an alluvialfansystem. Three cycle variants are distinguished: siliciclastic-dominated cycles at the proximal part of theramp, mid-ramp mixed carbonate siliciclastic cycles, and carbonate-dominated cycles on the more distal partsof the ramp. The vertical thickness of these stacked simple sequences ranges from 0.7 up to 8 m. High-frequencychanges in relative sea level resulted in a dynamic interplay between terrigenous sediment supply and carbonateproduction rates. During falling stage and lowstands, the alluvial system migrated basinwards andcoarse-grained siliciclastics were deposited, whereas rising sea level and highstands provided optimal conditionsfor the production and accumulation of biogenic carbonates. Coral colonies up to 4 m thick provide a minimummeasure of the magnitude of sea-level change involved in the development of the cycles. In contrast topreviously documented simple carbonate sequences, this hybrid system of carbonates and siliciclastics preservesa more complete record of cyclic sea-level change, where terrigenous sediment supply compensated forthe reduction in carbonate production during periods of falling and low sea level. 2006 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50540301 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.3 Vol.4 |
| title | High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca Basin (Western Mediterranean, SE Spain) |
| topic | Ciencias de la Tierra Sea Spain Miocene level change siliciclastics |
| url | https://www.redalyc.org/articulo.oa?id=50540301 |