Paleoenvironmental Interpretation of Last Millennium Sediments in the Marriaga Swamp, Atrato Delta, Colombia
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| Format: | Artículo científico |
| Language: | en |
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Universidad Militar Nueva Granada
2021
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| _version_ | 1876469962241998848 |
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| author | Liliana Betancurth Montes |
| author_facet | Liliana Betancurth Montes |
| contents | Paleoenvironmental Interpretation of Last Millennium Sediments in the Marriaga Swamp, Atrato Delta, Colombia Liliana Betancurth Montes Julio Eduardo Cañón Barriga Ingeniería weathering paleoclimate trace elements Swamp sediments environmental reconstruction This paper presents the first paleoenvironmental reconstruction of the last 1,130 a of the Marriaga Swamp in the Atrato River delta in northwestern Colombia. The geochemical analyses of a 220 cm sediment core retrieved from the swamp reveal interesting climatic episodes and sedimentary changes in the last millennium. We split the core into three segments, according to sediment features, organic carbon content (OC), and geological ages. Records show different alternations of humid and dry periods, biological productivity, carbonate precipitation, weathering grade, and high heavy metal concentrations. The segments also concur with the geochemical differences determined by (Zr+Rb)/Sr, Ca/Ti Mn/Fe, OC/Ti, Mg/Ca Ba/Al, Sr/Al, and Ca/Al ratios. The older sequence (between 1,130 ± 90 a and 870 ± 70 a) shows a dry period with intermittent flooding events and high OC production in subareal conditions, followed by a more humid environment between 870 ± 70 a and 530 ± 40 a, with depletion of trace element ratios and OC. The more recent period (530 ± 40 a to present) evinces an environment dominated by the fluvial regime, based on a lower Ca/Al ratio and a rise of OC. The statistical correlations display three main clusters that distinguish among organic-biological productivity, bedrock source components, and heavy metal inputs. 2021 artículo científico 0124-8170 https://www.redalyc.org/articulo.oa?id=91168742001 https://www.redalyc.org/journal/911/91168742001/ https://www.redalyc.org/journal/911/91168742001/html/ https://www.redalyc.org/journal/911/91168742001/91168742001.epub https://www.redalyc.org/journal/911/91168742001/movil 10.18359/rcin.5071 en http://www.redalyc.org/revista.oa?id=911 Ciencia e Ingeniería Neogranadina application/pdf Universidad Militar Nueva Granada Ciencia e Ingeniería Neogranadina (Colombia) Num.1 Vol.31 |
| format | Artículo científico |
| id | redalyc_91168742001 |
| institution | Redalyc |
| language | en |
| publishDate | 2021 |
| publisher | Universidad Militar Nueva Granada |
| spellingShingle | Paleoenvironmental Interpretation of Last Millennium Sediments in the Marriaga Swamp, Atrato Delta, Colombia Liliana Betancurth Montes Ingeniería weathering paleoclimate trace elements Swamp sediments environmental reconstruction Paleoenvironmental Interpretation of Last Millennium Sediments in the Marriaga Swamp, Atrato Delta, Colombia Liliana Betancurth Montes Julio Eduardo Cañón Barriga Ingeniería weathering paleoclimate trace elements Swamp sediments environmental reconstruction This paper presents the first paleoenvironmental reconstruction of the last 1,130 a of the Marriaga Swamp in the Atrato River delta in northwestern Colombia. The geochemical analyses of a 220 cm sediment core retrieved from the swamp reveal interesting climatic episodes and sedimentary changes in the last millennium. We split the core into three segments, according to sediment features, organic carbon content (OC), and geological ages. Records show different alternations of humid and dry periods, biological productivity, carbonate precipitation, weathering grade, and high heavy metal concentrations. The segments also concur with the geochemical differences determined by (Zr+Rb)/Sr, Ca/Ti Mn/Fe, OC/Ti, Mg/Ca Ba/Al, Sr/Al, and Ca/Al ratios. The older sequence (between 1,130 ± 90 a and 870 ± 70 a) shows a dry period with intermittent flooding events and high OC production in subareal conditions, followed by a more humid environment between 870 ± 70 a and 530 ± 40 a, with depletion of trace element ratios and OC. The more recent period (530 ± 40 a to present) evinces an environment dominated by the fluvial regime, based on a lower Ca/Al ratio and a rise of OC. The statistical correlations display three main clusters that distinguish among organic-biological productivity, bedrock source components, and heavy metal inputs. 2021 artículo científico 0124-8170 https://www.redalyc.org/articulo.oa?id=91168742001 https://www.redalyc.org/journal/911/91168742001/ https://www.redalyc.org/journal/911/91168742001/html/ https://www.redalyc.org/journal/911/91168742001/91168742001.epub https://www.redalyc.org/journal/911/91168742001/movil 10.18359/rcin.5071 en http://www.redalyc.org/revista.oa?id=911 Ciencia e Ingeniería Neogranadina application/pdf Universidad Militar Nueva Granada Ciencia e Ingeniería Neogranadina (Colombia) Num.1 Vol.31 |
| title | Paleoenvironmental Interpretation of Last Millennium Sediments in the Marriaga Swamp, Atrato Delta, Colombia |
| topic | Ingeniería weathering paleoclimate trace elements Swamp sediments environmental reconstruction |
| url | https://www.redalyc.org/articulo.oa?id=91168742001 https://www.redalyc.org/journal/911/91168742001/ https://www.redalyc.org/journal/911/91168742001/html/ https://www.redalyc.org/journal/911/91168742001/91168742001.epub https://www.redalyc.org/journal/911/91168742001/movil |