Sediment characteristics, geochemistry and XRF counts of composite core ICDP5045-1 and Co1261 at Lake Ohrid (Macedonia, Albania) down to 247 meter sediment depth
Fuente:
PANGAEA
Guardado en:
| Autores principales: | , , , , , , , , , , , , , |
|---|---|
| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2016
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1867170470541918208 |
|---|---|
| author | Francke, Alexander Wagner, Bernd Just, Janna Leicher, Niklas Gromig, Raphael Baumgarten, Henrike Vogel, Hendrik Lacey, Jack H Sadori, Laura Wonik, Thomas Leng, Melanie J Zanchetta, Giovanni Sulpizio, Roberto Giaccio, Biagio |
| author_facet | Francke, Alexander Wagner, Bernd Just, Janna Leicher, Niklas Gromig, Raphael Baumgarten, Henrike Vogel, Hendrik Lacey, Jack H Sadori, Laura Wonik, Thomas Leng, Melanie J Zanchetta, Giovanni Sulpizio, Roberto Giaccio, Biagio |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Lake Ohrid (Macedonia, Albania) is thought to be more than 1.2 million years old and host more than 300 endemic species. As a target of the International Continental scientific Drilling Program (ICDP), a successful deep drilling campaign was carried out within the scope of the Scientific Collaboration on Past Speciation Conditions in Lake Ohrid (SCOPSCO) project in 2013. Here, we present lithological, sedimentological, and (bio-)geochemical data from the upper 247.8m composite depth of the overall 569m long DEEP site sediment succession from the central part of the lake. According to an age model, which is based on 11 tephra layers (first-order tie points) and on tuning of bio-geochemical proxy data to orbital parameters (second-order tie points), the analyzed sediment sequence covers the last 637 kyr. The DEEP site sediment succession consists of hemipelagic sediments, which are interspersed by several tephra layers and infrequent, thin (< 5 cm) mass wasting deposits. The hemipelagic sediments can be classified into three different lithotypes. Lithotype 1 and 2 deposits comprise calcareous and slightly calcareous silty clay and are predominantly attributed to interglacial periods with high primary productivity in the lake during summer and reduced mixing during winter. The data suggest that high ion and nutrient concentrations in the lake water promoted calcite precipitation and diatom growth in the epilimnion during MIS15, 13, and 5. Following a strong primary productivity, highest interglacial temperatures can be reported for marine isotope stages (MIS) 11 and 5, whereas MIS15, 13, 9, and 7 were comparably cooler. Lithotype 3 deposits consist of clastic, silty clayey material and predominantly represent glacial periods with low primary productivity during summer and longer and intensified mixing during winter. The data imply that the most severe glacial conditions at Lake Ohrid persisted during MIS16, 12, 10, and 6, whereas somewhat warmer temperatures can be inferred for MIS14, 8, 4, and 2. Interglacial-like conditions occurred during parts of MIS14 and 8. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_868255 |
| institution | PANGAEA |
| language | en |
| publishDate | 2016 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sediment characteristics, geochemistry and XRF counts of composite core ICDP5045-1 and Co1261 at Lake Ohrid (Macedonia, Albania) down to 247 meter sediment depth Francke, Alexander Wagner, Bernd Just, Janna Leicher, Niklas Gromig, Raphael Baumgarten, Henrike Vogel, Hendrik Lacey, Jack H Sadori, Laura Wonik, Thomas Leng, Melanie J Zanchetta, Giovanni Sulpizio, Roberto Giaccio, Biagio DEEP; Deep Lake Drilling System; DLDS; ICDP5045-1; Lake Ohrid, Macedonian/Albanian border Lake Ohrid (Macedonia, Albania) is thought to be more than 1.2 million years old and host more than 300 endemic species. As a target of the International Continental scientific Drilling Program (ICDP), a successful deep drilling campaign was carried out within the scope of the Scientific Collaboration on Past Speciation Conditions in Lake Ohrid (SCOPSCO) project in 2013. Here, we present lithological, sedimentological, and (bio-)geochemical data from the upper 247.8m composite depth of the overall 569m long DEEP site sediment succession from the central part of the lake. According to an age model, which is based on 11 tephra layers (first-order tie points) and on tuning of bio-geochemical proxy data to orbital parameters (second-order tie points), the analyzed sediment sequence covers the last 637 kyr. The DEEP site sediment succession consists of hemipelagic sediments, which are interspersed by several tephra layers and infrequent, thin (< 5 cm) mass wasting deposits. The hemipelagic sediments can be classified into three different lithotypes. Lithotype 1 and 2 deposits comprise calcareous and slightly calcareous silty clay and are predominantly attributed to interglacial periods with high primary productivity in the lake during summer and reduced mixing during winter. The data suggest that high ion and nutrient concentrations in the lake water promoted calcite precipitation and diatom growth in the epilimnion during MIS15, 13, and 5. Following a strong primary productivity, highest interglacial temperatures can be reported for marine isotope stages (MIS) 11 and 5, whereas MIS15, 13, 9, and 7 were comparably cooler. Lithotype 3 deposits consist of clastic, silty clayey material and predominantly represent glacial periods with low primary productivity during summer and longer and intensified mixing during winter. The data imply that the most severe glacial conditions at Lake Ohrid persisted during MIS16, 12, 10, and 6, whereas somewhat warmer temperatures can be inferred for MIS14, 8, 4, and 2. Interglacial-like conditions occurred during parts of MIS14 and 8. |
| title | Sediment characteristics, geochemistry and XRF counts of composite core ICDP5045-1 and Co1261 at Lake Ohrid (Macedonia, Albania) down to 247 meter sediment depth |
| topic | DEEP; Deep Lake Drilling System; DLDS; ICDP5045-1; Lake Ohrid, Macedonian/Albanian border |
| url | https://doi.org/10.1594/PANGAEA.868255 |