气候变化领域集成服务门户(CCPortal): Sediment characteristics, geochemistry and XRF counts of composite core ICDP5045-1 and Co1261 at Lake Ohrid (Macedonia, Albania) down to 247 meter sediment depth

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DOI	https://doi.org/10.1594/PANGAEA.868255
	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
发布日期	2016-11-11
数据集类型	dataset
英文简介	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.
空间范围	Latitude: 41.049170 * Longitude: 20.715000
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215373
推荐引用方式 GB/T 7714	Francke,Alexander,Wagner,et al. Sediment characteristics, geochemistry and XRF counts of composite core ICDP5045-1 and Co1261 at Lake Ohrid (Macedonia, Albania) down to 247 meter sediment depth.2016-11-11.https://doi.org/10.1594/PANGAEA.868255.