气候变化领域集成服务门户(CCPortal): (Table 1) Clay and non-clay mineral composition of dirty ice samples from across the Arctic

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.808630
	(Table 1) Clay and non-clay mineral composition of dirty ice samples from across the Arctic
	Darby; Dennis A; Myers; Wesley B; Jakobsson; Martin; Rigor; Ignatius
发布日期	2011-03-07
数据集类型	dataset
英文简介	Extensive dirty ice patches with up to 7 kg/m**2 sediment concentrations in layers of up to 10 cm thickness were encountered in 2005 and 2007 in numerous areas across the central Arctic. The Fe grain fingerprint determination of sources for these sampled dirty ice floes indicated both Russian and Canadian sources, with the latter dominating. The presence of benthic shells and sea weeds along with thick layers (2-10 cm) of sediment covering 5-10 m2 indicates an anchor ice entrainment origin as opposed to suspension freezing for some of these floes. The anchor ice origin might explain the dominance of Canadian sources where only narrow flaw leads occur that would not favor suspension freezing as an entrainment process. Expandable clays, commonly used as an indicator of a Kara Sea origin for dirty sea ice, are present in moderately high percentages (>20%) in many circum-Arctic source areas, including the Arctic coasts of North America. Some differences between the Russian and the North American coastal areas are found in clay mineral abundance, primarily the much higher abundance of chlorite in North America and the northern Barents Sea as opposed to the rest of the Russian Arctic. However, sea ice clay mineralogy matched many source areas, making it difficult to use as a provenance tool by itself. The bulk mineralogy (clay and non-clay) does not match specific sources possibly due to reworking of the sediment in dirty floes through summer melting or the failure to characterize all possible source areas.
空间范围	Median Latitude: 76.913688 * Median Longitude: -27.893148 * South-bound Latitude: 66.800000 * West-bound Longitude: -170.400000 * North-bound Latitude: 89.991300 * East-bound Longitude: 179.300000
时间范围	2005-08-30T00:00:00 - 2007-08-21T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	冰冻圈
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/213770
推荐引用方式 GB/T 7714	Darby,Dennis A,Myers,et al. (Table 1) Clay and non-clay mineral composition of dirty ice samples from across the Arctic.2011-03-07.https://doi.org/10.1594/PANGAEA.808630.