Kongsfjorden和Krossfjorden新近底栖有孔虫的分布斯瓦尔巴群岛西北部,北极高地

IF 0.5 4区 地球科学 Q4 PALEONTOLOGY Journal of the Palaeontological Society of India Pub Date : 2023-09-21 DOI:10.1177/05529360231183470
Debolina Chatterjee, Anupam Ghosh
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引用次数: 0

摘要

研究了斯瓦尔巴海峡两个峡湾——高北极的kongsjorden和Krossfjorden的底栖有孔虫组合。有孔虫组合表现为两个峡湾冰川近端、中端和远端三个特征组合。在冰川近端,有孔虫动物区系以Cassidulina reniforme - Elphidium clavatum, texularia spp.组合为主,表明沉积和融水径流增加;a Nonionellina labradorica - Islandiella helenae - Lobatula Lobatula组合属于富氧高能量环境,主要占据中部;在远端区域以拉布拉多丽草- helenae组合为主,表明地表初级生产力较高。Krossfjorden在中间部分周围有一个缺氧区,其特征是Stainforthia loeblichi。岛上菌(Islandiella helenae)和拉布拉多菌(Nonionellina labradorica)的丰度表明,Krossfjorden的地表初级生产力高于kongsjorden。
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Distribution of recent Benthic foraminifera in Kongsfjorden and Krossfjorden; North-West Svalbard, High Arctic
Benthic foraminifera assemblages from two fjords of Svalbard—Kongsfjorden and Krossfjorden in the High Arctic—have been studied. The foraminifera assemblages show three characteristic assemblages from the two fjords’ glacial proximal, middle and distal parts. The Cassidulina reniforme– Elphidium clavatum, Textularia spp. assemblage dominates the foraminifera fauna near the glacier proximal that indicates increased sedimentation and meltwater runoff; a Nonionellina labradorica– Islandiella helenae– Lobatula lobatula assemblage relates to well-oxygenated and high energy conditions and mainly occupies the middle part; and the Nonionellina labradorica– Islandiella helenae assemblages dominate in the distal region that indicates high surface primary productivity. Krossfjorden contains an oxygen deficiency zone around the middle part characterised by Stainforthia loeblichi. The abundance of Islandiella helenae and Nonionellina labradorica indicates that the high surface primary productivity of Krossfjorden is more than that of Kongsfjorden.
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来源期刊
CiteScore
1.10
自引率
16.70%
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期刊介绍: The journal is devoted to the publication of original papers and review articles dealing with all aspects of Paleontology, Paleobotany, Stratigraphy, Geochronology, Anthropology and Pre-history.
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