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Features of Bitumoid Distribution in Bottom Sediments of the Barents Sea
Oceanology ( IF 1 ) Pub Date : 2021-03-02 , DOI: 10.1134/s0001437020050057
Yu. S. Glyaznetsova , I. A. Nemirovskaya

Abstract

The results on the content, composition, and distribution of chloroform bitumoids (CBs) in the Holocene sediments of the Barents Sea are presented (Cruise 68 of the R/V Akademik Mstislav Keldysh, July–August 2017). Depending on the sedimentation conditions, CB concentrations varied on average (μg/g of dry mass) as follows: Novaya Zemlya Archipelago (174) > Svalbard Archipelago (131) > Western part (78) > Central part (69) > Franz Josef Land (52). Hydrocarbons comprised almost half (46% on average with the maximum of 85%) in the composition of CBs. Their distribution in the thickness of sediments is different and depends not only on the particle-size composition of sediments and the content of organic matter in them, but also on the variability of redox conditions and fluid flows of hydrocarbons from a sedimentary stratum. Therefore, markers of alkane composition and IR-Fourier spectra indicated both sedimentary (Murmansk bank, the Franz Josef Land shelf) and point oil (shelf of Svalbard Archipelago, Medvezhinskii Trench) sources of hydrocarbons.



中文翻译:

巴伦支海底沉积物的沥青分布特征

摘要

给出了巴伦支海全新世沉积物中氯仿沥青的含量,组成和分布的结果(R / V Akademik Mstislav Keldysh巡游68,2017年7月至8月)。取决于沉积条件,CB浓度平均变化(微克/克干重)如下:Novaya Zemlya群岛(174)> Svalbard群岛(131)>西部(78)>中部(69)> Franz Josef Land (52)。碳氢化合物的成分几乎占一半(平均占46%,最大占85%)。它们在沉积物厚度中的分布是不同的,不仅取决于沉积物的颗粒大小组成和其中的有机物含量,还取决于氧化还原条件的变化性和来自沉积地层的碳氢化合物的流量。因此,烷烃组成和IR-傅里叶光谱的标记物既显示了沉积物(摩尔曼斯克河岸,弗朗茨·约瑟夫土地架)又显示了点油(斯瓦尔巴群岛的陆架,

更新日期:2021-03-03
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