Abstract

The article presents a brief lithological description of modern bottom sediments collected in the Barents Sea during Cruise 67 of the R/V Akademik Mstislav Keldysh at test sites: (1) “Pechora Sea”; (2) “Western slope of the Kanin Shoal”; (3) “Central Barents Sea (Shtokman area)”; (4) “Russkaya Gavan Fjord”; (5) “Medvezhinsky Trough”; (6) area south of Spitsbergen; (7) “Kola Meridian”; (8) “Spitsbergen–Franz Josef Land Archipelago”; (9) “Cambridge Strait.” Distribution of Cr, Ni, Cu, Zn, Cd, and Pb in samples of modern bottom sediments (pelitic, aleuritic–pelitic and sandy–aleuritic–pelitic ooze) is compared with background concentrations and contents of these elements in the Post-Archean Australian Shale (PAAS). The data obtained are consistent with the notion that the distribution of heavy metals and other elements in bottom sediments is controlled primarily by the global geochemical background. Relationship of Sc, V, Cr, Ni, Y, Zr, Nb, Mo, Hf, Th, U, and REE concentrations with contents of the fine pelite (<0.001 mm) fraction and organic carbon (C_org) is considered. It was found that most of these elements are characterized by a moderate positive correlation with the fine pelite fraction in samples. Based on the coefficient of their correlation with the C_org content, the above elements can be assigned to three groups with: (1) moderate positive correlation, (2) low positive correlation, and (3) virtual absence of correlation. Distribution of element-indicators of the source rock composition (Sc, Th, Co, Cr, La, and Sm) and REE in modern bottom sediments of the Barents Sea indicates that the majority of them are geochemically mature, and they were sourced from the Kola Peninsula and Spitsbergen (?).Bottom sediments of the Cambridge Strait are represented by geochemically less mature material, which, apparently, entered the sea as a result of erosion of rocks of the Franz Josef Land Archipelago.

中文翻译：

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巴伦支海现代海底沉积物中的稀有和微量元素

摘要

本文简要介绍了R / V Akademik Mstislav Keldysh巡游67期间在巴伦支海收集的现代海底沉积物的岩性描述。在测试地点：（1）“ Pechora Sea”；（2）“卡宁浅滩的西坡”；（3）“中巴伦支海（史托克曼地区）”；（4）“ Russkaya Gavan峡湾”；（5）“梅德韦任斯基槽”；（6）斯匹次卑尔根以南的地区；（7）“可乐子午线”；（8）“斯匹次卑尔根-弗朗兹·约瑟夫土地群岛”；（9）“剑桥海峡”。将现代底部沉积物样品中的Cr，Ni，Cu，Zn，Cd和Pb的分布（石质，奥氏体-石质和砂质-非脲体-石质软泥）与背景浓度和这些元素的含量进行比较，以了解后Archean澳大利亚页岩（PAAS）。所获得的数据与以下观点一致：底部沉积物中的重金属和其他元素的分布主要受全球地球化学背景的控制。Sc，V，Cr，Ni，Y，Zr，Nb，Mo，Hf，Th，U的关系_org）。发现大多数这些元素的特征是与样品中细的贝氏体部分具有适度的正相关。基于它们与C _org的相关系数在内容方面，上述元素可以分为三组：（1）中等正相关，（2）低正相关，和（3）虚相关。巴伦支海现代底部沉积物中烃源岩成分（Sc，Th，Co，Cr，La和Sm）和REE的元素指示剂分布表明，它们大多数是地球化学成熟的，并且来自于柯拉半岛和斯匹次卑尔根（？）。剑桥海峡底部的沉积物以地球化学上较不成熟的物质为代表，显然是由于弗朗兹·约瑟夫（Franz Josef Land）群岛的岩石侵蚀而进入海中的。