布奥尔哈亚湾(拉普捷夫海)海底沉积物和永久冻土沉积物的元素组成

IF 0.3 Q4 GEOLOGY
A. S. Ulyantsev, N. V. Polyakova
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引用次数: 0

摘要

摘要 本文总结了2014-2015年在布奥尔哈亚湾从岸冰上钻取的1D-14、3D-14和1D-15号钻孔中获得的底层沉积物和永久冻土的岩性和元素组成数据。根据测定的沉积物中SiO2、Al2O3、Fe2O3、TiO2、MgO、Na2O、K2O、CaO、MnO、P2O5、Cl、Cr、S、Ni、Cu、Zn、Rb、Sr、Ba、Y、Zr和Corg的百分比含量,计算了岩石化学模量值,并对岩石成分和地球化学成分进行了对比分析。拉普捷夫海研究区域沿海地层(1D-14 和 3D-14 地层)和相对较远地层(1D-15 地层)之间的岩石化学成分存在差异,其原因是沉积通量的时空变化和风化壳活动。根据地质结构,所获得的解冻和永久冻土沉积物岩石化学成分数据表明,上霍扬斯克山系哈劳拉赫山脊的沉积岩(相当于砂岩、粉砂岩和泥岩)可能是岩石基金的基础。在钻探发现的地层中,火成岩和变质岩对沉积物质供应的贡献微乎其微,处于从属地位。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Elemental Composition of Bottom Sediments and Permafrost Deposits from Buor-Khaya Bay (Laptev Sea)

Elemental Composition of Bottom Sediments and Permafrost Deposits from Buor-Khaya Bay (Laptev Sea)

Abstract

The paper summarizes data on the lithological and elemental composition of bottom sediments and permafrost from boreholes 1D-14, 3D-14, and 1D-15 drilled from shore ice in Buor-Khaya Bay in 2014–2015. Based on the determined percentage content of SiO2, Al2O3, Fe2O3, TiO2, MgO, Na2O, K2O, CaO, MnO, P2O5, Cl, Cr, S, Ni, Cu, Zn, Rb, Sr, Ba, Y, Zr, and Corg in sediments, the values of lithochemical moduli were calculated, and a comparative analysis of the lithological and geochemical composition was performed. Differences in the lithochemical composition between the coastal (1D-14 and 3D-14) and relatively distant (1D-15) strata were shown, explained by the spatiotemporal variability of sedimentary fluxes and the weathering crust activity in the studied area of the Laptev Sea. Based on the geological structure, the obtained data on the lithochemical composition of thawed and permafrost deposits indicated that sedimentary rocks in the Kharaulakh Ridge of the Verkhoyansk mountain system, corresponding to sandstones, siltstones, and mudstones, were probably the basis of the petrofund. The contribution of igneous and metamorphic rocks to the supply of sedimentary matter in the strata uncovered by drilling was insignificant and of a subordinate nature.

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来源期刊
CiteScore
0.60
自引率
25.00%
发文量
43
期刊介绍: Moscow University Geology Bulletin  is the journal that mainly publishes scientific articles, short reports of graduate students, and reviews. Publications made by the members of the Faculty of Geology of the Moscow State University and their collaborators are published. Publications encompass all branches of geology.
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