白俄罗斯上前寒武纪土著岩石的岩石地球化学:通讯 1.块体化学成分、总体特征和异常现象

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS
A. V. Maslov, O. Yu. Melnichuk, A. B. Kuznetsov, V. N. Podkovyrov
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引用次数: 0

摘要

摘要 本文是两篇通讯中的第一篇,专门研究从四个钻孔中采集的上前寒武纪砂岩和粉砂岩样品的岩石地球化学特征:Bogushevskaya 1、Bykhovskaya、Lepel 1 和 Kormyanskaya(白俄罗斯)。这篇文章分析了这些样本大体化学成分的一般特征,并说明了进一步重建的可能性和局限性。已确定的是,试验性采集中被目测为砂岩的Riphean和Vendian岩石实际上是具有不同胶结类型的石英、长石-石英和水成岩。就地球化学特征而言,文登 "粉砂岩 "属于粗粒和细粒粉砂岩,在更大程度上属于泥岩,主要成分为伊利石,以及各种混合的贝铁矿、高岭石和直闪石。根据痕量元素富集因子(EF)的比较,这些岩石具有一些与源岩成分和沉积环境变化有关的差异。样本在 Zr/Sc-Th/Sc 图上的数据点表明,所有研究的里皮安和文登岩石都以第一沉积周期物质为主,这表明试点采集岩石的岩石地球化学特征非常正确地反映了源岩复合体的相似特征。因此,它们可用于重建控制白俄罗斯里皮安和文登沉积序列堆积的古地球动力学和古气候因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Lithogeochemistry of Upper Precambrian Terrigenous Rocks in Belarus: Communication 1. Bulk Chemical Composition, General Features, and Anomalies

Lithogeochemistry of Upper Precambrian Terrigenous Rocks in Belarus: Communication 1. Bulk Chemical Composition, General Features, and Anomalies

Lithogeochemistry of Upper Precambrian Terrigenous Rocks in Belarus: Communication 1. Bulk Chemical Composition, General Features, and Anomalies

The first of two communications is devoted to the study of lithogeochemical features of the pilot collection of Upper Precambrian sandstone and siltstone samples taken from four boreholes: Bogushevskaya 1, Bykhovskaya, Lepel 1, and Kormyanskaya (Belarus). This article analyzes the general features of their bulk chemical composition and shows the possibilities and limitations for further reconstructions. It has been established that Riphean and Vendian rocks included in the pilot collection, visually identified as sandstones, are actually quartz, feldspar–quartz, and arkosic varieties with different cement types. In terms of geochemical characteristics, the Vendian “siltstones” correspond to the coarse- and fine-grained siltstones and, to a greater extent, mudstones with a predominance of illite, as well as various admixtures of berthierine, kaolinite, and smectite. Based on the comparison of enrichment factor (EF) of the trace element, these rocks are marked by several dissimilarities related to both variations in the source rock composition and sedimentary environment. Data points of the samples on the Zr/Sc–Th/Sc diagram indicate that all of the studied Riphean and Vendian rocks are dominated by the first sedimentation cycle material, suggesting that the lithogeochemical characteristics of the pilot collection rocks quite correctly reflect similar features of the source rock complexes. Therefore, they can be used to reconstruct the paleogeodynamic and paleoclimatic factors that controlled the accumulation of Riphean and Vendian sedimentary sequences in Belarus.

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来源期刊
Lithology and Mineral Resources
Lithology and Mineral Resources 地学-地球化学与地球物理
CiteScore
1.30
自引率
37.50%
发文量
29
审稿时长
>12 weeks
期刊介绍: Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.
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