Lithogeochemistry of Upper Precambrian Terrigenous Rocks of Belarus: Communication 2. Provenance, Paleogeodynamics, Paleogeography, and Paleoclimate

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Lithology and Mineral Resources Pub Date : 2024-09-02 DOI:10.1134/S002449022470069X
A. V. Maslov, O. Yu. Melnichuk, A. B. Kuznetsov, V. N. Podkovyrov
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Abstract

This paper completes the examination of results of the study of lithogeochemical characteristics of a pilot collection of the Riphean–Vendian sandstones, siltstones, and claystones (last one based on the interpretation of results) in Belarus. Data on the age of detrital zircon published in recent years suggest that Upper Precambrian rocks of this region were sourced from the Osnitsk–Mikashevichi and the Trans-Scandinavian igneous belts, the Volyn–Brest large igneous province, rapakivi granites, as well as various rock associations of Sarmatia, Danopolonian orogen and Svecofennides. Based on the lithogeochemical characteristics, the distribution of data points of the studied clastic rocks on discriminant diagrams provides insight into the possible provenance, paleogeodynamic, paleogeographic, and paleoclimatic settings and suggests several conclusions. The considered Riphean–Vendian stratons in Belarus are composed mainly of erosion products of within-plate granitoids, as well as various island-arc and syncollisional felsic igneous rocks. The share of erosion products of mafic rocks among them generally does not exceed 30%. It is significant mainly in the Volyn Group rocks (erosion products of the Volyn–Brest large igneous province), as well as in some samples of the Nizov, Selyavy, and Kotlin formations (fragments of mafic rocks from other provenances?). The source-to-sink transport was accomplished mainly by large rivers. Paleogeodynamic settings varied from quite active to quite passive. The paleoclimate in catchment areas was most likely arid/semiarid in the Riphean. In the Vendian, it was humid and varied from subtropical in the Early Vendian (except the Glusk Formation) to tropical in the Late Vendian. The obtained results also make it possible to show some peculiarities of the known methods and techniques of paleoclimate reconstruction.

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白俄罗斯上前寒武纪土著岩石的岩石地球化学:交流 2.产状、古地球动力学、古地理学和古气候
摘要 本文完成了对白俄罗斯里普安-文迪安砂岩、粉砂岩和粘土岩(最后一项基于对结果的解释)试点采集的岩石地球化学特征研究结果的审查。近年来公布的锆英石碎片年龄数据表明,该地区的上前寒武纪岩石来自奥斯尼茨克-米卡舍维奇和外斯堪的纳维亚火成岩带、沃伦-布列斯特大型火成岩省、拉帕基维花岗岩以及萨尔马特、多诺波隆造山带和斯维科芬尼德的各种岩石群。根据岩石地球化学特征,所研究碎屑岩的数据点在判别图上的分布情况可以让我们深入了解可能的出处、古地球动力学、古地理学和古气候环境,并提出若干结论。所研究的白俄罗斯 Riphean-Vendian 地层主要由板块内花岗岩的侵蚀产物以及各种岛弧和同步碰撞长粒火成岩组成。其中岩浆岩侵蚀产物的比例一般不超过 30%。主要在沃伦组岩石(沃伦-布列斯特大型火成岩省的侵蚀产物)以及尼佐夫、谢利亚维和科特林地层的一些样本(来自其他产地的岩浆岩碎片?)从源到汇的迁移主要由大河完成。古地球动力学环境从相当活跃到相当被动不等。在里皮安时期,集水区的古气候很可能是干旱/半干旱的。文迪安时期气候潮湿,从文迪安早期的亚热带气候(格拉斯克地层除外)到文迪安晚期的热带气候不等。研究结果还显示了已知古气候重建方法和技术的一些特殊性。
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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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