现代主要河流河口附近底层沉积物中贝叶岩成分的地球化学特征:它们在上游的稳定性如何?

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS
A. V. Maslov, I. A. Nemirovskaya, V. P. Shevchenko
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引用次数: 0

摘要

分析了伏尔加河灰色淤泥、勒拿河悬浮颗粒物和长江底泥中粉砂质颗粒物的若干地球化学特征((La/Yb)N、Eu/Eu* 和 Th 含量)。结果表明,几乎在所有情况下,上述软玉石归一化镧系元素光谱参数和钍含量都可与专门制备的(去除非本地稀土元素载体(碳酸盐矿物、Fe-Mn 氧氢氧化物和有机成分))沉积在指定主要河流河口附近的底层沉积物中的辉绿岩部分所测定的值相媲美,并且这些辉绿岩部分在其三角洲/河口上游数千公里处被保留下来。伏尔加河和长江水流的调节对悬浮颗粒物和底层沉积物参数的影响不大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Geochemical Characteristics of the Pelite Component of Bottom Sediments Near the Mouths of Modern Major Rivers: How Stable Are They Upstream?

Geochemical Characteristics of the Pelite Component of Bottom Sediments Near the Mouths of Modern Major Rivers: How Stable Are They Upstream?

Several geochemical characteristics ((La/Yb)N, Eu/Eu*, and Th content) of gray silts of the Volga River, suspended particulate matter of the Lena River, and silt–pelite fraction of bottom sediments in the Yangtze River are analyzed. It has been established that the above parameters of the chondrite-normalized lanthanide spectra and the Th content turn out in almost all cases to be comparable with their values determined for the specially prepared (removal of nonterrigenous carriers of rare earth elements (carbonate minerals, Fe–Mn oxyhydroxides, and organic components) pelite fractions of bottom sediments deposited near the mouths of named major rivers, and are retained over thousands of kilometers upstream from their deltas/mouths. The regulation of the Volga and Yangtze flows does not have a significant impact on parameters of the suspended particulate matter and bottom sediments under consideration.

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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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