The Geochemical Characteristics of Hydrothermal Sediment for the Bedded Silicilith in the Meso Proterozoic Era and Their Sedimentary Environment Importance in Pingyin, Shandong Province

Acta Scientiarum Naturalium Universitatis Pekinensis

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The Geochemical Characteristics of Hydrothermal Sediment for the Bedded Silicilith in the Meso Proterozoic Era and Their Sedimentary Environment Importance in Pingyin, Shandong Province

XU Yuetong¹, ZHOU Baohua¹, HUANG Fusheng²

¹Department of Geography, Shandong Teacher's University, Jinan, 250014; Department of Geology, Peking University, Beijing, 100871

Received:1996-08-26 Online:1997-03-20 Published:1997-03-20

山东平阴地区中元古代层状硅质岩热水沉积地球化学特征及沉积环境意义

徐跃通¹, 周保华¹, 黄福生²

¹山东师范大学地理学系，济南，250014; ²北京大学地质学系，北京，100871

Abstract

Abstract: There are bedded siliciliths which are conformity with the Mesoproterozoic Erathem stratum in Pingyin Area, Shandong Province. The siliciliths can be identified as hydrothermal sediment ones by the higher contents of Fe, Mn, As, Sb, Bi, Ga, and comparatively lower Al; lower total REE, negative Ce anomaly and comparatively enrichment in HREE, the δ³⁰Si values range from -0.01% to 0.04%, the δ³⁰O values range from 1.36% to 2.01%. The siliciliths all belong to hydrothermal sediment ones in Al-Fe-Mn and Fe-Mn-(Ni+Co+Cu) triangle diagrams. And the values of MnO/TiO₂ ratioes, δCe and δ³⁰Si in these siliciliths manifest that the siliciliths are deposited in the deep-sea environment.

Key words: Silicilith, geochemistry, hydrothermal sediment, sedimentary environment

摘要： 在山东平阴地区中元古界地层中存在与地层整合产出的层状硅质岩。硅质岩富Fe、Mn，相对贫Al; 富集As、Sb、Bi、Ga; REE总量低，Ce负异常，HREE相对富集；(δ³⁰Si变化范围为-0.1‰～0.4‰，δ¹⁸O变化范围为+13.6‰～+20.1‰，具有热水沉积硅质岩的地球化学特征。在Al-Fe-Mn和Fe-Mn-(Ni+Co+Cu)三角图上均属热水沉积硅质岩。硅质岩MnO/TiO₂比值、δCe值和δ³⁰Si值分析表明本区层状硅质岩主要是在深海环境下沉积的。

关键词: 硅质岩, 地球化学, 热水沉积, 沉积环境

CLC Number:

P588.34

XU Yuetong,ZHOU Baohua,HUANG Fusheng. The Geochemical Characteristics of Hydrothermal Sediment for the Bedded Silicilith in the Meso Proterozoic Era and Their Sedimentary Environment Importance in Pingyin, Shandong Province[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

徐跃通, 周保华, 黄福生. 山东平阴地区中元古代层状硅质岩热水沉积地球化学特征及沉积环境意义[J]. 北京大学学报（自然科学版）.

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https://xbna.pku.edu.cn/EN/Y1997/V33/I2/167

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The Geochemical Characteristics of Hydrothermal Sediment for the Bedded Silicilith in the Meso Proterozoic Era and Their Sedimentary Environment Importance in Pingyin, Shandong Province

山东平阴地区中元古代层状硅质岩热水沉积地球化学特征及沉积环境意义

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