Sponge spicules as proxy in Upper Quaternary lake deposits near Cianorte (PR): a tentative correlation with lakes of Central-Southern Brazil (NW Paraná and SE Mato Grosso do Sul

Q3 Earth and Planetary Sciences

Quaternary and Environmental Geosciences Pub Date : 2018-08-13 DOI:10.5380/ABEQUA.V9I2.51816

Andréa Barbieri Rezende, J. Stevaux, M. Parolin, R. L. Guerreiro

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引用次数: 1

Abstract

Researchers recognize the use of bio-proxy in Quaternary paleo environment reconstruction for more than 50 years. Among the bio-indicators, pollens and spores are, by far, the most used palynomorphs, followed by diatoms. However, oxidizing conditions can destroy and leach organic material. In such cases, sponge spicules, with siliceous skeleton, resist geochemist weathering and diagenesis, preserving in the sediment. This paper proposes an experimental correlation between sponge analyses obtained from lakes sediment in the NW Parana and SE Mato Grosso do Sul States, Brazil, in a pioneering attempt of paleoclimatic data integration for the south-central Brazil. The structures used to identify the sponges were megascleres, microscleres and gemmoscleres. Both short- and long-distance correlations were satisfactory. Although a temporal and genetic correlation between lakes of NW Parana and SE Mato Grosso do Sul lakes has been observed, their hydrological functioning was different.

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Cianorate（PR）附近上第四纪湖泊沉积物中海绵状针状物的替代物：与巴西中南部（巴拉那西北部和南马托格罗索东南部）湖泊的初步相关性

研究人员认识到生物替代物在第四纪古环境重建中的应用已有50多年的历史。在生物指示剂中，花粉和孢子是迄今为止最常用的孢子形态，其次是硅藻。然而，氧化条件会破坏和浸出有机物质。在这种情况下，具有硅质骨架的海绵针状物能够抵抗地球化学风化和成岩作用，保存在沉积物中。本文提出了从巴西巴拉那州西北部和南马托格罗索州东南部湖泊沉积物中获得的海绵分析之间的实验相关性，这是巴西中南部古气候数据整合的开创性尝试。用于鉴定海绵的结构有大巩膜、微巩膜和单巩膜。短距离和长距离相关性均令人满意。尽管已经观察到巴拉那西北部和南马托格罗索东南部湖泊之间的时间和遗传相关性，但它们的水文功能不同。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Quaternary and Environmental Geosciences Earth and Planetary Sciences-Earth-Surface Processes

CiteScore

0.40

自引率

0.00%

发文量

审稿时长

24 weeks

期刊介绍： Quaternary and Environmental Geosciences (QEG) is for the publication of unpublished works in the areas of quaternary and environmental geosciences. QEG aims to publish high quality works on all Quaternary areas and environmental geosciences, from laboratory techniques to synthesis works. It aims to publish works from areas as diverse as climate variability and change, paleovegetation, paleoclimate and paleoenvironments, coastal geology and geomorphology, sea level variations, neotectonics, continental morphogenetic processes and products, sediment and soil geochemistry, geological hazards and paleoenvironment. , relationships between natural and anthropic geological processes, among others. We emphasize interest in interdisciplinary work. We discourage the publication of works that are not clearly linked with the Quaternary or the Environmental Geosciences. The main criterion for acceptance of the papers is their quality, originality, significance and interest to a broad regional to international community.