Sedimentology and geomorphology of Lake Yamma Yamma - A long-lived structurally controlled playa lake of the Lake Eyre Basin, Australia

IF 0.8 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Transactions of the Royal Society of South Australia Pub Date : 2022-01-02 DOI:10.1080/03721426.2022.2027649
S. Mann, K. Amos
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引用次数: 1

Abstract

ABSTRACT Intraplate tectonism and continental climate change have important roles in the evolution of the arid Lake Eyre Basin, one of the world’s largest interior basins, and a place with economic, environmental, and cultural significance for many Australians. Just off one of the main rivers of the Basin, Cooper Creek, Lake Yamma Yamma – a 20 km by 40 km ephemeral feature – traps sediment ~750 km upstream and ~90 m higher than the ultimate base level of the Basin – Kati Thanda-Lake Eyre. This paper is the first to report on the sedimentology and geomorphic evolution of this modern ephemeral playa lake. Field-based sedimentology, laboratory-based grain size analysis, satellite image interpretation, inundation frequency maps, hydrological data, and digital elevation data, were used to interpret sedimentary processes and the evolution of the lake. Results suggest Lake Yamma Yamma is a long-lived feature. Evolution is primarily structurally controlled, with the main lake delta migrating north-west over time. Quaternary fluvial, lacustrine and aeolian deposition is likely controlled by intraplate tectonism, and palaeo-shorelines may be remnant features of a prior climate regime. Age dating of this sedimentary archive could provide important information on the history, palaeoclimate, and evolution of the Lake Eyre Basin, and the Australian continent.
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亚玛湖的沉积学和地貌学亚玛湖-澳大利亚艾尔湖盆地的一个长期存在的结构控制的playa湖
板块内构造和大陆气候变化在干旱的艾尔湖盆地的演化中起着重要作用。艾尔湖盆地是世界上最大的内陆盆地之一,对许多澳大利亚人来说具有经济、环境和文化意义。就在盆地主要河流之一的库柏溪附近,亚玛湖——一个长20公里,宽40公里的短暂特征——在上游750公里处,比盆地的最终基准面——卡蒂坦达湖——艾尔湖高出约90米。本文首次报道了该现代浅生湖的沉积学和地貌演化。利用野外沉积学、实验室粒度分析、卫星图像解译、淹没频率图、水文数据和数字高程数据来解释湖泊的沉积过程和演化。结果表明,山马湖是一个长期存在的特征。演化主要受构造控制,随着时间的推移,主要的湖泊三角洲向西北迁移。第四纪河流、湖泊和风成沉积可能受板内构造作用控制,古海岸线可能是先前气候制度的残余特征。这些沉积档案的年代定年可以为艾尔湖盆地和澳大利亚大陆的历史、古气候和演化提供重要信息。
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来源期刊
CiteScore
1.40
自引率
12.50%
发文量
17
审稿时长
>12 weeks
期刊介绍: Published since 1880, the Transactions of the Royal Society of South Australia is a multidisciplinary journal that aims to publish high quality, peer-reviewed papers of particular relevance to Australasia. There is a particular focus on natural history topics such as: botany, zoology, geology, geomorphology, palaeontology, meteorology, geophysics, biophysics, soil science and environmental science, and environmental health. However, the journal is not restricted to these fields, with papers concerning epidemiology, ethnology, anthropology, linguistics, and the history of science and exploration also welcomed. Submissions are welcome from all authors, and membership of the Royal Society of South Australia is not required. The following types of manuscripts are welcome: Reviews, Original Research Papers, History of Science and Exploration, Brief Communications, Obituaries.
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