Lithological controls on soil properties, Snow Island, Maritime Antarctica

IF 3 3区 地球科学 Q2 GEOGRAPHY, PHYSICAL
D. V. Lopes, Fábio Soares de Oliveira, João Santiago Reis, Carlos Ernesto G. R. Schaefer
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Abstract

Soil–parent material is a critical controlling factor of soil properties in the Antarctic region due to a limited degree of soil development. However, the degree to which soil–parent material can be considered the major controlling factor in pedogenesis and subsequent soil physical and chemical properties in Antarctica should be better understood to improve soil mapping and interpretations. The present study aims to analyze the soil properties of different lithological groups on the President Head Peninsula on Snow Island, Maritime Antarctica. Thirty soil profiles across the major lithological groupings on Snow Island (beach deposits, andesites, basalts/andesites, conglomerate, sandstones, siltstones, and mudstones) were described, and the morphological, physical, and chemical properties of samples from sampled genetic horizons were characterized. Beach deposits were most clearly differentiated from other lithological groups, whereas most other groups overlapped strongly in observed properties. Whereas some lithological groups (e.g., sedimentary rock groups) were characterized largely by immature soils with little degree of pedogenesis, other sampled soils exhibited more development. The soil–parent material relationships of Snow Island revealed a unique setting of a complex heterogeneous landscape and show that the area has a great pedological complexity induced by phosphatization, melanization, and cryoturbation processes that preclude placing primary importance on parent material and lithology as the major controlling factor in Antarctic soils.
岩性对土壤特性的控制,南极大陆雪岛
由于土壤发育程度有限,土壤母质是南极地区土壤特性的关键控制因素。然而,土壤母质在多大程度上可被视为南极地区成土过程及其后土壤物理和化学性质的主要控制因素,这一点应得到更好的理解,以改进土壤制图和解释工作。本研究旨在分析南极大陆雪岛总统头半岛上不同岩性组的土壤特性。研究描述了雪岛主要岩性组群(海滩沉积、安山岩、玄武岩/安山岩、砾岩、砂岩、粉砂岩和泥岩)的 30 个土壤剖面,并对取样遗传地层样品的形态、物理和化学特性进行了描述。海滩沉积物与其他岩性组的区别最为明显,而其他大多数岩性组在观测特性上有很大的重叠。有些岩性组(如沉积岩组)的土壤基本不成熟,几乎没有成土过程,而其他取样土壤则表现出更多的成土过程。雪岛的土壤与母质的关系揭示了复杂的异质地貌的独特环境,并表明该地区在磷化、黑化和冷冻扰动过程的作用下形成了非常复杂的土壤学。
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来源期刊
CiteScore
9.70
自引率
8.00%
发文量
43
审稿时长
>12 weeks
期刊介绍: Permafrost and Periglacial Processes is an international journal dedicated to the rapid publication of scientific and technical papers concerned with earth surface cryogenic processes, landforms and sediments present in a variety of (Sub) Arctic, Antarctic and High Mountain environments. It provides an efficient vehicle of communication amongst those with an interest in the cold, non-glacial geosciences. The focus is on (1) original research based on geomorphological, hydrological, sedimentological, geotechnical and engineering aspects of these areas and (2) original research carried out upon relict features where the objective has been to reconstruct the nature of the processes and/or palaeoenvironments which gave rise to these features, as opposed to purely stratigraphical considerations. The journal also publishes short communications, reviews, discussions and book reviews. The high scientific standard, interdisciplinary character and worldwide representation of PPP are maintained by regional editorial support and a rigorous refereeing system.
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