Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1016/j.precamres.2021.106216 |
| A Mesoproterozoic hybrid dry-wet aeolian system: Galho do Miguel Formation, SE Brazil | |
| Basilici, Giorgio; Mesquita, Aquila Ferreira; Theodoro Soares, Marcus Vinicius; Janocko, Juraj; Mountney, Nigel Philip; Colombera, Luca | |
| 通讯作者 | Basilici, G (corresponding author), Univ Estadual Campinas, Inst Geosci, Dept Geol & Nat Resources, BR-13083870 Campinas, SP, Brazil. |
| 来源期刊 | PRECAMBRIAN RESEARCH
 |
| ISSN | 0301-9268 |
| EISSN | 1872-7433 |
| 出版年 | 2021 |
| 卷号 | 359 |
| 英文摘要 | Based on Phanerozoic and present-day cases, aeolian systems are categorised into dry, wet and stabilising types. It is questioned here whether these models are applicable to Proterozoic systems when environmental conditions on the Earth's surface were markedly different. Facies and architectural-element analyses have been applied to the Mesoproterozoic aeolian succession of the Galho do Miguel Formation, SE Brazil. The aim is to identify and discuss what controlling factors govern the construction and preservation of Proterozoic aeolian systems, and to explain how these differ from Phanerozoic models. In the metaquartzarenites of the Galho do Miguel Formation four aeolian subenvironments - megadunes (draas), large-scale isolated dunes with dry interdunes, small-scale isolated dunes with damp or wet interdunes and salt flats - coexisted and alternated temporally and spatially. The construction of megadunes, large-scale dunes and dry interdunes occurred in topographically elevated areas, usually above the water table, but that were occasionally flooded; isolated dunes with damp and wet interdunes, and salt flats formed in low-lying areas with water table at or close to the surface. A long-lived sediment supply combined with ongoing tectonic subsidence enabled the accumulation of a thick aeolian succession (1000-1500 m) that covered a large area (4000 km(2)). The water table controlled the accumulation of this unit. Where it was close to the accumulation surface, it acted to limit the availability of the windblown sand, hampering the construction of large and compound bedforms and allowing the deposition of damp and wet interdunes and salt flats as a wet aeolian system. Where large and compound bedforms with dry interdunes developed as a dry aeolian system, slow but progressive subsidence-driven water-table rise provided accumulation space that enabled system preservation. The Galho do Miguel Formation constitutes a hybrid aeolian system, in which both dry and wet environmental conditions were coeval. In the Mesoproterozoic, the absence of rooted-vegetation capable of acting as a sand stabilising agent allowed the widespread generation of aeolian systems in humid as well as arid environments. In humid environmental settings, water played a significant role in the accumulation and preservation of aeolian deposits, preventing their reworking by the wind or other exogenous agents. |
| 英文关键词 | Dry eolian system Wet eolian systems Water table Erg Espinhaco Supergroup |
| 类型 | Article |
| 语种 | 英语 |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000652106800026 |
| WOS关键词 | STRATIGRAPHIC EVOLUTION ; BOUNDING SURFACES ; ESPINHACO BASIN ; SEDIMENTARY SUCCESSION ; SEQUENCE STRATIGRAPHY ; INTERDUNE DEPOSITS ; DUNE FIELD ; SAND SEA ; SANDSTONE ; RECONSTRUCTION |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS研究方向 | Geology |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/368670 |
| 作者单位 | [Basilici, Giorgio; Mesquita, Aquila Ferreira; Theodoro Soares, Marcus Vinicius] Univ Estadual Campinas, Inst Geosci, Dept Geol & Nat Resources, BR-13083870 Campinas, SP, Brazil; [Basilici, Giorgio] La Rioja CONICET, Ctr Reg Invest Cient & Transferencia Tecnol, Buenos Aires, DF, Argentina; [Janocko, Juraj] Tech Univ Kosice, Fac BERG, Inst Geosci, Letna 9, Kosice 04011, Slovakia; [Mountney, Nigel Philip; Colombera, Luca] Univ Leeds, Sch Earth & Environm, Fluvial & Eolian Res Grp, Leeds LS2 9JT, W Yorkshire, England |
| 推荐引用方式 GB/T 7714 | Basilici, Giorgio,Mesquita, Aquila Ferreira,Theodoro Soares, Marcus Vinicius,et al. A Mesoproterozoic hybrid dry-wet aeolian system: Galho do Miguel Formation, SE Brazil[J],2021,359. |
| APA | Basilici, Giorgio,Mesquita, Aquila Ferreira,Theodoro Soares, Marcus Vinicius,Janocko, Juraj,Mountney, Nigel Philip,&Colombera, Luca.(2021).A Mesoproterozoic hybrid dry-wet aeolian system: Galho do Miguel Formation, SE Brazil.PRECAMBRIAN RESEARCH,359. |
| MLA | Basilici, Giorgio,et al."A Mesoproterozoic hybrid dry-wet aeolian system: Galho do Miguel Formation, SE Brazil".PRECAMBRIAN RESEARCH 359(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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