干旱区生态环境知识资源中心(Arid): Weathering of gneiss saprolites and formation of Planosols under semiarid climate (NE Brazil)

Arid

DOI	10.1016/j.jsames.2023.104206
	Weathering of gneiss saprolites and formation of Planosols under semiarid climate (NE Brazil)
	Neves, Laercio Vieira de Melo Wanderley; de Sousa, Juliet Emilia Santos; Santos, Jean Cheyson Barros dos; de Araujo Filho, Jose Coelho; Correa, Marcelo Metri; Sousa, Marilya Gabryella; Fracetto, Felipe Jose Cury; Fracetto, Giselle Gomes Monteiro; Araujo, Jane Kelly Silva; Freire, Gabriel Araujo Paes; Ferreira, Tiago Osorio; de Souza Junior, Valdomiro Severino
通讯作者	de Souza, VS
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2023
卷号	123
英文摘要	The Brazilian semiarid is one of the most populous regions in the world. The main income for populations in this region is agricultural production, which in turn is limited by climatic and soil conditions. This region has environmental and economic correlations with underdeveloped regions in northwestern Africa, displaying soil surface with monotonous landscapes of smooth undulating relief with large extensions of Planosols. Climatic conditions that lead to the formation of poorly developed soils and to losses of surface layers make these soils susceptible to degradation. In the Brazilian semiarid, lithology shows that felsic rocks are the main factor in pedogenesis of Planosols, conferring the main physical, chemical, and mineralogical attributes to the soil. In this study, we evaluated the pedogenesis by weathering of gneisses (felsic rocks) in two profiles of Planosols in the Cabrob ' o Desertification Nucleus, Pernambuco State, northeast Brazil, highlighting the role of the parent material in the soil intrinsic characteristics in the pedogenetic processes. The primary assemblage and pedological features were determined by optical microscopy in thin sections of the A, B, and C horizons from the two soil profiles. The secondary assemblage was identified by X-ray diffractometry using the technique: SEM-scanning electron mi-croscopy. Clay formation in situ, colluvial contribution, and elutriation process contributed to the formation of the gradient textural in both Planosols, with no evidence of argilluviation. For total regolith profile, acidic metamorphic rocks present high structural variability directly influencing the evolution of saprolites, the alteration of primary minerals, and the formation routes of secondary minerals. The secondary assemblage was rather similar and comprised illite, smectite, and kaolinite in both regoliths. The saprolite inclination in P1 favors water movement in relation to P2. The regolith in P1 shows greater mineral alteration with increased pedogenic development.
英文关键词	Regolith profile K-feldspars Plagioclase Illite
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000926739800001
WOS关键词	ORGANIC-CARBON ; SOIL FORMATION ; CLAY-MINERALS ; MASS-BALANCE ; EROSION ; GENESIS ; FE ; FRACTIONATION ; TOPOSEQUENCE ; FERROLYSIS
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/2XILL650/397574
推荐引用方式 GB/T 7714	Neves, Laercio Vieira de Melo Wanderley,de Sousa, Juliet Emilia Santos,Santos, Jean Cheyson Barros dos,et al. Weathering of gneiss saprolites and formation of Planosols under semiarid climate (NE Brazil)[J],2023,123.
APA	Neves, Laercio Vieira de Melo Wanderley.,de Sousa, Juliet Emilia Santos.,Santos, Jean Cheyson Barros dos.,de Araujo Filho, Jose Coelho.,Correa, Marcelo Metri.,...&de Souza Junior, Valdomiro Severino.(2023).Weathering of gneiss saprolites and formation of Planosols under semiarid climate (NE Brazil).JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,123.
MLA	Neves, Laercio Vieira de Melo Wanderley,et al."Weathering of gneiss saprolites and formation of Planosols under semiarid climate (NE Brazil)".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 123(2023).