气候变化领域集成服务门户(CCPortal): Holocene sedimentary processes in the Turbio river valley (Chile, 30°S): Paleoclimatic implications for the semi-arid Andes

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DOI	10.1016/j.jsames.2024.104888
	Holocene sedimentary processes in the Turbio river valley (Chile, 30°S): Paleoclimatic implications for the semi-arid Andes
	Juan, M. San; Villasenor, T.; Flores-Aqueveque, V.; Honores, E.; Moreiras, S.; Antinao, J. L.; Maldonado, A.
发表日期	2024
ISSN	0895-9811
EISSN	1873-0647
起始页码	139
卷号	139
英文摘要	The Holocene sedimentary history of the Turbio River valley in semi -arid north -central Chile and its relationship to climate variability is presented in this study. Fluvial landforms and sedimentary deposits serve as essential records for studying the long-term dynamics of fluvial systems in response to external factors such as tectonic and climatic influences. The study area, located in the Andean Mountain range, is highly sensitive to hydrodynamic changes and sediment transport processes, making it suitable for studying fluvial dynamics and their relationship to climate fluctuations over millennia. In particular, the transitional semi -arid conditions of this region provide an opportunity to link Holocene fluvial sediments to climatic shifts. This study presents the analysis of wellpreserved sedimentary deposits that outcrop along the valley walls, including grain -size distribution, stratigraphy, geochemical composition and radiocarbon dating to establish the chronological context. Facies association analysis, along with geochemical data, allowed the interpretation of depositional sub -environments and their evolution through time. We interpret the Holocene sedimentary evolution for the Turbio River valley as six time periods that reflect shifts in sediment source, energy regime, flow types, and sedimentary processes linked to fluctuations between wet and dry climatic conditions. The sedimentary sequence is interpreted as reflecting an initial high-energy period with continuous surface runoff followed by two periods of formation of extensive lakes, likely separated by periods of runoff intensification. The later part of the sequence reflects a more stable fluvial landscape that led to the excavation of the sedimentary fill. This sedimentary record provides valuable insights into past climate variations and their impact on the hydrodynamic conditions of the fluvial system in the region. Comparisons with other regional records support a broader understanding of climate change in the semiarid Andes of Chile.
英文关键词	Holocene climate; Semiarid Andes; Rio Turbio valley; Lacustrine sedimentary environment; Fluvial sedimentation
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001228546100001
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302640
作者单位	Universidad de Chile; Universidad de O'Higgins; Universidad Catolica del Norte; University Nacional Cuyo Mendoza; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); University Nacional Cuyo Mendoza; Indiana University System; Indiana University Bloomington
推荐引用方式 GB/T 7714	Juan, M. San,Villasenor, T.,Flores-Aqueveque, V.,et al. Holocene sedimentary processes in the Turbio river valley (Chile, 30°S): Paleoclimatic implications for the semi-arid Andes[J],2024,139.
APA	Juan, M. San.,Villasenor, T..,Flores-Aqueveque, V..,Honores, E..,Moreiras, S..,...&Maldonado, A..(2024).Holocene sedimentary processes in the Turbio river valley (Chile, 30°S): Paleoclimatic implications for the semi-arid Andes.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,139.
MLA	Juan, M. San,et al."Holocene sedimentary processes in the Turbio river valley (Chile, 30°S): Paleoclimatic implications for the semi-arid Andes".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 139(2024).