干旱区生态环境知识资源中心(Arid): Late Pleistocene alluvial fan evolution along the coastal Atacama Desert (N Chile)

Arid

DOI	10.1016/j.gloplacha.2019.103091
	Late Pleistocene alluvial fan evolution along the coastal Atacama Desert (N Chile)
	Bartz, Melanie; Walk, Janek; Binnie, Steven A.; Brill, Dominik; Stauch, Georg; Lehmkuhl, Frank; Hoffmeister, Dirk; Brueckner, Helmut
通讯作者	Bartz, M
来源期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
EISSN	1872-6364
出版年	2020
卷号	190
英文摘要	Due to their sensitivity to both tectonic activity and climatic variations, coastal alluvial fans (CAF) along the western flank of the Coastal Cordillera in the Atacama Desert (northern Chile) are important geo-archives for unravelling Quaternary environmental change. Our study focuses on terrestrial and marine deposits of five CAF complexes between 20 degrees and 25 degrees S along the coastal zone of the Atacama to identify phases of alluvial fan activity during the Late Quaternary. Based on a combination of luminescence dating and Be-10 cosmogenic nuclide exposure dating as well as existing chronological data in the area, insights into climatic variations along the hyperarid coast are presented for the Late Pleistocene derived from CAF morphodynamics. Activity of alluvial fans could be documented during time spans 95-80 ka, 60-45 ka, 35-20 ka, as well as the Holocene. Numerical dating of marine terrace deposits gives insights into the tectonic uplift of the Coastal Plain in northern Chile during the Late Quaternary period, for which estimated uplift rates between similar to 0.06 and similar to 0.57 m/ka were derived. While tectonic activity induces base-level changes, long-term tectonic activity rather indirectly controls alluvial fan activity. We suggest that alluvial fan activity is mainly controlled by atmospheric changes from the Pacific Ocean. Based on our observations, CAF in the hyper-arid Atacama Desert serve as suitable geo-archives for reconstructing climate changes during the Quaternary. In particular, the usefulness of alluvial fan systems in a water-limited environment is important for understanding the palaeoenvironmental evolution in a coastal desert.
英文关键词	Atacama Desert Luminescence dating Cosmogenic nuclide dating Alluvial fans Marine terraces Palaeoclimate Tectonic uplift
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000536927700001
WOS关键词	SEA-LEVEL CHANGES ; SALAR-DE-ATACAMA ; NORTHERN CHILE ; BE-10 CONCENTRATIONS ; HYDROLOGIC VARIATION ; SOUTHERN WESTERLIES ; LUMINESCENCE AGES ; COSMOGENIC BE-10 ; MARINE TERRACES ; CENTRAL ANDES
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324588
作者单位	[Bartz, Melanie; Brill, Dominik; Hoffmeister, Dirk; Brueckner, Helmut] Univ Cologne, Inst Geog, D-50674 Cologne, Germany; [Walk, Janek; Stauch, Georg; Lehmkuhl, Frank] Rhein Westfal TH Aachen, Dept Geog, D-52056 Aachen, Germany; [Binnie, Steven A.] Univ Cologne, Inst Geol, D-50674 Cologne, Germany
推荐引用方式 GB/T 7714	Bartz, Melanie,Walk, Janek,Binnie, Steven A.,et al. Late Pleistocene alluvial fan evolution along the coastal Atacama Desert (N Chile)[J],2020,190.
APA	Bartz, Melanie.,Walk, Janek.,Binnie, Steven A..,Brill, Dominik.,Stauch, Georg.,...&Brueckner, Helmut.(2020).Late Pleistocene alluvial fan evolution along the coastal Atacama Desert (N Chile).GLOBAL AND PLANETARY CHANGE,190.
MLA	Bartz, Melanie,et al."Late Pleistocene alluvial fan evolution along the coastal Atacama Desert (N Chile)".GLOBAL AND PLANETARY CHANGE 190(2020).