干旱区生态环境知识资源中心(Arid): Exhumation and structural evolution of the high-elevation Malcante Range, Eastern Cordillera, NW Argentina

Arid

DOI	10.1016/j.jsames.2020.102990
	Exhumation and structural evolution of the high-elevation Malcante Range, Eastern Cordillera, NW Argentina
	Payrola, Patricio; Zapata, Sebastian; Sobel, Edward R.; del Papa, Cecilia; Pingel, Heiko; Glodny, Johannes; Ledesma, Jonathan
通讯作者	Payrola, P (corresponding author), Univ Nacl Salta, CONICET, Inst Bio & Geociencias NOA IBIGEO, Av Bolivia 5150, RA-4400 Salta, Argentina.
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2021
卷号	105
英文摘要	As an integral part of the Eastern Cordillera, the fault-bounded Malcante mountain range (up to 5100 m) in the NW Argentine Andes (ca. 25 degrees S) is located in the transition between the arid Puna Plateau to the west and the humid broken foreland to the east. At this latitude, the topographic gradient of the eastern Andean margin forms an efficient orographic barrier that causes pronounced east-west rainfall and surface-process gradients. In this setting, the Malcante Range is an important, yet poorly studied structural high formed during the Cenozoic topographic growth of the Central Andes. In this study, we combine (a) detailed field observations, (b) a two-dimensional structural reconstruction, (c) apatite fission track and (U-Th-Sm)/He thermochronology of bedrock samples from a vertical transect across the western flank of the Malcante Range, and (d) inverse thermal modelling using QTQt software with the aim of deciphering the exhumation history of this mountain range. Field data indicate the presence of an angular unconformity between Cenozoic foreland deposits and older sedimentary strata, suggesting an initial episode of deformation during the middle-late Eocene, while our thermal model constrains the onset of exhumation at similar to 10 Ma. We suggest that exhumation was related to the unroofing of the easily erodible sedimentary cover, which prevented significant initial surface uplift. This may have changed as more resilient bedrock was exposed at 5 Ma according to the thermal model, promoting rapid rock uplift. In combination with published data, our thermochronology allows us to speculate on the existence of a zone of deformation concentrated in the area of the present-day Pasha (24.5 degrees S), Malcante (25 degrees S), and Agua de Castilla (25.4 degrees S) mountain ranges by ca. 10 Ma.
英文关键词	Thermochronology Apatite fission track Apatite (U-Th)/He Mountain building Eastern cordillera NW Argentina
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000606803300001
WOS关键词	MIDDLE EOCENE DEFORMATION ; TRACK ANNEALING KINETICS ; APATITE (U-TH)/HE ; NORTHWESTERN ARGENTINA ; ANGASTACO BASIN ; THRUST BELTS ; UPLIFT ; SEDIMENTATION ; VARIABILITY ; TECTONICS
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/2XILL650/348041
作者单位	[Payrola, Patricio] Univ Nacl Salta, CONICET, Inst Bio & Geociencias NOA IBIGEO, Av Bolivia 5150, RA-4400 Salta, Argentina; [del Papa, Cecilia; Ledesma, Jonathan] Univ Nacl Cordoba, CONICET, CICTERRA FCEFyN, Av Velez Sarsfield,1611,X5016GCA, Cordoba, Argentina; [Sobel, Edward R.; Pingel, Heiko] Univ Potsdam, Inst Geowissensch, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany; [Zapata, Sebastian] Smithsonian Trop Res Inst, POB 0843-03092, Balboa, Ancon, Panama; [Zapata, Sebastian] Missouri Univ Sci & Technol, Dept Geosci & Geol & Petr Engn, Rolla, MO 65409 USA; [Glodny, Johannes] Deutsch GeoForschungsZentrum GFZ, Telegrafenberg, Helmholtz Zentrum Potsdam, D-14473 Potsdam, Germany
推荐引用方式 GB/T 7714	Payrola, Patricio,Zapata, Sebastian,Sobel, Edward R.,et al. Exhumation and structural evolution of the high-elevation Malcante Range, Eastern Cordillera, NW Argentina[J],2021,105.
APA	Payrola, Patricio.,Zapata, Sebastian.,Sobel, Edward R..,del Papa, Cecilia.,Pingel, Heiko.,...&Ledesma, Jonathan.(2021).Exhumation and structural evolution of the high-elevation Malcante Range, Eastern Cordillera, NW Argentina.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,105.
MLA	Payrola, Patricio,et al."Exhumation and structural evolution of the high-elevation Malcante Range, Eastern Cordillera, NW Argentina".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 105(2021).