干旱区生态环境知识资源中心(Arid): Morphotectonic and Gravimetric Analysis of the La Burra Valley, Central Precordillera, San Juan, Argentina

Arid

DOI	10.1007/978-3-030-22621-3_4
	Morphotectonic and Gravimetric Analysis of the La Burra Valley, Central Precordillera, San Juan, Argentina
	Perucca, L. P.; Rothis, L. M.; Alcacer, J.; Vargas, N.; Lara, G.; Audemard, F. A.; Bezerra, F. H.; Vasconcelos, D. L.
通讯作者	Perucca, LP (corresponding author), Univ Nacl San Juan, Fac Ciencias Exactas Fis & Nat, Gabinete Neotecton & Geomorfol, INGEO Dept GEOLOGIA, Av Ignacio La Roza & Meglioli, RA-5400 San Juan, Argentina. ; Perucca, LP (corresponding author), Consejo Nacl Invest Cient & Tecn, CIGEOBIO, San Juan, Argentina.
会议名称	Symposium of the Argentine-Association-of-Geomorphology-and-Quaternary-Studies (AACYG) on Geomorphology, Quaternary and Climatic Change Studies
会议日期	OCT, 2017
会议地点	Tucuman, ARGENTINA
英文摘要	This work describes new evidence of Quaternary tectonic activity in the La Burra intermountain valley in the Central Precordillera, San Juan Province, Argentina. Quaternary structures are located in the eastern piedmont of the Sierra de la Crucecita, and western piedmont of the sierra de Talacasto (30 degrees 54'-31 degrees S and 68 degrees 47'-68 degrees 55' W), about 70 km northwest of the city of San Juan. By means of morphotectonic analysis, the main deformation features have been identified and located in both piedmonts, named from north to south: Las Crucecitas and Vertientes faults (in the eastern piedmont of the Sierra de La Crucecita) and the Western Talacasto fault system (in the western piedmont of the homonymous range). The faults affect alluvial deposits from Late Pleistocene to Holocene ages. They are defined by a series of features, typical of compressive environments such as: slope scarps (eastern piedmont of the Sierra de La Crucecita) and counter-slope scarps (western piedmont of the Sierra de Talacasto), fluvial strath terraces restricted to the hanging block of faults, sagponds, aligned springs, diverted and obstructed drainage, deeply incised and sinuous streams in the hanging blocks, alluvial fans with anomalous slopes, among other features that evidence their Quaternary activity. Six Quaternary alluvial levels were identified, from the most recent Q(1) to the oldest Q(6), according to their relative elevation, presence or absence of desert varnish and pavement and degree of incision. The faults affect Q(6) to Q(2) alluvial levels in coincidence with the east-verging thin-skinned structural style typical of the Central Precordillera. This deformation is related to the regional tectonics that have been active in the Precordillera area. Besides, the main geological structures were identified by the analysis and interpretation of gravimetric anomalies, employing data obtained from WGM12 (World Gravity Map 2012), which includes earth and satellite gravity data derived from the EGM2008 model. The gravimetrical response of the crustal blocks that compose the area under study, shows a correlation with the most superficial crustal structure and could be associated to the different morphotectonic domains recognized in the region.
英文关键词	Morphotectonics Faults Gravimetry Analytical signal Precordillera Andean ranges San Juan Argentina
来源出版物	ADVANCES IN GEOMORPHOLOGY AND QUATERNARY STUDIES IN ARGENTINA
ISSN	2197-9596
EISSN	2197-960X
出版年	2020
页码	92-113
ISBN	978-3-030-22621-3; 978-3-030-22620-6
EISBN	978-3-030-22621-3
出版者	SPRINGER INTERNATIONAL PUBLISHING AG
类型	Proceedings Paper
语种	英语
国家	Argentina;Venezuela;Brazil
收录类别	CPCI-S
WOS记录号	WOS:000518789800004
WOS关键词	SOUTHERN CENTRAL ANDES ; THRUST BELT ; PROVINCE ; SYSTEM
WOS类目	Geology
WOS研究方向	Geology
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/313846
作者单位	[Perucca, L. P.; Rothis, L. M.; Alcacer, J.; Vargas, N.; Lara, G.] Univ Nacl San Juan, Fac Ciencias Exactas Fis & Nat, Gabinete Neotecton & Geomorfol, INGEO Dept GEOLOGIA, Av Ignacio La Roza & Meglioli, RA-5400 San Juan, Argentina; [Perucca, L. P.; Rothis, L. M.; Alcacer, J.] Consejo Nacl Invest Cient & Tecn, CIGEOBIO, San Juan, Argentina; [Audemard, F. A.] FUNVISIS, Venezuelan Fdn Seismol Res, Funvisis Earth Sci Dept, Caracas, Venezuela; [Bezerra, F. H.; Vasconcelos, D. L.] Univ Fed Rio Grande Norte UFRN, Dept Geol, Campus Univ, BR-59072970 Natal, RN, Brazil
推荐引用方式 GB/T 7714	Perucca, L. P.,Rothis, L. M.,Alcacer, J.,et al. Morphotectonic and Gravimetric Analysis of the La Burra Valley, Central Precordillera, San Juan, Argentina[C]:SPRINGER INTERNATIONAL PUBLISHING AG,2020:92-113.