干旱区生态环境知识资源中心(Arid): U-PB ages and environmental evolution of the De La Cuesta Formation (late Paleozoic): Record of the Choiyoi Volcanism in the retroarc area of the Paganzo Basin, Western Gondwana

Arid

DOI	10.1016/j.jsames.2021.103531
	U-PB ages and environmental evolution of the De La Cuesta Formation (late Paleozoic): Record of the Choiyoi Volcanism in the retroarc area of the Paganzo Basin, Western Gondwana
	Limarino, Carlos O.; Ciccioli, Patricia L.; Marenssi, Sergio; Cesari, Silvia N.; Friedman, Richard
通讯作者	Limarino, CO (corresponding author), Univ Buenos Aires, CONICET, Inst Geociencias Basicas Aplicadas & Ambientales, Buenos Aires, DF, Argentina.
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2021
卷号	112
英文摘要	This paper examines the relationship between the sedimentation in the retroarc Paganzo Basin and the activity of the magmatic arc developed in the neighboring Andean Cordillera during the Late Pennsylvanian-Cisuralian. The temporal relationships between the Choiyoi Volcanism (Andean region) and the retroarc Paganzo Basin were investigated according to three lines of research: 1. Sedimentology and lithostratigraphy of the De La Cuesta Formation, 2. Geochronology and, 3. Biostratigraphy. Paleoenvironmental studies indicate that small alluvial fans (facies association A) and braided river (facies association B) deposits prevailed in the lower third of the De La Cuesta Formation, which includes a thin intercalation of shallow marine sediments only present in the western part of the area (facies association C). A progressive decrease in the energy of the fluvial systems occurred at the middle part of the unit, where dominant finning-upward successions correspond to meandering rivers (facies association D). In contrast, interbedded sandstones and mudstones were subsequently deposited by low-energy ephemeral rivers (facies association E). Finally, the upper third of the De La Cuesta Formation corresponds to eolian sandstones (facies association F) and shallow water bodies deposits, including evaporites, limestones, and tuffs (facies association G) sedimented under semiarid to arid conditions with periods of explosive volcanism. A U-Pb age of 278.84 Ma was obtained from a tuff level at the uppermost part of the De La Cuesta Formation (facies association G). This age, together with one previously obtained of 311.89 +/- 0.21 Ma corresponding to the base of the unit, indicate that the De La Cuesta Formation is Moscovian-Kungurian in age and that it was mostly deposited before the main phase of the Choiyoi magmatism, synchronically with the so-called Pre-Choiyoi magmatism. Furthermore, a rich palynological assemblage belonging to the Lueckisporites/Weylandites Biozone (LW), recovered from deposits of the facies association G, is equivalent to the Lueckisporites virkkiae (Lv) Biozone from the Paran ' a Basin (Brazil), pointing out a Kungurian age for these biostratigraphic units. The new radiometric age and the palynological taxa recovered from the top of the De La Cuesta Formation (facies association G) confirm a Kungurian age for this interval, establishing a key level for correlation between the sedimentation in the retroarc with the onset of the Choiyoi Volcanism in the magmatic arc.
英文关键词	Permian Choiyoi U Pb age Sedimentology Palynology
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000701772300001
WOS关键词	ASH FALL DEPOSITS ; PARANA BASIN ; ARGENTINA IMPLICATIONS ; SOUTHWESTERN MARGIN ; TRIASSIC MAGMATISM ; SAN-JUAN ; GEOCHRONOLOGY ; PRECISION ; CORDILLERA ; PALYNOLOGY
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/2XILL650/364035
作者单位	[Limarino, Carlos O.; Ciccioli, Patricia L.; Marenssi, Sergio] Univ Buenos Aires, CONICET, Inst Geociencias Basicas Aplicadas & Ambientales, Buenos Aires, DF, Argentina; [Cesari, Silvia N.] Museo Argentino Ciencias Nat Bernardino Rivadavia, CONICET, Av Angel Gallardo 470, Buenos Aires, DF, Argentina; [Friedman, Richard] Univ British Columbia, Pacific Ctr Isotop & Geochem Res, EOS Main Bldg 6339,Stores Rd, Vancouver, BC, Canada
推荐引用方式 GB/T 7714	Limarino, Carlos O.,Ciccioli, Patricia L.,Marenssi, Sergio,et al. U-PB ages and environmental evolution of the De La Cuesta Formation (late Paleozoic): Record of the Choiyoi Volcanism in the retroarc area of the Paganzo Basin, Western Gondwana[J],2021,112.
APA	Limarino, Carlos O.,Ciccioli, Patricia L.,Marenssi, Sergio,Cesari, Silvia N.,&Friedman, Richard.(2021).U-PB ages and environmental evolution of the De La Cuesta Formation (late Paleozoic): Record of the Choiyoi Volcanism in the retroarc area of the Paganzo Basin, Western Gondwana.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,112.
MLA	Limarino, Carlos O.,et al."U-PB ages and environmental evolution of the De La Cuesta Formation (late Paleozoic): Record of the Choiyoi Volcanism in the retroarc area of the Paganzo Basin, Western Gondwana".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 112(2021).