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| DOI | 10.1016/j.tecto.2020.228590 |
| The Iglesia basin in the southern Central Andes: A record of backarc extension before wedge-top deposition in a foreland basin | |
| Gonzalez M.; Clavel F.; Christiansen R.; Gianni G.M.; Lince Klinger F.; Martinez P.; Butler K.; Suriano J.; Mardonez D.; Díaz M. | |
| 发表日期 | 2020 |
| ISSN | 00401951 |
| 卷号 | 792 |
| 英文摘要 | The Iglesia basin hosts a key sedimentary archive of the evolution of the southern Central Andes. This basin is classically interpreted as recording the transition from an outer- to an inner-wedge-top (piggyback basin) depozone in the early Bermejo foreland basin system. In this study, we reevaluate the tectonic evolution of the Iglesia basin based on the interpretation of 2D seismic reflection data, structural geology, zircon U[sbnd]Pb geochronology, and provenance analysis. We report an extensional event that initiated the basin opening. Our results indicate normal faulting development and synextensional deposition from the latest Oligocene (?)-earliest Miocene to middle Miocene. Since the middle Miocene, extensional activity experienced a progressive decrease in changing to shortening and basin inversion between the middle-late Miocene. The latter stage coincided with the full development of Pampean flat-slab subduction indicating maximum plate coupling at that time. Our findings challenge the idea of uninterrupted Paleogene to Neogene flexural subsidence related to the Andean orogenic-load in the backarc area. Therefore, the results of this study have important consequences for the early evolution of the Bermejo foreland basin and ultimately, for the growth of the southern Central Andes. © 2020 Elsevier B.V. |
| 关键词 | Backarc extensional basinForeland basinSynextensional wedgesWedge-top depozone |
| 英文关键词 | Deposition; Faulting; Geochronology; Silicate minerals; Zircon; Back-arc extensions; Basin inversions; Flat-slab subductions; Latest Oligocene; Middle Miocene; Normal faulting; Provenance analysis; Tectonic evolution; Structural geology; backarc basin; data interpretation; depocenter; extensional tectonics; foreland basin; geochronology; Miocene; normal fault; piggyback basin; plate motion; provenance; seismic reflection; tectonic evolution; two-dimensional modeling; uranium-lead dating; Andes |
| 语种 | 英语 |
| 来源期刊 | Tectonophysics
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/207761 |
| 作者单位 | CONICET, Instituto Geofísico y Sismológico Ingeniero Volponi, Universidad Nacional de San Juan, Ruta 12, Km 17, San Juan, CP 5407, Argentina; Instituto de Estudios Andinos Don Pablo Groeber, UBA-CONICET, Departamento de Ciencias Geológicas, FCEN, Universidad de Buenos Aires, Argentina; Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; IANIGLA, CCT Mendoza, CONICET, Parque San Martín s/n, Mendoza, 5500, Argentina; Departamento de Geología, Facultad de Ciencias Exactas Físicas y Naturales, Universidad Nacional de San Juan, Argentina |
| 推荐引用方式 GB/T 7714 | Gonzalez M.,Clavel F.,Christiansen R.,et al. The Iglesia basin in the southern Central Andes: A record of backarc extension before wedge-top deposition in a foreland basin[J],2020,792. |
| APA | Gonzalez M..,Clavel F..,Christiansen R..,Gianni G.M..,Lince Klinger F..,...&Díaz M..(2020).The Iglesia basin in the southern Central Andes: A record of backarc extension before wedge-top deposition in a foreland basin.Tectonophysics,792. |
| MLA | Gonzalez M.,et al."The Iglesia basin in the southern Central Andes: A record of backarc extension before wedge-top deposition in a foreland basin".Tectonophysics 792(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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