Combined stratigraphic and isotopic studies of Triassic strata, Cuyo Basin, Argentine Precordillera
51
Citation
28
Reference
10
Related Paper
Citation Trend
Abstract:
Research Article| September 01, 2006 Combined stratigraphic and isotopic studies of Triassic strata, Cuyo Basin, Argentine Precordillera J. N. Ávila; J. N. Ávila 1Laboratório de Geologia Isotópica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501–970, Brazil Search for other works by this author on: GSW Google Scholar F. Chemale, Jr.; F. Chemale, Jr. 1Laboratório de Geologia Isotópica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501–970, Brazil Search for other works by this author on: GSW Google Scholar G. Mallmann; G. Mallmann 1Laboratório de Geologia Isotópica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501–970, Brazil Search for other works by this author on: GSW Google Scholar K. Kawashita; K. Kawashita 1Laboratório de Geologia Isotópica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501–970, Brazil Search for other works by this author on: GSW Google Scholar R. A. Armstrong R. A. Armstrong 2Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information J. N. Ávila 1Laboratório de Geologia Isotópica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501–970, Brazil F. Chemale, Jr. 1Laboratório de Geologia Isotópica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501–970, Brazil G. Mallmann 1Laboratório de Geologia Isotópica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501–970, Brazil K. Kawashita 1Laboratório de Geologia Isotópica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501–970, Brazil R. A. Armstrong 2Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia Publisher: Geological Society of America Received: 30 Aug 2005 Revision Received: 13 Feb 2006 Accepted: 03 Mar 2006 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2006) 118 (9-10): 1088–1098. https://doi.org/10.1130/B25893.1 Article history Received: 30 Aug 2005 Revision Received: 13 Feb 2006 Accepted: 03 Mar 2006 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation J. N. Ávila, F. Chemale, G. Mallmann, K. Kawashita, R. A. Armstrong; Combined stratigraphic and isotopic studies of Triassic strata, Cuyo Basin, Argentine Precordillera. GSA Bulletin 2006;; 118 (9-10): 1088–1098. doi: https://doi.org/10.1130/B25893.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The evolution of the Triassic–Cretaceous Cuyo Basin, located in the Andean Precordillera (NW Argentina), was mainly controlled by extensional–transtensional tectonics along NW-trending structures inherited from Paleozoic sutures. Stratigraphic and isotopic studies are herein presented in order to constrain the sedimentary infilling and source areas, as well as the age of Triassic strata related to the active faulted margin of the Cacheuta sub-basin. The whole stratigraphic package of the Cuyo Basin is interpreted as a second-order depositional sequence, comprising lowstand (alluvial fan deposits), transgressive (fluvial-deltaic and lacustrine deposits), and high-stand (oxidized lacustrine and high-sinuosity fluvial deposits) systems tracts. This stacking pattern was mainly controlled by the interplay between sedimentary influx and accommodation space, with important volcaniclastic contribution, especially during the early stages of basin development. Sm-Nd depleted-mantle model ages (TDM) for both basement and volcano-sedimentary samples range from 867 to 1345 Ma. All samples have negative ϵNd (t) values (−0.33 to −5.02). Basal deposits present older TDM model ages compared to intermediate-positioned deposits, and upper deposits present a wider range of model ages. This time-integrated factor correlates with paleo-current data, which indicate changes in the source areas through time. The Nd isotopic signature also suggests that sources of sediments for the Cacheuta sub-basin during the Triassic were restricted to units of Mesoproterozoic (Grenvillian) age, probably related to the Cuyania terrane. The U-Pb sensitive high-resolution ion microprobe (SHRIMP) zircon age of 243 ± 5 Ma, obtained in juvenile magmatic zircons from a lithoclast-free ignimbrite interlayered within the basal alluvial fan facies of the Cacheuta sub-basin, places the lowstand deposits in the Olenekian and establishes a potential chronostratigraphic horizon for future correlations. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.Keywords:
Pica (typography)
Cite
Onlap
Lithology
Cite
Citations (30)
Lineation
Cite
Citations (50)
The Middle Magdalena Valley, Eastern Cordillera, and Llanos basin constituted a major regional sedimentary basin from the Triassic to the middle Miocene. Basin development began during the Triassic to the earliest Cretaceous with a synrift megasequence related to the separation of North and South America in the proto-Caribbean. The synrift megasequence began with deposition in a continental environment that became paralic and shallow marine in the Early Cretaceous. Basin development continued into the Cretaceous in a back-arc setting east of the Andean subduction zone. The back-arc megasequence was dominated by shallow-marine sedimentation and produced an excellent regional source rock during the Turonian-Coniacian. Marine deposition was abruptly terminated during the ear y Maastrichtian due to the final accretion of the Western Cordillera. Accretion of the Western Cordillera created the early pre-Andean foreland basin megasequence of late Maastrichtian to early Eocene age. This depositional episode consists of coal-rich alluvial plain, coastal plain, and estuarine deposits throughout the Middle Magdalena Valley, Eastern Cordillera, and eastern Llanos basin. The megasequence was terminated by middle Eocene deformation in the Magdalena Valley, which ended sediment deposition throughout Colombia. Loading effects of this deformation reestablished the basin, in which the late pre-Andean foreland basin megasequence was deposited, until the early Miocene. This megasequence also consists of alluvial plain, coastal plain, and estuarine deposits, including the primary reservoir in the Llanos Foothills--the upper Eocene Mirador Fo mation. The megasequence also includes a series of four major grossly coarsening-upward cycles in the Llanos basin; these cycles correspond to changes in sea level, sediment supply, and foreland basin loading. The mudstone in the lowermost of these cycles is the regional seal in the Llanos basin and Foothills. The middle Miocene onset of Andean deformation in the Eastern Cordillera isolated the Middle Magdalena Valley from the Llanos basin. The deformation was dominated by inversion of the basin-controlling faults; the resultant loading of the lithosphere created the accommodation space for the Andean foreland basin megasequence. A major transgression into the Llanos basin coeval with this deformation caused deposition of marine mudstones in the lower part of the megasequence. However, the majority of the Andean foreland basin megasequence consists of the Guayabo Formation, a classic molasse sequence, deposited in a high-energy, coarse-grained, bed-load-dominated fluvial system that was supplied by the developing mountains of the Eastern Cordillera.
Cite
Citations (378)
Jinzh ou basin is a small NE-trending Late Triassic-Middle Jurassic continental basin in the south segment of Xuefeng orogen.Previous researchers held that the basin is a pull-apart extensional basin related to dextral strike-slipping of NNE-trending Xupu-Jinzhou fault.The authors studied the tectonic characteristics,sedimentary features and proto-basin of Late Triassic-Middle Jurassic Jinzhou basin and,on such a basis,brought forward the opinion that the basin is a compressional quasi-foreland basin according to evidence as follows : ① High maturity of the deposits and the harmony of the basin boundary with surrounding older geological boundary indicates that the basin is a compressional low depression.② High component maturity and far-resource features of the deposits suggest that the basin was formed in a stable tectonic setting.③ The sedimentary space of Upper Triassic-Lower Jurassic strata in the northern basin was formed from rocks bending.The attitude changes of rocks indicate that the basin was NW-compressed and folded in Middle Jurassic.Sedimentary features show that there existed shallow-and deep-water environment in the west and the east of the basin,respectively,which implies that the basin was controlled by gravity load of east peripheral thrust block.④ In adjacent areas of the basin,there occur a few extensional faults and a lot of small strike-slip faults,thrust faults and conjugated shear joints related to the compression.⑤ According to the strike deflexion of the fault,Jinzhou basin was situated in a compressional area instead of an extensional area when Xupu-Jinzhou fault experienced dextral strike-slipping action.Based on the sedimentary and tectonic characteristics of Jinzhou basin and the regional tectonic setting,the authors hold that the basin was related mainly to regional S-N-compression during Late Triassic-Early Jurassic period,and related to NWW-compression and NNE-trending dextral strike-slipping during Middle Jurassic period.
Pull apart basin
Back-stripping
Thrust fault
Cite
Citations (0)
Tectonic forcing of stratigraphic architecture is likely in foreland basins. Tectonic driving forces are increasingly being invoked to explain stratigraphic patterns in the Cretaceous Western Interior Seaway Basin of North America, yet the evidence is largely circumstantial, and the details of driving forces remain elusive. In this paper I show direct stratigraphic evidence for syndepositional growth of a structural arch with at least 50 m of relief during accumulation of the upper Turonian Ferron Sandstone in south-central Utah, United States. Progressive growth of the arch was superimposed on several high-frequency stratal cycles that were driven by a more regionally extensive process (geodynamic or eustatic) and that produced laterally amalgamated sandstone bodies in a depositional strike-parallel orientation (north-south). All of this stratigraphy was then truncated by a more or less planar erosion surface (sequence boundary) that can be traced physically over at least 67 km north-south. This surface was later tilted northward, such that the upper member of the Ferron Sandstone thins progressively southward from 50 to 10 m over 67 km. The facies juxtapositions revealed by the Ferron Sandstone could, if seen in exposure of limited lateral extent, be wrongly interpreted as recording regionally extensive relative sea-level drops and potentially used in error as evidence for substantial eustatic sea-level falls during the Turonian. The folding and tilting documented in this study can be clearly attributed to geodynamic and/or tectonic driving forces, likely related to migration of a forebulge.
Cite
Citations (33)
Jurassic is the main source rocks of Qaidam Basin,distributed mainly in the northern margin of the basin.Based on the comprehensive studies of marker beds,lithological features and sedimentary characteristics,the alluvial fan facies,braided river facies,fan delta facies,braided river delta facies and lacustrine facies are distinguished in Jurassic deposits in the main sections exposed.Both the facies belt distribution and paleogeographic evolution are closely related to the regional tectonic movement.There are two evolution stages that include the faulted lake basin sedimentary stage from Early to Middle Jurassic and the depression lake basin sedimentary stage during Late Jurassic,according to the stratigraphic contact relations and sedimentary evolution.
Alluvial fan
Cite
Citations (3)
Dead sea
Cite
Citations (5)