Sequence Stratigraphy and Sedimentology of a Mixed Clastic-carbonate Shelf System, Cretaceous Napo Formation, Oriente Basin, Ecuador PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Sequence Stratigraphy and Sedimentology of a Mixed Clastic-carbonate Shelf System, Cretaceous Napo Formation, Oriente Basin, Ecuador PDF full book. Access full book title Sequence Stratigraphy and Sedimentology of a Mixed Clastic-carbonate Shelf System, Cretaceous Napo Formation, Oriente Basin, Ecuador by Victoria A. Hunter. Download full books in PDF and EPUB format.
Author: Victoria A. Hunter
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 410
Get Book Here
Book Description
Author: Victoria A. Hunter
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 410
Get Book Here
Book Description
Author: Nadir Taskin Akpulat
Publisher:
ISBN:
Category :
Languages : en
Pages : 782
Get Book Here
Book Description
Author: Debra K. Higley
Publisher: DIANE Publishing
ISBN: 1428984453
Category : Geology, Stratigraphic
Languages : en
Pages : 30
Get Book Here
Book Description
Author: Evelin Gabriela Gutierrez Tamayo
Publisher:
ISBN:
Category :
Languages : en
Pages : 268
Get Book Here
Book Description
The evolution of sediment source regions in the Andes of Ecuador can be linked to Late Cretaceous-Cenozoic development of a subduction-related magmatic arc, retroarc fold-thrust belt, and flexural foreland basin. An assessment of the chronostratigraphic, provenance, and depositional characteristics of 3.5 km thick clastic succession accompanied by seismic structural analysis of uplifted basement-rooted structuress in the Subandean and Oriente foreland basin provide insights into important Cretaceous and Cenozoic shifts in the paleogeographic framework and tectonic evolution of the Ecuadorian Andes. Detrital zircon U-Pb geochronological results for 17 sandstone samples (1845 individual ages) provide an integrated provenance framework for sedimentary fill of the Oriente Basin. The U-Pb results span six stratigraphic levels that range in age from the late Early Cretaceous (Hollín Formation) to Quaternary (Mesa and Mera Formations). Contributing source regions can be identified by diagnostic age populations representative of four principal tectonic provinces: (1) Western Cordillera magmatic arc (100 Ma); (2) Eastern Cordillera basement (1300-250 Ma), Triassic intrusions (250-200 Ma) and Early and limited Late Cretaceous igneous rocks (145-66 Ma); (3) Subandean Zone fold-thrust belt (200-145 Ma ages accompanied by recycled signatures from Cretaceous strata); and (4) eastern cratonic regions of the Amazonian shield (1300 Ma). U-Pb geochronological results for the uppermost Cretaceous Tena Formation, including a young population of 68.6 ± 3.5 Ma (n=3 grains), indicate a wholesale reversal from eastern cratonic sediment sources to early Andean sources that can be assigned to a Maastrichtian onset of shortening. The U-Pb results also reveal existence of previously undocumented andean basement sources of Pan-African age (900-650 Ma) and Late Cretaceous magmatic arc (89.8-68 Ma) signatures. Upsection shifts in representative U-Pb age spectra demonstrate the systematic introduction of new source regions as well as progressive recycling (cannibalization) of older basin fill. The recycled basin fill was incorporated into younger foreland deposits during eastward advance of the Andean fold-thrust belt. Such interactions were also recorded by thickness variations within the Paleocene-Eocene reflector package and reactivation of preexisting (inherited) normal faults that were identified using seismic structural analysis. This structural disruption was linked to uplift of basement-rooted blocks in the westernmost basin margin, causing the lack of westward thickening of the basin succession toward the Andean mountain belt
Author: Fabio Cediel
Publisher: Springer
ISBN: 3319761323
Category : Science
Languages : en
Pages : 1010
Get Book Here
Book Description
This book provides a comprehensive overview of the geological evolution of the Northern Andes and contiguous shield areas, with a focus upon Colombia. Updated geological interpretations are supported by modern lithogeochemical, seismic, gravity and magnetic data and radiogenic isotope and radiometric age determinations. The composite data permits a detailed interpretation of the tectono-magmatic history of the Northern Andean Block, including the Andes of Colombia, northern Ecuador, western Venezuela and eastern Panamá. Tectonic reconstructions based upon characterization of more than thirty litho-tectonic and morpho-structural units, terrane assemblages and tectonic realms, and their bounding suture and fault systems, highlight the intimate and complementary Mesozoic-Cenozoic history of the Northern Andean Block and the Pacific and Caribbean Plates. The complex nature of Northern Andean assembly contrasts with ‘‘classical’’ Central Andean ‘‘Cordilleran-type’’ orogenic models. Differences render the application of typical Cordilleran-type models inappropriate for the Colombian Andes. The importance of underlying Proterozoic through mid-Mesozoic elements, in the development of Meso-Cenozoic Northern Andean orogeny-phase tectonic configurations is analyzed in the light of spatial-temporal studies and reconstructions related to basin formation, sedimentation, deformation, uplift mechanisms, structural style and magmatic evolution. The pre-Andean architecture of north western South America has played a pre-determinative role in the development of the Northern Andean orogenic system. 16 contributions analyze key stratigraphic, structural, metamorphic, magmatic and tectonic questions, and provide solutions as far as the most recent published field-based studies permit. The volume provides geological interpretations and tectonic models which contrast with repetitive theoretical proposals frequently found in the available literature.
Author: Nadir Taskin Akpulat
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Noel P. James
Publisher: Springer Nature
ISBN: 3030639827
Category : Science
Languages : en
Pages : 240
Get Book Here
Book Description
This book documents and interprets the onshore Cenozoic temperate carbonate depositional system along the southern margin of Australia. These strata, deposited in four separate basins, together with the extensive modern marine system offshore, comprise the largest such cool-water carbonate system on the globe. The approach is classic and comparative but the information is a synthesis of recent research and new information. A brief section of introduction outlines the setting, modern comparative sedimentology offshore, and structure of the Cenozoic onshore. The core of the book is a detailed analysis and illustration of the four Eocene to Pleistocene successions. Deposits range from temperate carbonates, to biosiliceous spiculites, to marginal marine siliciclastics. Each unit is interpreted, as much as possible, based on our understanding of the modern offshore depositional system. A subsequent part concentrates on diagenesis both before and after the late Miocene uplift. It turns out that alteration in the two packages is entirely different. The preceding attributes of each succession are then interpreted on the basis of controlling factors such as tectonics, oceanography, climate, and glaciation of nearby Antarctica. This research has revealed new implications for the interpretation of specific attributes of cool-water carbonate sedimentology that could only be discovered from the rock record. Insights concerning cyclicity, reef mounds, biosiliceous deposition, and trophic resources are detailed in the next section. The concluding part focuses on global comparisons, especially the Mediterranean and New Zealand.
Author: Alexander Stoyanow
Publisher: Geological Society of America
ISBN: 0813710383
Category : Geology
Languages : en
Pages : 205
Get Book Here
Book Description
Author: Tor Helge Nilsen
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 100
Get Book Here
Book Description
A stratigraphic division of the Hornbrook Formation into five nonmarine and marine members.
Author: Michael O. Woodburne
Publisher: Geological Society of America
ISBN: 0813721628
Category : Geology
Languages : en
Pages : 112
Get Book Here
Book Description
