Download or read book High resolution Sequence Stratigraphy in a Mesoproterozoic Intracratonic Sag Basin the Tombador Formation Chapada Diamantina Basin Brazil written by Antonio J. C. Magalhães and published by . This book was released on 2015 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies applying sequence stratigraphy to the Precambrian sedimentary record have been limited and have focused on low-resolution applications due to problems in preservation, deformation/metamorphism, and diagenesis. However, higher-resolution studies are possible where geometry, facies definition, and facies relationships are well-definable, such as that presented by the Mesoproterozoic Tombador Formation in the Chapada Diamantina (diamond-bearing plateau) Basin. Despite its very old age, this unit underwent localized very low-grade metamorphism, and the exposure and preservation are exceptional, affording a unique opportunity to observe changes at the sub-seismic scale (high-resolution sequence stratigraphy). Furthermore, this unit enables researchers to unravel the processes that dominated the deposition and understand their stratigraphic evolution, as few such pristine data sets are available anywhere in the world for that time interval. The data for this study were collected from several sources, including detailed and regional seismic-scale photo-mosaics; 1869.8 m of vertical section with a detailed facies description at a 1:40 scale; 697 paleocurrent readings; 1870 m of gamma ray (GR) logs with a 20-cm space sample; a 6.2-km ground penetrating radar (GPR) survey; and the description of 106 thin sections. The vertical description of the facies and stratigraphic sections, calibrated with the GR logs, the photo-mosaics, the GPR survey, and the petrography of sandstones allowed for the interpretation of the depositional systems, the identification of key stratigraphic surfaces, and the external geometry of the sequences. Higher-rank depositional sequence boundaries are placed at the base of the extensive amalgamated fluvial sand sheets or at the base of the alluvial fan conglomeratic successions that indicate basinward shifts of facies. The hierarchy system that applies to the Tombador Formation includes sequences of different orders, which are defined as follows: sequences associated with a particular tectonic setting are designated as 'first order' and are separated by first-order sequence boundaries where changes in the tectonic setting are recorded; second-order sequences represent the major subdivisions of a first-order sequence and reflect change cycles in the stratal stacking pattern observed at 1E2 m scale (i.e., 200-300 m); changes in the stratal stacking pattern at 1E1 m scale indicate third-order sequences (i.e., 40-70 m); and changes in the stratal stacking pattern at 1E0 m scale are assigned to the fourth order (i.e., 8-12 m). Changes in paleogeography due to relative sea level changes are recorded at all hierarchical levels with a magnitude that increases with the hierarchical rank. Thus, the Tombador Formation corresponds to one first-order sequence, representing a distinct sag basin fill in the polycyclic history of the Espinhaço Supergroup in Chapada Diamantina. An angular unconformity separates the fluvial-estuarine to the alluvial fan deposits and marks the second-order boundary. Below the angular unconformity, third-order sequences register deposition of unincised fluvial and tide-dominated estuarine systems and exhibit a lowstand fluvial sand sheet, an undifferentiated transgressive-highstand sand-rich floodplain, a transgressive estuarine, and highstand shoreface strata. In contrast, the third-order sequences above the angular unconformity are characterized by fining-upward continental alluvial successions composed of conglomerates overlain by fluvial and eolian strata; however, the data are inconclusive regarding whether these successions were downstream or upstream controlled. Hence, no systems tract nomenclature was used. Fourth-order sequences are clearly recognized at the third-order transgressive systems tract, and they exhibit distinct facies associations depending on their occurrence at the estuarine or fluvial domains. At the estuarine domain, they are composed of tidal channel, tidal bar and overlying shoreface heterolithic strata. At the fluvial domain, there are two types of fourth-order sequences: a) those preserved at the sand-rich floodplain, which are composed of cyclic successions of sand-bed braided or distal ephemeral sheetflood deposits capped by eolian sand sheet or mudstone layers, and b) those preserved at the tide-influenced braided fluvial sand sheet, which consist of cyclic successions of fluvial strata bounded by tide-influenced intervals. Fine grained intervals from shoreface heterolithic and sand-rich floodplain deposits constitute fourth-order sequence boundaries that at the reservoir approach, constitute the most important horizontal heterogeneity and hence the preferable boundaries of production zones. The criteria applied to assign sequence hierarchies in the Tombador Formation are based on rock attributes, are easy to apply, and can be used as a baseline for the study of sequence stratigraphy in Precambrian and Phanerozoic basins placed in similar tectonic settings.
Download or read book High Resolution Sequence Stratigraphy written by John A. Howell and published by Geological Society of America. This book was released on 1996 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Sequence Stratigraphy and Seismic Stratigraphy of the Leonardian Bone Spring Formation Delaware Basin Southeast New Mexico written by Tyler Bickley and published by . This book was released on 2019 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sequence Stratigraphy of the Mid continent written by Norman J. Hyne and published by . This book was released on 1995 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High resolution sequence stratigraphy of the Leonardian Lower Clear Fork Group in the Permian Basin West Texas written by Eduardo Efren Ariza and published by . This book was released on 1998 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphic Studies in Southwestern Montana and Adjacent Idaho lower Tertiary Anaconda Conglomerate and Mesoproterozoic Gunsight Formation written by and published by . This book was released on 2005 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sequence Stratigraphy of Foreland Basin Deposits written by J. C. Van Wagoner and published by Aapg. This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This memoir, which grew out of an Exxon-led, AAPG-sponsored field trip, discusses concepts and applications of sequence stratigraphy. Following a description and historical perspective of the terminology used, 14 papers discuss topics such as models for topset play types; the sequence stratigraphic significance of trace fossils; lateral variability in the Campanian and lower Maastrichtian of the western interior seaway; facies architecture of parasequences; controls on sequence stacking; stratigraphy of Turonian-Santonian strata; sequence, parasequence, and intraparasequence architecture of the grassy member; and high-frequency sequence stratigraphy and paleogeography of the Kenilworth member. The papers are accompanied by excellent fold-out photos and diagrams--in bandw and color. Annotation copyright by Book News, Inc., Portland, OR
Download or read book Facies Analysis and High Resolution Sequence Stratigraphy of the Lower Cretaceous Fall River Formation Red Canyon South Dakota and Buck Draw Field NE Wyoming written by Ida Njoman Widya Dharmasamadhi and published by . This book was released on 1995 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Siliciclastic Sequence Stratigraphy written by Paul Weimer and published by . This book was released on 1994 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This memoir grew out of the 2 1/2-day symposium, 'Variations in Depositional Systems Within a Sequence Stratigraphic Framework: Applications to Exploration,' that we organized at the 1991 AAPG annual meeting in Dallas, Texas."--Preface.
Download or read book Applied Stratigraphy written by Eduardo A.M. Koutsoukos and published by Springer Science & Business Media. This book was released on 2005-03-14 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stratigraphy has come to be indispensable to nearly all branches of the earth sciences, assisting such endeavors as charting the course of evolution, understanding ancient ecosystems, and furnishing data pivotal to finding strategic mineral resources. This book focuses on traditional and innovative stratigraphy techniques and how these can be used to reconstruct the geological history of sedimentary basins and in solving manifold geological problems and phenomena.
Download or read book Depositional History and High Resolution Sequence Stratigraphy of the Leonardian Bone Spring Formation Northern Delaware Basin Eddy and Lea Counties New Mexico written by Charles Braddock Crosby and published by . This book was released on 2015 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Sequence Stratigraphy of Late Mississippian Carbonates in the Appalachian Basin written by Aus Al-Tawil and published by . This book was released on 1998 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Integrated Vail Galloway Sequence written by Cyril S. Frazier and published by . This book was released on 2019 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Sequence Stratigraphy of the Upper Carboniferous Basin fill Succession Co Clare Western Ireland written by Trevor Elliott and published by . This book was released on 1994 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Carbonate Sequence Stratigraphy written by and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field based Tesing of High Resolution Sequence Stratigraphic Concepts written by Roy J. Fitzsimmons and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chapada Diamantina Sao Francisco Basin written by and published by . This book was released on 1994 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
