Sequence stratigraphy of the Precambrian |
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| Institution: | 1. Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, Alberta, Canada T6G 2E3;2. Department of Geology, University of Pretoria, Pretoria 0002, South Africa;1. Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, South Africa;2. Iziko Museums of South Africa, Cape Town, South Africa;1. Department of Geoscience, University of Wisconsin-Madison, WI 53706, United States of America;2. Department of Earth and Planetary Sciences, Northwestern University, IL 60208, United States of America;1. Guangdong Provincial Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou 510372, PR China;2. Key Lab of Submarine Geosciences and Prospecting Techniques, MOE, Institute for Advanced Ocean Study, College of Marine Geosciences, Ocean University of China, Qingdao 266100, PR China;3. Laboratories for Marine Mineral Resources and Marine Geology, National Laboratory for Marine Science and Technology, Qingdao 266237, PR China;1. School of Earth Science and Resources, Chang''an University, Xi''an, 710054, China;2. The Key Laboratory of Western Mineral Resources and Geological Engineering, Ministry of Education, Chang''an University, Xi''an, 710054, China;3. Changqing Oil Company Branch, CNPC, Xi''an, 710018, China;4. College of Geology and Environment, Xi''an University of Science and Technology, Xi''an, 710054, China;1. Geological Studies Unit, Indian Statistical Institute, Kolkata 700108, India;2. Geological Survey of India, State Unit: Chhattisgarh, Raipur, India |
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| Abstract: | The method of sequence stratigraphy requires the application of the same workflow and principles irrespective of the age of strata under analysis. In that respect, its application to Precambrian successions is similar to the approach used for Phanerozoic case studies. Differences, however, are recorded in terms of the preservation potential and the amount of data available for analysis; the rates and intensities of the allogenic controls on sedimentation; the environmental conditions and related physical processes; and the evolution of competing groups of organisms and associated biogenic processes. The combined effect of these contrasting aspects accounts for differences in the architecture of depositional sequences, particularly with respect to the relative contributions of various systems tracts to the makeup of a sequence.The application of sequence stratigraphy to Precambrian basins has considerably enlarged the perspective on the fundamental principles governing the processes of sedimentary basin formation and the mechanisms controlling stratigraphic cyclicity in the rock record. These first-order principles are perhaps the most important contribution of Precambrian research to sequence stratigraphy. At the broader scale of Earth's geological history, the tectonic regimes governing the formation and evolution of sedimentary basins are shown to have been much more erratic in terms of nature and rates than originally inferred solely from the study of the Phanerozoic record. This provides important clues with respect to the criteria that should be involved in the hierarchy system of classification of stratigraphic sequences and bounding surfaces. |
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