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GEOREF RECORD

Computer models of carbonate platform cycles driven by subsidence and eustasy

Ronald J. Spencer and Robert V. Demicco
Computer models of carbonate platform cycles driven by subsidence and eustasy
Geology (Boulder) (February 1989) 17 (2): 165-168

Abstract

Six computer simulations of cycles developed on carbonate platforms were generated using MAPS, a BASIC program. Four simulations employed a flat platform and sinusoidal sea-level oscillations with heights ranging from 0.02 to 20 m, but a constant 25 ka period superimposed over a constant relative sea-level rise of 0.05 m/ka. The lower height oscillations might reasonably model variable subsidence rates, whereas the higher oscillations model glacioeustatic sea-level changes. Metre-thick cycles were generated in all cases.Two simulations involved variations in periods of sinusoidal sea-level variations and subsidence rates on a tilting platform. The thicknesses of cycles generated are a function of both period of sea-level oscillation and subsidence rate. In geologic applications, either the period of sea-level oscillations or the subsidence rate needs to be known to determine the other. We suggest that two end-member models need to be considered for interpreting carbonate platform cycles: (1) constant subsidence with variable sea level; (2) constant sea level with variable subsidence. Combinations of these two end members are likely.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 17
Serial Issue: 2
Title: Computer models of carbonate platform cycles driven by subsidence and eustasy
Affiliation: Univ. Calgary, Dep. Geol. and Geophys., Calgary, AB, Canada
Pages: 165-168
Published: 198902
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 19
Accession Number: 1989-026866
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: 1 table, sects.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1989
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