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Tectonic Controls on Miocene Reefs and Related Carbonate Facies in Cyprus

By
Edward J. Follows
Edward J. Follows
1
UEDN/711, Shell UK Expro, 1 Alten's Farm Road, Aberdeen, AB9 2HY, United Kingdom
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Alastair H. F. Robertson
Alastair H. F. Robertson
1
UEDN/711, Shell UK Expro, 1 Alten's Farm Road, Aberdeen, AB9 2HY, United Kingdom
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Terence P. Scoffin
Terence P. Scoffin
2
Department of Geology and Geophysics, Grant Institute, West Mains Road, Edinburgh EH9 3JW, United Kingdom
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Published:
January 01, 1996

Abstract:

Reefs of Early Miocene (Aquitanian/Burdigalian) and Late Miocene (Tortonian) age are exposed in Cyprus, mainly around the periphery of the Troodos ophiolitic massif. Reef growth followed early Tertiary deep-water sedimentation and localized tectonic uplift. The Aquitanian/Burdigalian Terra Member formed on isolated, stable basement highs in southeast and west Cyprus. Up to 500 m- by 80 m-sized, faunally diverse patch reefs grew in relatively shallow, calm seas. Fore-reef and basinal facies are exposed in western Cyprus. Reefs of the Tortonian Koronia Member reflect local tectonic settings. Those in southern Cyprus developed on linear highs, related to earlier crustal compression. These reefs are preserved almost entirely as channelised talus in adjacent basins. Around the western and, particularly the northern margins of the Troodos ophiolite, reef growth was influenced by active crustal extension. Patch reefs in the north formed on uplifting fault blocks and large volumes of talus were shed down steep slopes into basins to the north. In west Cyprus, the reefs grew on both flanks of a gradually subsiding graben, with local preservation of back-reef facies. The Late Miocene reefs were dominated by Porites, first largely domal, then mainly as sheet-like encrustations. Growth of both the Early and Late Miocene reefs was preceded by erosion and was then followed by transgression, associated with a relative sea-level rise. Reef growth was finally brought to an end by Messinian desiccation of the Mediterranean. The reefs were cemented by Mg - calcite and botryoidal aragonite during and shortly after growth. Subsequently, during exposure to meteoric and brackish waters, the fabric of the reef was modified by dissolution, neomorphism, calcite spar and locally gypsum cementation. Uplift and extensional faulting caused fracturing of the, by then, brittle reefs (Terra Member) and fissures were locally enlarged by karst-forming solutions. A marine transgression in the ensuing Early Pliocene time then filled the fissures with fine-grained carbonate sediments, which were prone to mixing-zone dolomitization.

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Contents

SEPM Concepts in Sedimentology and Paleontology

Models for Carbonate Stratigraphy from Miocene Reef Complexes of Mediterranean Regions

Evan K. Franseen
Evan K. Franseen
Kansas Geological Survey, University of Kansas, Lawrence, Kansas
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Mateu Esteban
Mateu Esteban
Carbonates International Ltd, Esporles, Mallorca, Spain
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William C. Ward
William C. Ward
Department of Geology and Geophysics, University of New Orleans, Louisiana
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Jean-Marie Rouchy
Jean-Marie Rouchy
Laboratoire de Geologie, Museum National D'Histoire Naturelle, Paris, France
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SEPM Society for Sedimentary Geology
Volume
5
ISBN electronic:
9781565762282
Publication date:
January 01, 1996

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