Mamonia Complex, southwest Cyprus: Evolution and emplacement of a Mesozoic continental marginстатья из журнала
Аннотация: Research Article| July 01, 1979 Mamonia Complex, southwest Cyprus: Evolution and emplacement of a Mesozoic continental margin A.H.F. ROBERTSON; A.H.F. ROBERTSON 1Grant Institute of Geology, West Mains Road, Edinburgh EH9 3JW, United Kingdom Search for other works by this author on: GSW Google Scholar N. H. WOODCOCK N. H. WOODCOCK 2Department of Geology, Downing Street, Cambridge CB2 3EQ, United Kingdom Search for other works by this author on: GSW Google Scholar Author and Article Information A.H.F. ROBERTSON 1Grant Institute of Geology, West Mains Road, Edinburgh EH9 3JW, United Kingdom N. H. WOODCOCK 2Department of Geology, Downing Street, Cambridge CB2 3EQ, United Kingdom Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1979) 90 (7): 651–665. https://doi.org/10.1130/0016-7606(1979)90<651:MCSCEA>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation A.H.F. ROBERTSON, N. H. WOODCOCK; Mamonia Complex, southwest Cyprus: Evolution and emplacement of a Mesozoic continental margin. GSA Bulletin 1979;; 90 (7): 651–665. doi: https://doi.org/10.1130/0016-7606(1979)90<651:MCSCEA>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Mamonia Complex in southwest Cyprus comprises an assemblage of Upper Triassic to Lower Cretaceous sedimentary rocks, Upper Triassic mafic igneous rocks, and subordinate metamorphic rocks, which together lie adjacent to the southwest margin of the Troodos ophiolitic complex and its Upper Cretaceous sedimentary cover.The sedimentary facies of the Mamonia Complex record the progressive development of a Mesozoic passive continental margin. Initial crustal subsidence associated with deltaic and turbiditic terrigenous clastic sedimentation was followed by continental rifting and then the genesis of marginal oceanic crust in Late Triassic time. Subsequent pelagic and hemipelagic deposition during Jurassic and Early Cretaceous time reflects passive continental margin subsidence. Shallow-water calcareous material derived from an adjacent carbonate platform, probably now located in southern Turkey, was deposited on the margin by gravity flows. After initial rifting, coarse terrigenous clastic input was minimal until a major influx of terrigenous material in Early Cretaceous time, possibly contemporaneous with an episode of renewed ocean-floor spreading in the area. Allowing for the 90° Tertiary rotation of Cyprus, the Mamonia rocks formed part of the northern margin of a small ocean basin during Jurassic and Cretaceous time. The Troodos Complex is likely to represent a younger surviving fragment of the same basin. By Late Cretaceous time, ocean-floor spreading had ended, followed in the Maastrichtian by disruption, folding, and emplacement of the Mamonia sedimentary sequences onto the Troodos ophiolitic rocks. The Mamonia sedimentary rocks are now arranged in subhorizontal sheets which, on the basis of fold vergence and facing directions, were emplaced toward the present northeast – that is, prior to paleorotation, toward the original southeast. The displaced sheets probably represent down-margin gravity slides. The evidence is compatible with both the Mamonia and Troodos Complexes having a local ("external") origin in contrast to the currently favored "internalist" hypothesis involving long-distance transport. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Год издания: 1979
Авторы: Alastair H.F. Robertson, Nigel Woodcock
Издательство: Geological Society of America
Источник: Geological Society of America Bulletin
Ключевые слова: Geological and Geophysical Studies Worldwide, Geological and Geochemical Analysis, Paleontology and Evolutionary Biology
Открытый доступ: closed
Том: 90
Выпуск: 7
Страницы: 651–651