Spreading structure of the Troodos ophiolite, Cyprus

Abstract

Research Article| December 01, 1985 Spreading structure of the Troodos ophiolite, Cyprus Robert J. Varga; Robert J. Varga 1Union Oil Research Center, Box 76, Brea, California 85721 Search for other works by this author on: GSW Google Scholar Eldridge M. Moores Eldridge M. Moores 2Department of Geology, University of California, Davis, California 95616 Search for other works by this author on: GSW Google Scholar Geology (1985) 13 (12): 846–850. https://doi.org/10.1130/0091-7613(1985)13<846:SSOTTO>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 Robert J. Varga, Eldridge M. Moores; Spreading structure of the Troodos ophiolite, Cyprus. Geology 1985;; 13 (12): 846–850. doi: https://doi.org/10.1130/0091-7613(1985)13<846:SSOTTO>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 SocietyGeology Search Advanced Search Abstract Orientations of dikes within the sheeted dike complex of the Troodos ophiolite reveal primary spreading structure produced at a complex ridge/transform intersection. Three structural grabens are defined by listric and planar normal faults and rotated dikes that dip symmetrically toward graben axes. Faults flatten at depth into a detachment within the upper parts of the plutonic complex. Large exhalative massive sulfide deposits occur within the pillow sections of two of the grabens and appear to be associated with underlying altered and mineralized normal fault zones that channeled hydrothermal fluids. We suggest that the grabens are fossil axial valleys produced by successive eastward jumps of an approximately north-trending (present coordinates), slow-spreading ridge crest. A simple model for ridge migration indicates eastward jumps of 8–13 km; changes in ridge orientation are suggested by changes in trends of dikes and graben axes. Comparison of the pattern of dikes near the Arakapas fault zone with the structure of active ridge/transform intersections suggests that the fault is a right-offset (sinistral) transform, in contrast to earlier models in which a ridge to the west of the exposed Troodos complex was proposed. 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.