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TitleCyprus crustal study project: initial report, holes CY-2 and 2a
AuthorRobinson, P T (ed.); Gibson, I L (ed.); Panayiotou, A (ed.)
SourceGeological Survey of Canada, Paper 85-29, 1987, 381 pages (1 sheet), (Open Access)
Mediapaper; on-line; digital
RelatedThis publication contains Dawson, K R; (1974). Mineral deposits map : niobium and tantalum in Canada, Geological Survey of Canada, "A" Series Map no. 1354A
File formatpdf
Subjectsigneous and metamorphic petrology; geochemistry; geophysics; economic geology; metallic minerals; lithology; mineralization; mineral deposits; geophysical surveys; geophysical interpretations; metallogeny; alteration; aquifers; geochemical analyses; ophiolites; hydrothermal alteration; sulphides; isotopes; volcanic rocks; igneous rocks; petrographic analyses; paleomagnetism; seismic surveys; gravity surveys; magnetic surveys
Released1988 03 01; 2014 10 06
AbstractTwo holes were drilled in the Agrokipia ore deposits of the Troodos ophiolite in order to investigate the nature of hydrothermal circulation and ore formation in oceanic crust. Hole CY-2 penetrated 226 m beneath the Agrokipia 'A' deposit with 92% recovery. lt sampled 100 m of hydrothermally altered lavas before passing into relatively fresh, glassy rocks. Hole CY-2a, located directly above the Agrokipia 'B' deposit, penetrated 154 m of weakly altered lavas, 143 m of hydrothermally altered and mineralized rock, and 392 m of highly altered dykes and pillow screens. Recovery in CY-2a averaged about 93%, being lowest in the hydrothermally altered section. Of the 97 days spent at these two sites, only 60 were actually used in drilling operations, giving an average penetration rate of just over 15 m per day. The recovered core was washed, fitted together and described on site. Units were defined on the basis of cooling breaks and changes in grain size, lithology, mineralogy or degree of alteration. One hundred and nine units were recognized in hole CY-2 and 373 in hole CY-2a. These units were grouped into larger scale lithologic units for comparison with exposed sequences. The core is stored in Nicosia, Cyprus and may be sampled upon application to the Chairman of the International Crustal Research Drilling Group. Use of the core for further study is encouraged.