The cassiterite-anatase-ilmenite-monazite-sulphide-chlorite assemblage of North Tincroft Lode

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The cassiterite-anatase-ilmenite-monazite-sulphide-chlorite assemblage of North Tincroft Lode

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dc.contributor.author LeBoutillier, N.G. en_US
dc.contributor.author Shail, R.K. en_US
dc.contributor.author Jewson, C. en_US
dc.date.accessioned 2011-12-19T17:00:31Z en_US
dc.date.accessioned 2012-09-28T18:17:05Z en_US
dc.date.accessioned 2013-03-20T12:58:29Z
dc.date.issued 2000-01 en_US
dc.description.abstract North Tincroft Lode (New Cook's Kitchen Mine) forms a segment of an ENE-WSW-striking lode structure that can be traced for similar to2 km along strike and similar to800 m vertically through the Camborne-Redruth mining district, Lode samples from previously undescribed shallow workings between deep and shallow adit levels (similar to28-45 m below surface) have been analysed by optical microscopy, SEM and XRD, and reveal a complex polymetallic mineralogy, Cassiterite, arsenopyrite, chalcopyrite and sphalerite galena inclusions) occur in a dense, non-brecciated, chlorite fluorite quartz matrix and are accompanied by significant monazite, anatase and ilmenite. All phases are fine-grained (< 200 gm diameter) and the paragenetic relationships suggest rapid, telescoped, infilling of the lode by cassiterite, monazite and ilmenite, in a matrix of sulphides and chlorite. Vugs within the matrix contain euhedral single crystals, twins and intergrowths of anatase and monazite, with less common cassiterite, chalcocite, chalcopyrite, bornite, cuprite, ilmenite, goethite. langite, brochantite, marcasite, arsenopyrite, pyrrhotite, sphalerite and apatite. The North Tincroft Lode, with its cassiterite-sulphide-chlorite assemblage, is faulted by Pryce's Lode at the 175 fathom level (similar to320 metres below surface). The mixing between magmatic-hydrothermal and meteoric fluids previously inferred to generate such assemblages must therefore have occurred early in the mineralisation history and was possibly coeval with development of cassiterite-tourmaline assemblages at depth. en_US
dc.identifier.citation Vol. 10, pp. 50 - 57 en_US
dc.identifier.uri http://hdl.handle.net/10036/3799 en_US
dc.publisher USSHER SOC en_US
dc.relation.url http://www.ussher.org.uk/ en_US
dc.subject SOUTHWEST ENGLAND en_US
dc.subject CORNUBIAN BATHOLITH en_US
dc.subject VARISCAN STRUCTURES en_US
dc.subject MINERALIZATION en_US
dc.subject CORNWALL en_US
dc.subject COAST en_US
dc.subject FIELD en_US
dc.title The cassiterite-anatase-ilmenite-monazite-sulphide-chlorite assemblage of North Tincroft Lode en_US
dc.date.available 2011-12-19T17:00:31Z en_US
dc.date.available 2012-09-28T18:17:05Z en_US
dc.date.available 2013-03-20T12:58:29Z
dc.contributor.editor Williams, C.L. en_US
dc.identifier.issn 0566-3954 en_US
exeter.contacts.depositing-owner-email Shail, Robin <R.K.Shail@exeter.ac.uk> en_US
exeter.contacts.owner-email Shail, Robin <R.K.Shail@exeter.ac.uk> en_US
exeter.place-of-publication TORQUAY, ENGLAND en_US
dc.identifier.journal Geoscience in South-West England en_GB


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