Monazite in polymetallic chlorite-(tourmaline)-quartz-(fluorite)-cassiterite-sulphide lodes and its potential for constraining the chronology of magmatic hydrothermal mineralisation in Cornwall.

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Monazite in polymetallic chlorite-(tourmaline)-quartz-(fluorite)-cassiterite-sulphide lodes and its potential for constraining the chronology of magmatic hydrothermal mineralisation in Cornwall.

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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 2011-12-16T17:09:54Z en_US
dc.date.accessioned 2013-03-20T12:56:20Z
dc.date.issued 2003 en_US
dc.description.abstract Monazite [(Ce, La, Th, Nd, Y) PO4] occurs far more widely within the magmatic hydrothermal lode systems of Cornwall than has been previously recognised. In situ and mine dump specimens analysed by binocular and transmitted light microscopy, SEM, XRD and whole rock XRF reveal a near ubiquitous association of hydrothermal monazite with polymetallic chlorite-(tourmaline)-quartz- (fluorite)-cassiterite-sulphide mineralisation. The assemblage is interpreted to represent an early lode paragenesis formed by mixing of magmatic hydrothermal fluids with meteoric and/or metamorphic fluids derived from the country rocks. Such a model may explain why these assemblages are not observed in mines that have worked at greater depths within the granite. Major advances in understanding the chronology of granite magmatism across SW England using U-Pb monazite and xenotime methods have not, to date, been matched by the same level of success with respect to the development of the productive major lode systems. This discovery of widespread hydrothermal monazite raises the potential for high precision U-Pb dating of such mineralisation across the Cornubian Orefield. Where paragenetic relationships can be established it may also be possible to construct a fine-scale chronology for individual lode systems. en_GB
dc.identifier.citation Vol. 10 (4), pp. 403 - 409 en_GB
dc.identifier.uri http://hdl.handle.net/10036/3330 en_US
dc.language.iso en en_GB
dc.publisher The Ussher Society en_GB
dc.relation.url http://www.ussher.org.uk/ en_GB
dc.title Monazite in polymetallic chlorite-(tourmaline)-quartz-(fluorite)-cassiterite-sulphide lodes and its potential for constraining the chronology of magmatic hydrothermal mineralisation in Cornwall. en_GB
dc.date.available 2011-12-16T17:09:54Z en_US
dc.date.available 2013-03-20T12:56:20Z
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
dc.identifier.journal Geoscience in South-West England en_GB
pubs.organisational-data /Symplectic Joint Venture en_US
pubs.organisational-data /Symplectic Joint Venture/Exeter en_US
pubs.organisational-data /Symplectic Joint Venture/Exeter/All Exeter Users en_US
pubs.organisational-data /Symplectic Joint Venture/Exeter/College of Engineering, Mathematics & Physical Sciences en_US
pubs.organisational-data /Symplectic Joint Venture/Exeter/College of Engineering, Mathematics & Physical Sciences/All Academic Staff (CEMPS) en_US
pubs.organisational-data /Symplectic Joint Venture/Exeter/College of Engineering, Mathematics & Physical Sciences/Camborne School of Mines en_US


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