dc.contributor.author | LeBoutillier, N.G. | en_GB |
dc.contributor.author | Shail, RK | en_GB |
dc.contributor.author | Jewson, C. | en_GB |
dc.date.accessioned | 2011-12-16T17:09:54Z | en_GB |
dc.date.accessioned | 2013-03-20T12:56:20Z | |
dc.date.issued | 2003 | en_GB |
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_GB |
dc.language.iso | en | en_GB |
dc.publisher | The Ussher Society | en_GB |
dc.relation.url | http://ussher.org.uk/journal/catalogue/volume-10-part-4-2003 | 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_GB |
dc.date.available | 2013-03-20T12:56:20Z | |
dc.identifier.issn | 0566-3954 | en_GB |
dc.identifier.journal | Geoscience in South-West England | en_GB |