- Volume 9 Issue 4
Geochemistry and Molybdenum Mineralisation of the Shap Granite, Westmorland, Northern England
영국(英國)의 북부(北部) Westmorland 지역(地域)에 분포(分布)한 Snap 화강암(花崗岩)의 지화학적(地火學的) 연구(硏究)와 휘수연석(輝水鉛石)의 광화작용(鑛化作用)에 관(關)한 연구(硏究)
- Kim, Sahng Yup (Department of Earth Sciences, University of Leeds)
- Published : 1976.12.31
The Shap granite encloses well developed quartz veins and veinlets containing molybdenite in association with other ore sulphide minerals. The preliminary study of the geochemical aspects of the granite stock and mineralisation of molybdenite in comparison with the porphyry deposits is carried out; the distribution of major, minor and ore metal elements in wall rocks, altered envelope and veins, and the molybdenum mineralisation, mainly in connexion with hydrothermal alteration are discussed. The molybdenite and other ore mineralisation, especially bismuthinite and chalcopyrite, are spatially closely related to the hydrothermal alteration adjacent to the veinings, and are dominant where the strong orthoclase alteration has taken place. A pattern of alteration and mineralisation can be recognised and forms the basic for the subdivision of the quarry into several distinct zones, which correspond with the sequence of alteration and mineralisation. The veins, veinlets and their alteration haloes can be further subdivided into a series of concentric zones.