...S. H. BOTTRELL; B. SPIRO Abstract Isotopic determinations have been made on minerals from mineralized veins (including inclusion fluids), altered wall-rocks and host shales from the Clogau-St Davids gold mine and smaller mines in the Dolgellau Gold Belt. The Clogau Formation shales hosting...

... Geological Society of London References Allen P. M. Jackson A. A. The Bryn-Teg borehole, North Wales Bulletin of the Geological Survey G.B 1978 61 Andrew A. R. The geology of the Dolgellau Gold Belt, North Wales Geological Magazine 1910 7 159 71 201 11 261 71...

... locality, the Clogau gold mine, Dolgellau Gold belt, Gwynedd, North Wales, United Kingdom. The mineral and name have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA2023–062). The aleksite series is an accretional...

... is sensitive to S present as H 2 S or COS but not CS 2 or SO 2 .Analyses of inclusion fluids from unmineralized feeder veins in the Dolgellau gold belt, north Wales, indicate that Au(HS) (super -) 2 predominated over AuCl (super -) 2 as the major gold-transporting complex. GeoRef, Copyright 2006, American...

...” by Lipovetskiy et al. (1976) , occurs as platy grains up to 1 mm in size within sulfide–quartz veins. Other occurrences of aleksite include the Kochkar deposit, Ural Mountains, Russia ( Spiridonov et al. 1989 ), the Clogau mine, Dolgellau gold belt, Gwynedd, Wales, U.K. ( Bevins & Stanley 1990...

... mineralization in the Dolgellau Gold Belt, North Wales. S. H. Bottrell (University of Leeds). Isotopic determinations have been made on minerals from the mineralized veins (including inclusion fluids), altered wall rocks and host shales from the Clogau-St Davids goldmine and smaller mines in the Dolgellau Gold...

... we describe, in detail and for the first time, quartz-hosted gold occurrences in the Gwynfynydd mine, Dolgellau Gold-Belt, North Wales, United Kingdom (Fig. 1 ). This study provides a starting point for the development of models of lateral grade variation and demonstrates the types of structural...

... information as to the nature of vein formation and gold localization. The critical role of geological mapping cannot be overemphasized. This section addresses vein geology and development in the light of the case studies presented later (Dolgellau Gold-Belt, U.K. and Tarnagulla and Bendigo Goldfields...

... collector, A. C. Selwyn, who was then in Victoria, Australia. At about the time Ramsay was writing his memoir, various workers (Belt, Barlow, Plant, and Williamson) were concerned with the Dolgellau gold mining area in North Wales and they found trilobites in the upper Mawddach area. Belt and Plant...

..., Bottrel, Shepherd, Yardley and Dubessy observed that where the veins of the Dolgellau gold belt intersected graphitic units, the fluid inclusions contained immiscible 36 137 138 F L U I D I N C L U S I O N S CH4-H,0 fluids. The auriferous veins of the Clogau-St Davids mine contained high-salinity aqueous...

.... 1990 . Fluids in Hercynian Au veins from the French Variscan belt . Mineralogical Magazine , 54 , 231 – 243 . Bottrell , S.H. & Spiro , B. 1988 . A stable isotope study of black shale-hosted gold mineralization in the Dolgellau Gold Belt, North Wales . Journal...

... Science Evidence of a pre-tectonic origin for the auriferous vein-type mineralization of Dolgellau gold belt, North Wales— J.S. Mason, W.R. Fitches, and R.E. Bevins B45 Ore petrology and metamorphic mobilization of copper ores in red beds, southwest County Cork, Ireland— Ni Wen et al. B53...

... S 3 Cgt Clogau Mine, Dolgellau Gold belt, Gwynedd, North Wales, United Kingdom (52°45’42” N, 3°58’05” W) Nigel J. Cook*, Cristiana L. Ciobanu, Jie Yao, Christopher J. Stanley, Wenyuan Liu, Ashley Slattery and Benjamin Wade *E-mail: [email protected] Related to aleksite...

... Kojonen 327 Gold mineralization in the palaeoproterozoic rocks of Sanjela-Manpur-Dugocha belt, Salumbar area, Udaipur district, Rajasthan— Suresh Chander and C.P. Sisodia 463 Uranium and polymetallic suphide mineralization in the banded iron formation at Udaisagar, Udaipur District, Rajasthan...

.... The Gwynfynydd gold mine is located in the Dolgellau Gold-Belt, North Wales, United Kingdom. Underground mining commenced in the early 1860s with production to date of about 5 t. The last period of working commenced in early 1992 and terminated in mid-1999 under the auspices of Welsh Gold PLC. The east-north...

... , Impact of recreational suction dredging on mobilization of anthropogenic mercury in gold placers : Southeastern Geology , v. 37 , p. 109 – 114 . Naden , J. , 1988 , Gold mineralization in the Caledonides of the British Isles with special reference to the Dolgellau gold-belt, North Wales...

... , A fluid inclusion model for the genesis of the ore of the Dolgellau gold belt, North Wales : Journal of the Geological Society [London] , v. 145 , p. 139 – 145 . Brown , P.E. , and Hagemann , S.G. , 1995 , MacFlincor and its application to fluids in Archean lode-gold deposits...

... inclusions in vein quartz of the Dolgellau gold belt in north Wales contain 0.19 to 0.27 mol percent N 2 ( Bottrell and Miller, 1990 ), and significant amounts of N 2 in the ore-forming fluids have also been measured from gold deposits in Alaska ( Goldfarb et al., 1997 ) and the Central and North Deborah...