... and by the calcite-dolomite geothermometer. Several piled tectonic units, belonging to the Tuscan and Subligurian domains, constitute the backbone of the Monti dell’Uccellina range. These are, from bottom to top: 1) the Torre Cannelle Unit, made up by the Verrucano Group rocks; 2) the Talamone Unit, made up...

..., 5.4 g/t Au; 35 to 80 m of 0.8 % Cu, 0.6 % Bi, 80 g/t Ag, 4 g/t Au Testa ( 2019 )   La Juanita Central Chile 34.24°S, 70.32°W 0.279 Mt at 3 % Cu Cannell ( 2004 )   Emperatriz La Zanja, Peru 6.83°S, 78.91°W 25 Mt at 0.83 % Cu and 0.5 g/t Au Buenaventura ( 2018 )   Ann Mason...

... by a drop of Cu/(Na + K + Mn + Fe) ratios of over four orders of magnitude through the evolution of the deposit from stage 2 to stage 4. The highest Mo concentrations occur in residual brines resulting from extreme boiling, as indicated by concurrent halite saturation. Recent geochronology ( Cannell, 2005...

...William G. Kane; Guy B. Gierhart ABSTRACT The Eocene contacts as they appear along the Rio Grande in Texas have been traced southward into Mexico as far as the Rio San Juan. The nomenclature and contacts used are with slight modifications the same as those at present accepted by the United States...

... copper deposits and arc volcanoes that generate porphyritic volcanics. The Don Manuel igneous complex intrusions progressed from quartz monzonite through rhyolite and biotite tonalite to intermediate porphyritic and basaltic andesite dikes, which intrude the older units. Mineralization is associated...

... ; R einhardt & R ossetti , 2004 ). From a structural point of view, four different tectonic units can be distinguished. From the bottom, “Monticiano-Roccastrada Unit”, that includes Carboniferous to Trias formations, consists of shales, phyllites, quartzites and anagenites (Verrucano Formation...

... ”, P. Fenoll Hach-Ali , J. Torres-Ruiz , F. Gervilla , eds. Univ. of Granada , Granada , 205 – 209 . Drake , B. , Prater , C.B. , Weisenhorn , A.L. , Gould , S.A.C. , Albrecht , T.R. , Quate , C.F. , Cannell , D.S. , Hansma , H.G. , Hansma , P.K...

... Canyon (Utah, United States), which quantifies the essential characteristics, approximate dimension, and temporal evolution of a large pluton that generated the deposit. The mineralized district shows a distinct WSW-ENE–striking magnetic anomaly indicating a large intrusive body underlying...

... on zircons at the Pacific Center for Isotopic and Geochemical Research at the University of British Columbia (Canada). Another radiometric age of the late breccia was determined by U-Pb LA-ICPMS on zircons at the Arizona LaserChron Center, University of Arizona, United States. Details of the dating methods...

..., and orthoclase. The ore deposit is hosted in part by 16.77 ± 0.25 to 17.20 ± 0.05 (2σ) Ma andesitic volcanic strata of the Farellones Formation, but the major host rocks are units of the San Francisco batholith, including the 11.96 ± 0.40 Ma Río Blanco granodiorite (mine terminology), the 8.40 ± 0.23 Ma Cascada...

..., Jade Star, United States Marlowe, Karl, United States Reading, David, United Kingdom Rogers, Thomas, Botswana Rudin, Arnoldo, Costa Rica Torres, Pablo, Chile Zieg, Gerald, United States Hugo T. Dummett Fund $500 Ahler, Bruce, United States Broughton, David, Canada $100-$200 Bahia-Guimaraes, Paulo...

... et al., 1968 ; Cannell et al., 2005 ). The challenge of this model may be overcome by continued delivery of aqueous phase from a large subjacent magma chamber to the top of a porphyry stock via a narrow column of vertically convecting magma ( Shinohara et al., 1995 ). In this case, hydrothermal...

... by unidirectional solidification textures and miarolithic cavities for several porphyry Cu-Au-Mo systems (e.g., Kirkham and Sinclair, 1988 ; Lickfold et al., 2003 ; Harris et al., 2004 ; Cannell et al., 2005 ; Kirwin, 2005 ; Yang et al., 2009 ). Occurrences of coeval melt and fluid inclusions in vein quartz...

... deposit containing 100 Mt Cu. This is similar to El Teniente (Chile) as the largest known deposit dominated by one concentric ore shell ( Cannell et al., 2005 ; Spencer et al., 2015 ). An assumed initial Cu concentration of 100 ppm in the basaltic melt is at the upper end of published estimates. Sourcing...

... and the faults west of San Clemente Island, floored by rocks characteristic of the Franciscan Complex (Catalina Schist Belt of Vedder, 1987 ); and (3) the Outer Borderland, also characterized by northwest-trending structural and geomorphic features, with Neogene sedimentary and volcanic units overlying...

... and between 0.60 and 0.85 for chlorite rosettes within dull-luminescent quartz ( Fig. 10A ). Specifically, the rims of chlorite rosettes are Fe rich and plot close to the daphnite field ( Fig. 10 ). Tetrahedral silicon varies from 5.36 to 5.82 atoms per formula unit (a.p.f.u.). Electron microprobe analyses...

..., Gerald Carlson Matthew Bidwell, Royal Gold, Inc., Denver, United States: Curtis J. Freeman, Patrick Highsmith Ariadne Borgo, Federal University of Parana, Curitiba, Brazil: João Carlos Biondi, Alvaro Penteado Crosta James Cannell, MMG Ltd., Coningham, Australia: Zhaoshan Chang, Mary Doherty Jennifer...