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Abdallah Atef, Adel A. Surour, Ahmed A. Madani and Mokhles K. Azer
Since Antiquity, sustainable resources of gold and copper have been mined at two prominent prospects in the north Eastern Desert of Egypt, namely the south Gabel Um Monqul (SGUM) and Gabal Al Kharaza (GKZ). Mineralization is hosted by Neoproterozoic shie...
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George E. Mustoe and Graham Beard
Calcite-mineralized wood occurs in marine sedimentary rocks on Vancouver Island, British Columbia at sites that range in age from Early Cretaceous to Paleocene. These fossil woods commonly have excellent anatomical preservation that resulted from a permi...
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Ashley R. Manning-Berg, R. Seth Wood, Kenneth H. Williford, Andrew D. Czaja and Linda C. Kah
The complex nature of growth and decomposition in microbial mats results in a broad range of microbial preservation. Such taphonomic variability complicates both the description of microbial elements preserved within geologic materials and the potential ...
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Morgane Ledevin, Nicholas Arndt, Catherine Chauvel, Etienne Jaillard and Alexandre Simionovici
The Buck Reef is a 250?400 m thick sequence of banded black and white (B&W) cherts deposited ca. 3416 Ma ago in a shallow basin. We provide field, petrological and geochemical constraints on the chert-forming process and the origin of the banding. Wh...
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George E. Mustoe, Mike Viney and Jim Mills
Central Wyoming, USA, was the site of ancient Lake Gosiute during the Early Eocene. Lake Gosiute was a large body of water surrounded by subtropical forest, the lake being part of a lacustrine complex that occupied the Green River Basin. Lake level rises...
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George E. Mustoe
Petrified wood has traditionally been divided into two categories based on preservation processes: permineralization (where tissues are entombed within a mineral-filled matrix) and replacement (where organic anatomical features have been replicated by in...
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Fernando G. Sardi
Pág. 3 - 18
The different rocks that host the tungsten-bearing quartz veins from central-eastern sector of the Famatina System (La Rioja, Argentina) are part of the crystalline basement of this unit. Petrographic and geochemical studies demonstrate that the emplacem...
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Lux, A. Luxova, M. Abe, J. Morita, S. Inanaga, S.
Pág. 85 - 91
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Waldo Vivallo,Sergio Espinoza,Fernando Henriquez
Pág. 75 - 88
ABSTRACT. Metasomatism and hydrothermal alteration in the Cerro Negro Norte iron ore district, Copiapo, Chile. The magnetite-apatite ores in the Cerro Negro Norte iron district, Copiapo, are hosted by hydrothermally altered andesitic volcanic rocks. As a...
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Roman Flores
Pág. 57 - 69
ABSTRACT. Geology of the gold-bearing porphyry of the Verde Refugio project, northern Chile. The Verde deposit is an early Miocene gold-bearing porphyry located in the Refugio property within the Maricunga Belt. Lithological types within the deposit incl...
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