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Diagenetic Controls on Hydrothermal Fluid Flow in the Osiris, Isis, and Isis East Carlin-Type Gold Showings, Nadaleen Trend, YukonDownload
Following ATAC Resources Ltd.’s 2010 discovery of the gold prospects in the Nadaleen Trend (Central Yukon), company geologists and consultants determined that Precambrian carbonate rocks within the trend contain large endowments of gold located in the hinges of anticlines and fault zones. ...
Dolomite Recrystallization Along the Rimbey-Meadowbrook Reef Trend,Western Canada Sedimentary Basin, Alberta, CanadaDownload
Three theoretical alternatives of what can happen to dolomite when it recrystallizes (steady recrystallization, stepwise recrystallization, or no recognizable signs of recrystallization) were tested on Leduc dolomites of the Devonian Rimbey–Meadowbrook reef trend located in Alberta, Canada. Four...
Origin of Island Dolostone: Case Study of Cayman Formation (Miocene), Grand Cayman, British West IndiesDownload
Grand Cayman is located on an isolated fault block that is part of the Cayman Ridge that defines the southern margin of the North American Plate. The exposed part of the Oligocene to Pleistocene carbonate succession that forms the island comprises the Bluff Group (Brac Formation, Cayman...
Origin of island dolostones: case study based on Tertiary dolostones from Cayman Brac, British West IndiesDownload
Cayman Brac (19 km long, 1.5 to 3 km wide), which is the easternmost of the Cayman Islands, is characterized by a thick Tertiary carbonate succession that has been pervasively dolomitized. The finely crystalline dolostones in the Cayman Formation (Miocene) are fabric-retentive whereas the...
Sedimentology, diagenesis, and dolomitization of the Brac Formation (Lower Oligocene), Cayman Brac, British West IndiesDownload
The Oligocene Brac Formation is the oldest part of the Bluff Group that is exposed on Cayman Brac. Sediments of the Brac Formation were deposited on a small, open bank in shallow marine waters. Today, the formation is composed of limestone, finely crystalline dolostone, and coarsely crystalline...
Spatial variations in the stoichiometry and geochemistry of Miocene dolomite from Grand Cayman: Implications for the origin of island dolostone.Download
The Cayman Formation (Miocene), ~ 140 m thick on Grand Cayman, is incompletely dolomitized with the most of the dolomite restricted to the peripheral part of the island. These calcium-rich dolomites, with 50–60 mol%CaCO3 (%Ca), are divided into low-calcium dolomite (LCD, %Ca < 55%) and...
The trace metal content of modern and ancient peritidal and shallow subtidal dolomites: significance and systematicsDownload
Dolomitization has traditionally been regarded as being related to the interaction of thermally active Mg-rich fluids with poorly ordered carbonate precursors of elusive origin. Our ideas on how such precursors form have evolved rapidly since the late 1990s, and microbes are now considered key...