The copper–gold ores of the Moonta mineral field, in the eastern part of the Archaean–Mesoproterozoic Gawler Craton, South Australia, are vein deposits occupying fractures and shear zones within the Palaeoproterozoic Moonta Porphyry. The veins show a spatial relationship with Mesoproterozoic granites, equivalents of the Hiltaba Suite granites that are widespread in the Gawler Craton. The ores w...

Meso– to Neoproterozoic geological and paleomagnetic data support a direct connection between Baltica Laurentia in both Nuna Rodinia supercontinents, however different relative configurations. Previous limit the time of break-up core configuration ca. 90° rotation 1.27 Ga 0.99 Ga. Despite well documented motion continents, tectonic mode during has been questioned operation single lid tectonics ...

Title of Document: AN INTEGRATED ISOTOPIC AND BIOMARKER ANALYSIS OF THE GLACIOGENIC VAZANTE GROUP, BRAZIL Kristen E. Miller, Ph.D, 2012 Directed By: Professor, Alan J. Kaufman, Department of Geology The Vazante Group, a meta-sedimentary succession located in south-central Brazil, contains several intervals of diamictite, interpreted as glacial in origin, bracketed by well-preserved carbonate an...

The Mesoproterozoic era has long been considered a time of relative environmental and biological stasis. However, emerging insight suggests that this period may have more dynamic than previously considered, both in terms oxygenation potential consequences for evolution. Nevertheless, our understanding immense remains limited. To provide detailed constraints on dynamics, we report multiproxy geo...

The sandstone-hosted Beverley uranium deposit is located in terrestrial sediments in the Lake Frome basin in the North Flinders Ranges, South Australia. The deposit is 13 km from the U-rich Mesoproterozoic basement of the Mount Painter inlier, which is being uplifted 100 to 200 m above the basin by neotectonic activity that probably initiated in the early Pliocene. The mineralization was deposi...

FIG. 1.—Generalized location map of Big Cottonwood Canyon, southeast of Salt Lake City. Circled numbers refer to measured sections of: 1, Storm Mountain (Fig. 7); 2, S-curve (Fig. 9B); 3, Moss Ledge (Fig. 9A). ABSTRACT: The Mesoproterozoic to Neoproterozoic Big Cottonwood Formation of north-central Utah contains some of the oldest known (; 900 Ma) examples of cyclic tidal rhythmites. Despite mi...