Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Arc complex"”.
-
Geodynamic evolution and petrogenesis of the neoarchaean Francistown granite-greenstone complex in NE Botswana, SW margin of the Zimbabwe craton
The Archaean Francistown Granite-Greenstone Complex in NE Botswana is an integral part of the southwestern margin of the Zimbabwe Craton. It includes a suite of geochemically diverse Neoarchaean granitoids and mafic dominated-supracrustal assemblages. All the supracrustal rocks and mafic intrusions …
-
Distribution of Platinum Group Elements in the New Afton Alkalic Cu-Au Porphyry Deposit, Kamloops, British Columbia
… British Columbia, within the Quesnel island arc terrane, a Late Paleozoic to Mesozoic arc complex that occupies the eastern part of the Intermontane Belt of the Canadian Cordillera. Bulk rock and sulfide minerals from New Afton contain potentially economic concentrations of platinum group …
-
Continental Arc Processes in British Columbia and Earthquake Processes in Virginia: Insights from Seismic Imaging
… seismic survey across the Coast Plutonic Complex and Stikine terrane of British Columbia were inverted to derive two dimensional P and S-wave seismic velocity models of the crust and uppermost mantle. A felsic upper crust and a felsic to intermediate middle crust are observed in both the …
-
Sedimentological constraints on Precambrian crustal evolution in northern New Mexico
… This juvenile crust developed as a magmatic arc complex and represents an early period of crustal instability. Between 1,755 and 1,700 m.y., the volcanogenic sequence was intruded by voluminous, coeval granodiorites and tonalites which stabilized the early crust. Unconformably overlying the …
-
Proterozoic evolution of the Zuni Mountains, New Mexico: Peridotites, granites, rhyolites, shear zones, and a reactivation history through the present
… trend and is interpreted to be part of an arc complex. Tectonic emplacement of the peridotite, arc magmatism, and the intrusion of arc-related 1.65 granites and rhyolites were followed by a younger shearing event. A 10 km long shear zone trends WNW, dips 60 degrees south and has a …
-
Gromov boundaries of complexes associated to surfaces
… first proof of the uniform hyperbolicity of the arc graph using unicorn arcs. For closed surfaces, their proof is indirect, but Przytycki and Sisto gave a more direct proof of hyperbolicity in that case using bicorn curves. In this dissertation, we extend the notion of unicorn arcs and bicorn …
-
The geology of the Khayyam and Stumble-On deposits, Prince of Wales Island, Alaska
… Ordovician Wales Group, a metamorphosed volcanic arc complex within the Alexander tectonostratigraphic terrain. These massive sulfide deposits are interbedded with schist layers of siliceous, felsic, intermediate and mafic composition from 1 m to 30 m thick. Within the study area, these strata …
-
Combinatorial complexes associated to surfaces
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms