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 12 of 12 for “"ore genesis"”.
-
Microbial carbon within and above exotic copper deposits in northern Chile : implications for ore genesis and exploration
… herein to clarify the environment of exotic ore formation and to provide guidelines for the exploration for non-outcropping mineralisation. Two main sample suites were examined: chrysocolla-rich ores from the Huinquintipa and Mina Sur deposits; and soils overlying a paleochannel in the …
-
Geometric and hydrodynamic modelling of fluid-structural relationships in the southeastern Athabasca Basin, Saskatchewan, Canada, with implications for uranium ore genesis
… that both sandstone-hosted and basement-hosted orebodies may be generated at different stages of deformation within the same fault system under a unified compressional stress regime. The results of this research confirm the importance of pre-existing basement faults in the formation of …
-
The role of gypsum in Cu-Co ore genesis within the Upper Miocene Boleo deposit of the Santa Rosalía Basin, Baja California Sur, México
… indicates coeval deposition of evaporites and ores. The study identifies segmented normal fault arrays as feeder zones for metal-enriched hydrothermal fluids, with subsurface gypsum bodies acting as halogen suppliers. These feeders exhibit distinct metal tonnages and ratios, indicating …
-
ΚΑΤΑΝΟΜΗ ΤΩΝ ΣΤΟΙΧΕΙΩΝ ΤΗΣ ΟΜΑΔΑΣ ΤΟΥ ΛΕΥΚΟΧΡΥΣΟΥ (PGE) ΚΑΙ ΤΟΥ ΧΡΥΣΟΥ ΣΕ ΧΡΩΜΙΤΙΚΑ ΜΕΤΑΛΛΕΥΜΑΤΑ ΚΑΙ ΠΕΤΡΩΜΑΤΑ ΤΟΥ ΟΦΙΟΛΙΘΙΚΟΥ ΣΥΜΠΛΕΓΜΑΤΟ...
… VARIATION IN THE COMPOSITION OF CHROMITE ORES AND HOST ROCKS,WHICH WAS CONSIDERED BY PREVIOUS AUTHORS TO BE VERY RESTRICTED. CHROMITE AND HOST ROCK GEOCHEMISTRY STUDY THROUGHOUT THE VOURINOS OPHIOLITE COMPLEX LED TO THE DISTINCTION OF THREE DIFFERENT GEOTECTONIC UNITS, CORRESPONDING TO …
-
The sedimentology and diagenesis of copper-bearing rocks of the southern margin of the Damaran Orogenic Belt, Namibia and Botswana
… and Ghanzi Formations outcrop on the southern foreland of the Damaran Orogenic Belt, and contain stratiform copper ore deposits. This thesis presents sedimentological, diagenetic and isotopic studies of these sediments, defines the controls on copper mineralization and presents a model for ore …
-
Sulfidation of synthetic biotites
… the biotite in the top was found to have become more Mg-rich and the biotite in the bottom was found to have become more Fe-rich while a pyrrhotite of apparently homogeneous composition was found throughout the capsule. Five equilibrium determinations at 700°C have been located: (N)<sub>Po</sub> = …
-
Paleomagnetic and mineral magnetic studies of zinc-lead ore deposits in the Metaline (Washington state, USA) and Midlands (Ireland) ore fields
Keywords: Ore deposits, Ireland, Ore fields, Zinc-lead ore, Metaline ore field, Midlands ore field . Carbonate-hosted Zn-Pb deposits of the Metaline (USA) and Irish Midlands (Ireland) ore fields exhibit features of both MVT and SEDER deposits, and therefore, play an important role in the debate …
-
The isotope geochemistry of uranium: Igneous petrology, ore deposits, and groundwater contamination
… settings: basalt differentiation, uranium ore genesis, and the remediation of a uranium-contaminated groundwater system. In the latter two cases, 238U/235U is used as a tracer of uranium reduction. 238U preferentially enters the reduced (solid) U phase, thus analysis of U ores can reveal …
-
Multi-stage orogenic gold mineralization of the Pine Lake greenstone belt: evidence from the Seabee Gold Operation, Trans-Hudson orogen, northern Saskatchewan
… including the role that intrusions play during ore genesis. In this study, mineralized samples from the Santoy Mine Complex and Fisher property along the Santoy shear system were studied to compare the lithological, mineralogical, and mineralization characteristics associated with sulfide-gold …
-
Origin of the Kleva Ni-Cu sulphide mineralisation in Småland, southeast Sweden
The Kleva Ni-Cu sulphide deposit is situated within a gabbro-diorite intrusive complex in southeast Sweden. The basement north of the intrusive complex is dominated by 1.81–1.77 Ga granites of the Palaeoproterozoic Transscandinavian Igneous Belt (TIB). Slightly older (1.83–1.82 Ga) rocks of the …
-
Lithium at the Thacker Pass deposit, Humboldt County, Nevada, U.S.A.
… Li clay reserve with ~1.56 Mt of Li supply. Ore-grade lithium occurs in a ~100-m-thick sequence of interbedded lacustrine dark greenish brown to dark greenish gray carbonaceous shale and volcaniclastic siltstone, and thin, light gray rhyolitic ash beds. The strata were deposited inside the …