https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.seals.ac.za/vital/access/manager/Repository/vital:31505 Wed 15 Mar 2023 12:59:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:21151 Wed 12 May 2021 23:36:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:20354 Wed 12 May 2021 23:22:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5063 Wed 12 May 2021 23:21:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4920 Wed 12 May 2021 23:21:47 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4953 Wed 12 May 2021 22:55:19 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4941 Wed 12 May 2021 22:54:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5035 Wed 12 May 2021 22:40:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4984 Wed 12 May 2021 22:36:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4910 Wed 12 May 2021 22:17:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28203 Wed 12 May 2021 21:01:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5079 Wed 12 May 2021 20:48:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4935 Wed 12 May 2021 20:32:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4936 Wed 12 May 2021 19:51:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:20343 Wed 12 May 2021 19:39:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:25998 Wed 12 May 2021 19:35:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4930 Wed 12 May 2021 19:35:22 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4917 Wed 12 May 2021 19:30:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5015 Wed 12 May 2021 19:27:12 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4950 Wed 12 May 2021 19:24:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4934 Wed 12 May 2021 19:21:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5056 53% TiO₂); the ilmenite high with zircon and rutile shows tendency to increase northwards while ilmenite low increase southwards. Zircon, monazite, rutile, chromite, kyanite and staurolite show low variability, which is probably associated with high resistance of minerals for abrasion during transportation and diagenesis. The depositional model of the Namalope deposit, in the flat area and wet concentrate plant B in particular, suggests deposition in a shallow marine environment associated with regression for deposition of Unit 6, 7 and 9 and transgression during deposition of Unit 82. The spatial distribution of heavy minerals in the Namalope deposit and its environment of deposition are the key points for discovery of new deposits around the Namalope with the same characteristic of mineral assemblage and they are used for mine strategic plans such as update block model and mine design.]]> Wed 12 May 2021 19:01:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5038 Wed 12 May 2021 19:00:22 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4997 Wed 12 May 2021 18:59:01 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:20711 Wed 12 May 2021 18:56:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5033 Wed 12 May 2021 18:37:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4966 Wed 12 May 2021 18:26:26 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4947 Wed 12 May 2021 18:24:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5092 Wed 12 May 2021 18:15:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5012 the major evolutionary changes in response to thickening and a greater rigidity of the sialic crust. Rifts are penetrative taphrogenic faults in the earths crust which act as major conduits for the transfer of magmas, from the mantle and lower crustal levels, to the upper crust and the surface. Rifts are also permeable zones for the migration of metalliferous brines, generated by magmatic differentiation. These metalliferous brines would either be exhaled at surface to form stratiform volcanogenic and volcanosedimentary ore deposits , or would interact with preferential host horizons to form stratabound ore deposits . The associat ion between rifting and stratiform and stratabound ore deposits is illustrated by examining :he tectonic setting, and st ratigraphic relationships of typical ore deposit types .]]> Wed 12 May 2021 18:01:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4907 Wed 12 May 2021 18:00:19 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5036 Wed 12 May 2021 17:59:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4916 Wed 12 May 2021 17:42:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5095 Wed 12 May 2021 17:40:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5089 Wed 12 May 2021 17:33:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28367 116 Moz of endowment and contribute to making south-west Ghana the greatest Paleoproterozoic gold province in the world. Gold deposits in the Kumasi Basin are shear zone hosted and mineralisation ranges from disseminated to massive sulphide refractory deposits, to free milling quartz vein style deposits. Structural relationships and age dating indicate that most deposits are genetically related and were formed during a single episode of gold mineralisation during the D4 NNW-SSE crustal shortening deformation event of the Eburnean Orogeny (2125 – 1980 Ma). The understanding of structural controls on mineralisation is critical for exploration success as it allows exploration to focus on areas where these structural controls exist. This study uses a mineral systems approach to understand the relationship between the geodynamic history and structural controls on gold mineralisation in the Kumasi Basin at various scales, and define targeting criteria which can be applied for the purpose of developing predictive exploration models for making new discoveries in the Asanko Gold Mine camp located in the Asankrangwa Belt. The study used a quantitative analysis to establish residual endowment potential in the Asankrangwa Belt, providing the basis for a business model and resulting exploration strategy. Once established, a Fry autocorrelation analysis was applied to identify trends in deposit and camp spatial distribution to which critical geological processes were ascribed. Observed trends were mapped from multi-scale geophysical data sets and through interpretation of existing geophysical structure models, and structural criteria for targeting orogenic gold deposits at the regional and camp scales were developed. Results show that different structural controls on mineralisation act at the regional and camp scale. At the regional scale the distribution of gold camps was found to be controlled by fundamental N-S and NW-SE basement structures with gold camps forming where they intersect NE-SW first and second order structural corridors. At the Asanko Gold Mine camp scale, deposit distribution was found to be related to the intersection between major second order D3 NE-SW shear zones, minor third order D4 NNE-SSW brittle faults, and cryptic NW-SE upward propagating basement structures. In addition to these structural criteria, deposits in the Asanko Gold Mine camp were found to be aligned along a NNE-SSW lineament caused by the interaction between the N-S basement structure and the NE-SW trending Asankrangwa Belt shear corridor.]]> Wed 12 May 2021 17:27:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5047 Wed 12 May 2021 17:19:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28201 Wed 12 May 2021 17:17:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4918 Wed 12 May 2021 17:10:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5046 Wed 12 May 2021 16:38:02 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4961 Wed 12 May 2021 16:29:16 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5032 Wed 12 May 2021 16:25:28 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4931 Wed 12 May 2021 16:20:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4897 Wed 12 May 2021 16:05:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4951 Wed 12 May 2021 16:00:57 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:41467 Wed 12 May 2021 14:57:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:41496 Wed 12 May 2021 14:24:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27452 Wed 12 Apr 2023 15:20:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:65376 Tue 16 Jan 2024 14:30:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45201 Thu 23 Jun 2022 10:11:47 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:57253 Thu 20 Oct 2022 09:50:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5029 Thu 13 May 2021 16:30:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5087 Thu 13 May 2021 13:12:25 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4973 Thu 13 May 2021 11:24:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4942 Thu 13 May 2021 08:54:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5024 Thu 13 May 2021 08:49:11 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5075 Thu 13 May 2021 08:49:03 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4954 Thu 13 May 2021 08:47:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5016 Thu 13 May 2021 08:17:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5074 Thu 13 May 2021 07:43:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4921 Thu 13 May 2021 07:40:38 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4939 Thu 13 May 2021 07:37:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4912 Thu 13 May 2021 07:10:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5017 Thu 13 May 2021 07:06:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4911 Thu 13 May 2021 06:09:58 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4901 Thu 13 May 2021 06:08:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4994 Thu 13 May 2021 05:53:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4976 Thu 13 May 2021 05:31:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4940 Thu 13 May 2021 05:30:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:38497 Thu 13 May 2021 05:20:34 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:21248 Thu 13 May 2021 04:27:28 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5044 Thu 13 May 2021 04:16:34 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4906 Thu 13 May 2021 04:14:58 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5026 Thu 13 May 2021 04:09:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5009 Thu 13 May 2021 04:02:19 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4926 Thu 13 May 2021 03:55:11 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5049 8500°) obtained from quarternary Qz-An-Ab-Or- H₂0 plots. The metamorphic grade increases westwards from medium grade to high grade. In the east, the metapelites contain andalusite, and coexisting muscovite and quartz. This indicates that temperatures of 6000° at 3,5- 4 kb pressure were attained. In the west, coexisting wollastonite and anorthite in the Khan gneisses indicate pressure- temperature conditions of 720° at 4,5-5 kb. Two tectonic events were responsible for the regional structure. An early F₁ episode produced east- west oriented overturned folds and was followed by an intense F₂ episode of isoclinal folding which is responsible for the dominant northeast - southwest regional fabric. The interference of these folds in the proximity of the underlying basement produced the complex dome and basin structures seen in the central and western parts of the area. An F₃ episode of minor importance was also recognized. The presence of continental basement rocks in this central part of the Damara belt is evidence for formation of the orogen by in-situ deformation rather than continental collision.]]> Thu 13 May 2021 03:54:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5050 Thu 13 May 2021 03:50:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:21326 Thu 13 May 2021 03:05:11 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4899 Thu 13 May 2021 02:49:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5055 Thu 13 May 2021 02:32:25 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4946 Thu 13 May 2021 02:23:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5053 Thu 13 May 2021 02:16:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5061 Thu 13 May 2021 01:52:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5085 Thu 13 May 2021 01:29:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4913 Thu 13 May 2021 01:27:10 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:21133 Thu 13 May 2021 01:17:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5060 Thu 13 May 2021 01:16:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5094 Thu 13 May 2021 01:06:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4998 63% Fe. Deposits of Zimbabwe have more than 33 000 Mt of beneficiable iron-formation. The evaluation of an iron ore prospect involves many factors which must be individually assessed in order to arrive at an estimate of the probable profitability of the deposit. Many of these are geological and are inherent in the deposit itself. Other factors are inherent aspects of the environment in which the ore is formed. Although the geological character of the ore does not change, technological advances in the processing techniques may have a great effect on the cost of putting the ore into marketable form. Geochemical, geophysical and remote sensing methods would be used for regional exploration. Chip sampling and drilling are useful for detailed exploration. Purely geological exploration techniques are applicable on a prospect scale in the exploration of iron ore deposits. Regional exploration targeting should choose late Archaean greenstone belts containing oxide facies iron-formation or Early Proterozoic basins located at craton margins as they are both known to host high-grade haematite orebodies formed by supergene/hypogene enrichment. Most types of iron ore deposits in southern Africa are described and classified. An attempt is made to emphasize the major controls on mineralisation, in the hope that these may be applicable to exploration both in the southern African region and within analogous settings around the world.]]> Thu 13 May 2021 00:57:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4964 0.60) and are poorly mineralized. The low D-values «0.40) of the well mineralized vein systems reflect the higher degree of fracture connectivity. These vein systems were capable of efficiently draining and localizing large volumes of mineralizing fluids from crustal-scale structures. A metamorphic devolatization model is proposed where the entire Damaran metasedimentary and meta-volcanic package is seen as a large source area of very low concentrations of Cu, Au and other metals. Localization of deformation into crustal-scale faults and shear zones led to regional-scale hydrothermal fluid flow and focussing into the upstream fracture networks of the Onguati study area. Strong mineralization resulted when fluids encountered the reactive marble lithologies]]> Thu 13 May 2021 00:43:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5022 Thu 13 May 2021 00:43:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5027 Thu 13 May 2021 00:36:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4943 Thu 13 May 2021 00:25:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:26021 Thu 13 May 2021 00:03:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:72169 Sat 20 Apr 2024 19:47:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:57256 Mon 10 Oct 2022 09:43:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45202 Mon 04 Jul 2022 12:24:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:65357 Mon 03 Jul 2023 10:33:08 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28204 Fri 06 Aug 2021 11:56:45 SAST ]]>