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Koidu Holdings
Koidu Limited a subsidiary of OCTÉA Limited, is a locally registered Company in the Republic of Sierra Leone. History Formation After a JV was formed on 1 June 2002 Koidu Limited acquired the remainder of the 25-year mining lease agreement originally signed in 1995. After the second successful post-war democratic election in 2007, the Government of Sierra Leone undertook to review all mining agreements in the country. The Mining Review Process commenced in July 2008 and Koidu Limited’s mining lease for the Koidu Kimberlite Project was one of the first to be reviewed. A new mining lease agreement was entered into between the Republic of Sierra Leone and Koidu Limited on 6 September 2010. The term of the mining lease was extended to 22 July 2030 and may be renewed for a further period of 15 years. Initial Operations After the end of the civil war in Sierra Leone in 2002 – and once the country had joined as a participant of the Kimberley Process Certification Sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freetown, Sierra Leone
Freetown is the capital and largest city of Sierra Leone. It is a major port city on the Atlantic Ocean and is located in the Western Area of the country. Freetown is Sierra Leone's major urban, economic, financial, cultural, educational and political centre, as it is the seat of the Government of Sierra Leone. The population of Freetown was 1,055,964 at the 2015 census. The city's economy revolves largely around its harbour, which occupies a part of the estuary of the Sierra Leone River in one of the world's largest natural deep water harbours. Although the city has traditionally been the homeland of the Sierra Leone Creole people, the population of Freetown is ethnically, culturally, and religiously diverse. The city is home to a significant population of all of Sierra Leone's ethnic groups, with no single ethnic group forming more than 27% of the city's population. As in virtually all parts of Sierra Leone, the Krio language of the Sierra Leone Creole people is Freetown's pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra Leone Civil War
The Sierra Leone Civil War (1991–2002), or the Sierra Leonean Civil War, was a civil war in Sierra Leone that began on 23 March 1991 when the Revolutionary United Front (RUF), with support from the special forces of Liberia, Liberian dictator Charles Taylor (Liberian politician), Charles Taylor's National Patriotic Front of Liberia (NPFL), intervened in Sierra Leone in an attempt to overthrow the Joseph Momoh government. The resulting civil war lasted 11 years, enveloped the country, and left over 50,000 dead.Gberie, p. 6 During the first year of the war, the RUF took control of large swathes of territory in eastern and southern Sierra Leone, which were rich in alluvial diamonds. The government's ineffective response to the RUF, and the disruption in government diamond production, precipitated a military ''coup d'état'' in April 1992 by the National Provisional Ruling Council (NPRC).Gberie, p. 103 By the end of 1993, the Republic of Sierra Leone Armed Forces, Sierra Leone Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kimberley Process Certification Scheme
The Kimberley Process Certification Scheme (KPCS) is the process established in 2003 to prevent "conflict diamonds" from entering the mainstream rough diamond market by United Nations General Assembly Resolution 55/56 following recommendations in the Fowler Report. The process was set up "to ensure that diamond purchases were not financing violence by rebel movements and their allies seeking to undermine legitimate governments." The effectiveness of the process has been brought into question by organizations such as Global Witness (pulled out of the scheme on 5 December 2011) and IMPACT (pulled out on 14 December 2017), claiming it has failed in its purpose and does not provide markets with assurance that the diamonds are not conflict diamonds. Organizations such as Human Rights Watch have also argued that the Kimberley Process is too narrow in scope and does not adequately serve to eliminate other human rights concerns from the diamond production chain. History The United Nati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Koidu Cotton Tree
Koidu Town (or Sefadu) is the capital and largest city of the diamond-rich Kono District in the Eastern Province of Sierra Leone. The population of Koidu Town is 124,6based on the 2015 Sierra Leone national census. Koidu Town is the fifth largest city in Sierra Leone by population, after Freetown, Kenema, Bo and Makeni. Koidu Town is a major urban, business, commercial and diamond trade center. Koidu Town lies approximately 280 miles east of Freetown, and about 60 miles north of Kenema. Two of the world’s ten largest and most famous rough diamonds were found in the Woyie River that flows through Koidu Town. The city is officially known as Koidu City. The mayor of Koidu City and members of the Koidu-New Sembehun city council are directly elected every four years by the residents of Koidu. The current mayor of Koidu Town is Komba Sam of the Coalition 4 Change Politically, Kodu Town is not a stronghold of any political party, as the city is home to a significantly large su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kono District
Kono District is a district in the Eastern Province of Sierra Leone. Its capital and largest city is Koidu, Koidu Town. Motema is the second most populous city in the district. The other major towns in the district include Yengema, Tombodu, Jaiama Nimikor and Sewafe. The district is the largest diamond producer in Sierra Leone. The population of Kono District is 505,767. Kono District borders Kenema District to the southwest, The Republic of Guinea to the east, Koinadugu District to the northeast and Kailahun District to the southeast. Kono District is divided into fourteen chiefdoms. Kono District is one of the most ethnically diverse Districts in Sierra Leone and is home to a large population of many of Sierra Leone's ethnic groups, with no single ethnic group forming a majority. Kono District population is religiously diverse among Muslims and Christians, though Muslims make up the majority of the population in Kono District. Before the civil war, Kono District had a po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kimberlite Pipes
Volcanic pipes or volcanic conduits are subterranean geological structures formed by the violent, supersonic eruption of deep-origin volcanoes. They are considered to be a type of ''diatreme''. Volcanic pipes are composed of a deep, narrow cone of solidified magma (described as "carrot-shaped"), and are usually largely composed of one of two characteristic rock types — kimberlite or lamproite. These rocks reflect the composition of the volcanoes' deep magma sources, where the Earth is rich in magnesium. Volcanic pipes are relatively rare. They are well known as the primary source of diamonds, and are mined for this purpose. Formation Volcanic pipes form as the result of violent eruptions of deep-origin volcanoes. These volcanoes originate at least three times as deep as most other volcanoes, and the resulting magma that is pushed toward the surface is high in magnesium and volatile compounds such as water and carbon dioxide. As the body of magma rises toward the surface, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dike (geology)
A dike or dyke, in Geology, geological usage, is a sheet of rock that is formed in a Fracture (geology), fracture of a pre-existing rock body. Dikes can be either Intrusive rock, magmatic or Sedimentary rock, sedimentary in origin. Magmatic dikes form when magma flows into a crack then solidifies as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock. Clastic dikes are formed when sediment fills a pre-existing crack.Essentials of Geology, 3rd Ed, Stephen Marshak Magmatic dikes A magmatic dike is a sheet of igneous rock that cuts across older rock beds. It is formed when magma fills a fracture in the older beds and then cools and solidifies. The dike rock is usually more resistant to weathering than the surrounding rock, so that erosion exposes the dike as a natural wall or ridge. It is from these natural walls that dikes get their name. Dikes preserve a record of the fissures through which most mafic magma (fluid magma low in silica) reac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feasibility Study
A feasibility study is an assessment of the practicality of a project or system. A feasibility study aims to objectively and rationally uncover the strengths and weaknesses of an existing business or proposed venture, opportunities and threats present in the natural environment, the resources required to carry through, and ultimately the prospects for success.Justis, R. T. & Kreigsmann, B. (1979). The feasibility study as a tool for venture analysis. ''Business Journal of Small Business Management'' 17 (1) 35-42. In its simplest terms, the two criteria to judge feasibility are cost required and value to be attained. A well-designed feasibility study should provide a historical background of the business or project, a description of the product or service, accounting statements, details of the operations and management, marketing research and policies, financial data, legal requirements and tax obligations. Generally, feasibility studies precede technical development and project ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Pit
Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, is a surface mining technique of extracting rock or minerals from the earth from an open-air pit, sometimes known as a borrow. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface. It is applied to ore or rocks found at the surface because the overburden is relatively thin or the material of interest is structurally unsuitable for tunnelling (as would be the case for cinder, sand, and gravel). In contrast, minerals that have been found underground but are difficult to retrieve due to hard rock, can be reached using a form of underground mining. To create an open-pit mine, the miners must determine the information of the ore that is underground. This is done through drilling of probe holes in the ground, then plotting eac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underground Mining
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
