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Martabe Mine
The Martabe mine is a open pit mine that is one of the largest gold mines in western Sumatra island, Indonesia and in the world. This mine also mines silver. The Martable mine will continued to be mined unit 2032. In 2022, various processing plant facilities were added and refined to support world-class gold and silver mining operations. It produces 250,000 oz of gold per annum. Background The mine is located in the west of the country in North Sumatra. The mine has measured reserves (as of 31 December 2013) of 3.0 million oz of gold and 31.9 million oz of silver; these reserves are included in mineral resources (that may or may not be economic to mine) of 8.1 million oz of gold and 73.8 million oz of silver.Link text additional text. Engineering, procurement, and construction managemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sumatra
Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent islands such as the Simeulue, Nias, Mentawai, Enggano, Riau Islands, Bangka Belitung and Krakatoa archipelago. Sumatra is an elongated landmass spanning a diagonal northwest–southeast axis. The Indian Ocean borders the northwest, west, and southwest coasts of Sumatra, with the island chain of Simeulue, Nias, Mentawai, and Enggano off the western coast. In the northeast, the narrow Strait of Malacca separates the island from the Malay Peninsula, which is an extension of the Eurasian continent. In the southeast, the narrow Sunda Strait, containing the Krakatoa Archipelago, separates Sumatra from Java. The northern tip of Sumatra is near the Andaman Islands, while off the southeastern coast lie the islands of Bangka and Belitung, Karim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guinea. Indonesia is the world's largest archipelagic state and the 14th-largest country by area, at . With over 275 million people, Indonesia is the world's fourth-most populous country and the most populous Muslim-majority country. Java, the world's most populous island, is home to more than half of the country's population. Indonesia is a presidential republic with an elected legislature. It has 38 provinces, of which nine have special status. The country's capital, Jakarta, is the world's second-most populous urban area. Indonesia shares land borders with Papua New Guinea, East Timor, and the eastern part of Malaysia, as well as maritime borders with Singapore, Vietnam, Thailand, the Philippines, Australia, Palau, and India ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Sumatra
North Sumatra ( id, Sumatra Utara) is a province of Indonesia located on the northern part of the island of Sumatra. Its capital and largest city is Medan. North Sumatra is Indonesia's fourth most populous province after West Java, East Java and Central Java, and also the most populous in the island of Sumatra. It covers an area of 72,981 km2. According to the 2020 census, the province's population in that year was 14,799,361. The mid-2021 official estimate is 14,936,148. North Sumatra is a multi-ethnic province. The Malay people are regarded as the natives of the east coast of the province, while the west coast of the province is mainly inhabited by the Batak (''Pakpak'', ''Angkola'' and ''Mandailing'' groups). The central highlands region around Lake Toba is predominantly inhabited by another ''Batak'' groups (''Toba'', ''Simalungun'' and ''Karo''). The Nias people are natives to ''Nias Island'' and its surrounding islets. With the opening of tobacco plantations in East S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental ( native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver
Silver is a chemical element with the Symbol (chemistry), symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc Refining (metallurgy), refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes bimetallism, alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental ( native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes, and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth's liquid outer core generates the magnetic field that shapes the magnetosphere of the Earth, deflecting destructive solar winds. The atmosphere of the Earth consists mostly of nitrogen and oxygen. Greenhouse gases in the atmosphere like carbon dioxide (CO2) trap a part of the energy from the Sun close to the surface. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. More solar e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Year
A year or annus is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons are generally recognized: spring, summer, autumn and winter. In tropical and subtropical regions, several geographical sectors do not present defined seasons; but in the seasonal tropics, the annual wet and dry seasons are recognized and tracked. A calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar. The Gregorian calendar, or modern calendar, presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars. For the Gregorian calendar, the average length of the calendar year (t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ausenco
Ausenco Limited is a multinational engineering, procurement, construction management, and operations service provider to the energy and resources sectors. Its head office is in Brisbane, Australia. The company name is an amalgamation of "Australian Engineering Company". History Ausenco was founded in Brisbane, Australia, in 1991, by Albanian Australian Zimi Meka, current CEO and Managing Director, and Bob Thorpe, current Board member. Four years later, in 1995, the second office opened in Perth, Australia. In 2002, the first institutional shareholders invested in Ausenco and former Queensland Premier Wayne Goss was appointed Chairman of the company. Ausenco established the Ascentis division in 2003 to deliver operations solutions to the minerals processing industry. In 2004, Ausenco opened an office in China, and then in 2005, opened offices in North America and South America. The company listed on the Australian stock exchange on 15 June 2006. In 2007, the Vancouver office o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Tractors
PT United Tractors Tbk or United Tractors (UT/the Company) is a company that was established on 13 October 1972 as the exclusive distributor of Komatsu Limited heavy equipment in Indonesia. On 19 September 1989, the company went public and listed its shares in Indonesia Stock Exchange under UNTR ticker symbol, with Astra International as the majority shareholder. The company is also the exclusive distributor of UD Trucks, Bomag, Tadano and Scania AB. Aside of being the largest distributor of heavy equipment in the country, the company also plays an active role in the field of mining contracting and has recently ventured into coal and gold mining businesses. Through its subsidiaries, the company owns and operates several coal mines of 400 million tons combined reserve and one of the largest gold mines in the world, Martabe mine. The three major business units are Construction Machinery, Mining Contracting and Mining. The portfolio of these three business units are prudently man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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