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Hosokura Mine
The was one of the largest lead and zinc mines in Japan. The mine was located in the town of Uguisuzawa, Miyagi Prefecture in the Tohoku region of northern Japan, in what is now the city of Kurihara. The mine had production of 26 million tonnes of ore grading 1.59% lead, 4.12% zinc and 12.8 million oz of silver before closing in 1987. Background The Hosokura mine was located in the Ōu Mountains the northwest part of Miyagi prefecture. The mine extended for about 5 kilometers east-west and about 3 kilometers north and south and had ten major veins and over 150 minor veins of mineral deposits, with the vein width ranging from 12 meters to 15 meters at maximum, but on average 1.3 meters. Major minerals include galena, zinc blende and pyrite, along with smaller amounts of silver, copper, bismuth, cadmium, and gold. History According to tradition, the mine was discovered in the 9th century, making it one of the oldest in Japan. However, historical records are almost non-existent unt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kurihara, Miyagi
Kurihara City Hall is a city located in Miyagi Prefecture, Japan. , the city had an estimated population of 66,565, and a population density of 83 persons per km2 in 24,994 households. The total area of the city is . Parts of the city are within the borders of the Kurikoma Quasi-National Park. Geography Kurihara covers a part of the northwestern corner of Miyagi Prefecture. It is mostly rice farmland, and small mountain ridges, the largest of which cluster around Mount Kurikoma, the tallest mountain in Kurihara, which is located at the furthest northwestern point of Miyagi Prefecture. In summer, the lotus on Lake Izunuma bloom. In fall, Mount Kurikoma is covered in fall colors and in winter migrating swans and geese come in flocks to spend the season on Kurihara's lakes. Neighboring municipalities Miyagi Prefecture * Tome * Ōsaki Akita Prefecture * Yuzawa * Higashinaruse Iwate Prefecture *Ichinoseki Climate The climate of Kurihara is classified as humid subtropical (Cfa) per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead And Zinc Mines In Japan
Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the group, lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
