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Chilung Volcano Group
The Chilung Volcanoes () are a group of extinct volcanoes located in northern Taiwan, lying to the east of Taipei and Keelung (Chilung), and adjoining the northern coast of the island of Taiwan. Together with Mount Guanyin and the Tatun Volcano Group, it belongs to the northern Taiwan volcanic province, constituting the western end of the island chains of the Ryukyu arc. Five separate bodies can be distinguished: Chilungshan (Mount Keelung), Penshan, Wutanshan, Tsaoshan and Chimuling. The group is mainly composed of andesite, although there is some heterogeneity caused by the mixing between mantle-derived and continental material. Aging of andesite, biotite, and zircon samples have yielded age estimates between 0.8 and 1.7 Ma. It comprises the largest gold-copper deposits of Taiwan. See also * Ruifang, Taipei *Jiufen Jiufen, also spelled Jioufen or Chiufen (), is a seaside mountain area in Ruifang District, New Taipei City, Taiwan. History During the first years of the Qin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruifang District
Ruifang District () is a suburban district in eastern New Taipei City, Taiwan. History During Japanese rule, Ruifang was called , and was administered as part of of Taihoku Prefecture. Mining was an important industry in Ruifang (then known as ''Sui-hong'') in the early 20th century. Gold was mined in Kyūfun and Kinkaseki while coal was mined in ''Kau-tong'' ( 猴硐; ''Houtong''). After the handover of Taiwan from Japan to the Republic of China in 1945, Ruifang was organized as an urban township of Taipei County. The mining sites became popular tourist destinations after 1990. On 25 December 2010, Taipei County was upgraded into a municipality named New Taipei City and Ruifang became a district of the municipality. In March 2012, it was named one of the ''Top 10 Small Tourist Towns'' by the Tourism Bureau. Administrative divisions There are thirty-four urban villages in the district which are divided between four election districts: *Election District One **Longtan ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andesite
Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Martian crust. The name ''andesite'' is derived from the Andes mountain range, where this rock type is found in abundance. It was first applied by Christian Leopold von Buch in 1826. Description Andesite is an aphanitic (fine-grained) igneous rock that is intermediate in its content of silica and low in alkali metals. It has less than 20% quartz and 10% feldspathoid by volume, with at least 65% of the fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of New Taipei
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jiufen
Jiufen, also spelled Jioufen or Chiufen (), is a seaside mountain area in Ruifang District, New Taipei City, Taiwan. History During the first years of the Qing Dynasty, the isolated village housed nine families, thus the village would request "nine portions" every time shipments arrived from town. Later ''Káu-hūn-á'' () would become the name of the village. Despite the earliest reference to the production of gold in the island dating to 1430, and multiple rediscoveries by early inhabitants, visiting Japanese, Dutch occupiers, and Koxinga's retainers, awareness of the wealth of Taiwan's gold districts did not develop until the late Qing era. In 1890, workmen discovered flakes of gold while constructing the new Taipeh-Kelung railway, and in 1893 a rich placer district was discovered in the hills of ''Kau-hun'' that produced several kilograms of gold a day. In the next year, the promise became greater than ever after a Chinese "expert" with experience gained in California foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruifang, Taipei
Ruifang District () is a suburban district in eastern New Taipei City, Taiwan. History During Japanese rule, Ruifang was called , and was administered as part of of Taihoku Prefecture. Mining was an important industry in Ruifang (then known as ''Sui-hong'') in the early 20th century. Gold was mined in Kyūfun and Kinkaseki while coal was mined in ''Kau-tong'' ( 猴硐; ''Houtong''). After the handover of Taiwan from Japan to the Republic of China in 1945, Ruifang was organized as an urban township of Taipei County. The mining sites became popular tourist destinations after 1990. On 25 December 2010, Taipei County was upgraded into a municipality named New Taipei City and Ruifang became a district of the municipality. In March 2012, it was named one of the ''Top 10 Small Tourist Towns'' by the Tourism Bureau. Administrative divisions There are thirty-four urban villages in the district which are divided between four election districts: *Election District One **Longtan ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deposition (geology)
Deposition is the geological process in which sediments, soil and rocks are added to a landform or landmass. Wind, ice, water, and gravity transport previously weathered surface material, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment. Deposition occurs when the forces responsible for sediment transportation are no longer sufficient to overcome the forces of gravity and friction, creating a resistance to motion; this is known as the null-point hypothesis. Deposition can also refer to the buildup of sediment from organically derived matter or chemical processes. For example, chalk is made up partly of the microscopic calcium carbonate skeletons of marine plankton, the deposition of which has induced chemical processes (diagenesis) to deposit further calcium carbonate. Similarly, the formation of coal begins with the deposition of organic material, mainly from plants, in anaerobic conditions. Null-point hypothesis The null ... [...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] |
Zircon
Zircon () is a mineral belonging to the group of nesosilicates and is a source of the metal zirconium. Its chemical name is zirconium(IV) silicate, and its corresponding chemical formula is Zr SiO4. An empirical formula showing some of the range of substitution in zircon is (Zr1–y, REEy)(SiO4)1–x(OH)4x–y. Zircon precipitates from silicate melts and has relatively high concentrations of high field strength incompatible elements. For example, hafnium is almost always present in quantities ranging from 1 to 4%. The crystal structure of zircon is tetragonal crystal system. The natural color of zircon varies between colorless, yellow-golden, red, brown, blue, and green. The name derives from the Persian ''zargun'', meaning "gold-hued". This word is corrupted into "jargoon", a term applied to light-colored zircons. The English word "zircon" is derived from ''Zirkon'', which is the German adaptation of this word. Yellow, orange, and red zircon is also known as "hyacinth", ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biotite
Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula . It is primarily a solid-solution series between the iron-endmember annite, and the magnesium-endmember phlogopite; more aluminous end-members include siderophyllite and eastonite. Biotite was regarded as a mineral ''species'' by the International Mineralogical Association until 1998, when its status was changed to a mineral ''group''. The term ''biotite'' is still used to describe unanalysed dark micas in the field. Biotite was named by J.F.L. Hausmann in 1847 in honor of the French physicist Jean-Baptiste Biot, who performed early research into the many optical properties of mica. Members of the biotite group are sheet silicates. Iron, magnesium, aluminium, silicon, oxygen, and hydrogen form sheets that are weakly bound together by potassium ions. The term "iron mica" is sometimes used for iron-rich biotite, but the term also refers to a flaky micaceous form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mantle (geology)
A mantle is a layer inside a planetary body bounded below by a Planetary core, core and above by a Crust (geology), crust. Mantles are made of Rock (geology), rock or Volatiles, ices, and are generally the largest and most massive layer of the planetary body. Mantles are characteristic of planetary bodies that have undergone planetary differentiation, differentiation by density. All Terrestrial planet, terrestrial planets (including Earth), a number of Asteroid, asteroids, and some planetary Natural satellite, moons have mantles. Earth's mantle The Earth's mantle is a layer of Silicate minerals, silicate rock between the Crust (geology), crust and the Earth's outer core, outer core. Its mass of 4.01 × 1024 kg is 67% the mass of the Earth. It has a thickness of making up about 84% of Earth's volume. It is predominantly solid, but in Geologic time scale, geological time it behaves as a Viscosity, viscous fluid. Partial melting of the mantle at mid-ocean ridges produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Province
A geologic province is a spatial entity with common geologic attributes. A province may include a single dominant structural element such as a basin or a fold belt, or a number of contiguous related elements. Adjoining provinces may be similar in structure but be considered separate due to differing histories. Geologic provinces by origin Geologic provinces by resources Some studies classify provinces based upon mineral resources, such as mineral deposits. There are a particularly large number of provinces identified worldwide for petroleum and other mineral fuels, such as the Niger Delta petroleum province. See also * Physiographic province * Geomorphology * United States Geological Survey The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, ... References * External link ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Taipei City
New Taipei City is a special municipality located in northern Taiwan. The city is home to an estimated population of 3,974,683 as of 2022, making it the most populous city of Taiwan, and also the second largest special municipality by area, behind Kaohsiung. New Taipei City neighbours Keelung to the northeast, Yilan County to the southeast, and Taoyuan to the southwest, and completely encloses the city of Taipei. Banqiao District is its municipal seat and biggest commercial area. Before the Spanish and Dutch started arriving in Taiwan and set up small outposts in Tamsui in 1626, the area of present-day New Taipei City was mostly inhabited by Taiwanese indigenous peoples, mainly the Ketagalan people. From the late Qing era, the port of Tamsui was opened up to foreign traders as one of the treaty ports after the Qing dynasty of China signed the Treaty of Tianjin in June 1858. By the 1890s, the port of Tamsui accounted for 63 percent of the overall trade for entire Taiwan, po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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