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Chilung Volcanic Group
The Chilung Volcanic Group or Keelung Volcanic Group () is 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 Volcanic 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. Jiufen Ol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruifang District
Ruifang District () is a suburban District (Taiwan), district in eastern New Taipei City, Taiwan. History During Taiwan under Japanese rule, 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 Jiufen, Kyūfun and Jinguashi, Kinkaseki while coal was mined in ''Kau-tong'' (:zh:猴硐, 猴硐; ''Houtong''). After the History of Taiwan since 1945, handover of Taiwan from Japan to the Republic of China (1912–1949), Republic of China in 1945, Ruifang was organized as an Township (Taiwan), urban township of Taipei County. The mining sites became popular tourist destinations after 1990. On 25 December 2010, Taipei County was upgraded into a Special municipality (Taiwan), 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'' b ... [...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 Geology of Mars, 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) to porphyritic (coarse-grained) igneous rock that is intermediate in its content of silica and low in alkali metals. It has less than 20% quartz and 10% feldspa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of New Taipei
A landform is a land feature on the solid surface of the Earth or other planetary body. They may be natural or may be anthropogenic (caused or influenced by human activity). 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 oceanic basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, structure stratification, rock exposure, and soil type. Gross physical features or landforms include intuitive elements such as berms, cliffs, hills, mounds, peninsulas, ridges, rivers, valleys, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodi ... [...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. Jiufen Old Street is a narrow, winding alleyway with shops, teahouses, and restaurants that offers tourists a view of traditional Taiwanese life. 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 Formosa, Dutch occupiers, and Koxinga's retainers, awareness of the wealth of Taiwan's gold districts did not develop until the late Taiwan under Qing rule, Qing era. In 1890, workmen discovered flakes of gold while constructing the new Taipei-Keelung railway, and in 1893 a rich Placer mining, placer district was discover ... [...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 rock (geology), rocks are added to a landform or landmass. Wind, ice, water, and gravity Transportation (sediment), transport previously Weathering, weathered surface material, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment. This 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 Organic matter, 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 induced chemical processes (diagenesis) to deposit further calcium carbonate. Similarly, the formation of coal begins with the deposition of organic material, mainly from plants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Year
A year is a unit of time based on how long it takes the Earth to orbit the Sun. In scientific use, the tropical year (approximately 365 Synodic day, solar days, 5 hours, 48 minutes, 45 seconds) and the sidereal year (about 20 minutes longer) are more exact. The modern calendar year, as reckoned according to the Gregorian calendar, approximates the tropical year by using a system of leap years. The term 'year' is also used to indicate other periods of roughly similar duration, such as the lunar year (a roughly 354-day cycle of twelve of the Moon's phasessee lunar calendar), as well as periods loosely associated with the calendar or astronomical year, such as the seasonal year, the fiscal year, the academic year, etc. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by changes in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar climate, subpolar regions around the planet, four ... [...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 changed 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 " hyacint ... [...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 micace ... [...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 Volatile (astrogeology), 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), half of the giant planets, specifically ice giants, a number of Asteroid, asteroids, and some planetary Natural satellite, moons have mantles. Examples Earth 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, visc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Province
A geologic province or geological 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), founded as the Geological Survey, is an agency of the U.S. Department of the Interior whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on Mar ... Refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Taipei City
New Taipei City is a Special municipality (Taiwan), special municipality located in regions of Taiwan, northern Taiwan. The city is home to an estimated population of 4,004,367 as of January 2023, making it the most populous city in Taiwan, and also the second largest special municipality by area, behind Kaohsiung. The top-level Administrative divisions of Taiwan, administrative divisions bordering New Taipei City are Keelung to the northeast, Yilan County, Taiwan, Yilan County to the southeast, and Taoyuan City, Taoyuan to the southwest, and it completely encloses the city of Taipei. Banqiao District is its municipal seat and biggest commercial area. Before the establishment of Spanish Formosa, Spanish and Dutch Formosa, Dutch 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 Taiwan under Qing rule, late Qing era, the Tamsui Customs Wharf, port of Tamsui was opened u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
