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Zeng Rongsheng
Zeng Rongsheng (; 16 August 1924 – 22 October 2019) was a Chinese geophysicist and earthquake researcher who helped establish the geophysics programs at the China University of Geosciences (Beijing), Peking University, and the University of Science and Technology of China. He investigated the crustal structures of many locations in China and their relations to earthquakes. Considered a founder of solid earth geophysics in the country, he was elected an academician of the Chinese Academy of Sciences in 1980. Life and career Zeng was born on 16 August 1924 in Fuqing, Fujian, Republic of China, with his ancestral home in Pingtan County. After graduating from Xiamen University in July 1946, he was hired by the university as a teaching assistant. In September 1947, Zeng joined the Institute of Physics of the National Peiping Academy in Beiping (now Beijing) as an assistant researcher. He joined the Institute of Geophysics of the Chinese Academy of Sciences in 1950 as an assista ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeng (surname)
Zeng (, ) is a Chinese family name. In Cantonese, it is Tsang; In Wade–Giles, such as those in Taiwan, Tseng or Tzeng; in Malaysia and Singapore, Tsen, Chen or Cheng; in the Philippines, Chan; in Indonesia, Tjan; in Vietnam, Tăng. The surname Zeng is the 32nd most common surname in mainland China as of 2019. It is the 16th most common surname in Taiwan. It meant "high" or "add" in ancient Chinese.The Oxford Dictionary of Family Names in Britain and Ireland Zeng was listed 385th on the ''Hundred Family Surnames''. Zeng or von Zeng is also a German family name with other origins f.e. the nobles ''De Zeng'' or ''von Zenge''. Origin The surname originates from () an ancient state located in present-day Cangshan County (now Lanling County) in Shandong province, which was granted to Qu Lie, son of the emperor Shao Kang in the Xia dynasty. The state was annexed by Ju (state), Ju (located mainly in present-day Shandong province) in 567 BC. The crown prince of the state, Wu, fled to L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancestral Home (Chinese)
In Chinese culture, an ancestral home is the place of origin of one's extended family. It may or may not be the place where one is born. For instance, Lien Chan was born in Xi'an, but his ancestral home is Zhangzhou. Definition A subjective concept, a person's ancestral home could be the birthplace of ''any'' of their patriline ancestors. Su Shi limited it to five generations, i.e. it refers to the home of one's great-great-grandfather. Even more broadly, an ancestral home can refer to the first locality where a surname came to be established or prominent. Commonly, a person usually defines their hometown as what their father considers to be his ancestral home. In practice, most people would define their ancestral homes as the birthplace of their patriline ancestors from the early 20th century, around the time when government authorities began to collect such information from individuals. Moreover, a person's ancestral home can be defined in any level of locality, from prov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Characters
Chinese characters are logographs used Written Chinese, to write the Chinese languages and others from regions historically influenced by Chinese culture. Of the four independently invented writing systems accepted by scholars, they represent the only one that has remained in continuous use. Over a documented history spanning more than three millennia, the function, style, and means of writing characters have changed greatly. Unlike letters in alphabets that reflect the sounds of speech, Chinese characters generally represent morphemes, the units of meaning in a language. Writing all of the frequently used vocabulary in a language requires roughly 2000–3000 characters; , nearly have been identified and included in ''The Unicode Standard''. Characters are created according to several principles, where aspects of shape and pronunciation may be used to indicate the character's meaning. The first attested characters are oracle bone inscriptions made during the 13th century&n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Plate
The Indian plate (or India plate) is or was a minor tectonic plate straddling the equator in the Eastern Hemisphere. Originally a part of the ancient continent of Gondwana, the Indian plate broke away from the other fragments of Gondwana and began moving north, carrying Insular India with it. It was once fused with the adjacent Australian plate to form a single Indo-Australian plate, but recent studies suggest that India and Australia may have been separate plates for at least 3 million years. The Indian plate includes most of modern South Asia (the Indian subcontinent) and a portion of the basin under the Indian Ocean, including parts of South China, western Indonesia, and extending up to but not including Ladakh, Kohistan, and Balochistan in Pakistan. Plate movements Until roughly , the Indian plate formed part of the supercontinent, Gondwana, together with modern Africa, Australia, Antarctica, and South America. Gondwana fragmented as these continents drifted apa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tibetan Plateau
The Tibetan Plateau, also known as the Qinghai–Tibet Plateau or Qingzang Plateau, is a vast elevated plateau located at the intersection of Central Asia, Central, South Asia, South, and East Asia. Geographically, it is located to the north of Himalayas and the Indian subcontinent, and to the south of Tarim Basin and Mongolian Plateau. Geopolitically, it covers most of the Tibet Autonomous Region, most of Qinghai, western half of Sichuan, Southern Gansu provinces, southern Xinjiang province in Western China, Bhutan, the Administrative divisions of India, Indian regions of Ladakh and Lahaul and Spiti district, Lahaul and Spiti (Himachal Pradesh) as well as Gilgit-Baltistan in Pakistan, northwestern Nepal, eastern Tajikistan and southern Kyrgyzstan. It stretches approximately north to south and east to west. It is the world's highest and largest plateau above sea level, with an area of . With an average elevation exceeding and being surrounded by imposing mountain ranges that har ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Mantle (Earth)
The upper mantle of Earth is a very thick layer of rock inside the planet, which begins just beneath the crust (at about under the oceans and about under the continents) and ends at the top of the lower mantle the . Temperatures range from approximately at the upper boundary with the crust to approximately at the boundary with the lower mantle. Upper mantle material that has come up onto the surface comprises about 55% olivine, 35% pyroxene, and 5 to 10% of calcium oxide and aluminum oxide minerals such as plagioclase, spinel, or garnet, depending upon depth. Seismic structure The density profile through Earth is determined by the velocity of seismic waves. Density increases progressively in each layer, largely due to compression of the rock at increased depths. Abrupt changes in density occur where the material composition changes. The upper mantle begins just beneath the crust and ends at the top of the lower mantle. The upper mantle causes the tectonic plates to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1976 Tangshan Earthquake
The 1976 Tangshan earthquake () was a 7.6 earthquake that hit the region around Tangshan, Hebei, China, at 3:42 a.m. on 28 July 1976. The maximum intensity of the earthquake was XI (''Extreme'') on the Mercalli intensity scale, Mercalli scale. In minutes, 85 percent of the buildings in Tangshan collapsed or were rendered unusable, all services failed, and most of the highway and railway bridges collapsed or were seriously damaged. The official count stated 242,469 deaths, while historians accepted at least 300,000 died, making it the Lists of earthquakes#Deadliest earthquakes, deadliest earthquake in recorded history (excluding the famine deaths from the 1556 Shanxi earthquake) and one of the worst list of disasters in China by death toll, disasters in China by death toll. Earthquakes The earthquake sequence comprised two shocks with magnitudes of at least 7.0. The first struck at 3:42:55 in the morning (local time), approximately under the southern part of Tangshan.. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extensional Basin
Extensional tectonics is concerned with the structures formed by, and the tectonic processes associated with, the stretching of a planetary body's crust or lithosphere. Deformation styles The types of structure and the geometries formed depend on the amount of stretching involved. Stretching is generally measured using the parameter ''β'', known as the ''beta factor'', where : \beta = \frac \,, ''t''0 is the initial crustal thickness and ''t''1 is the final crustal thickness. It is also the equivalent of the strain parameter ''stretch''. Low beta factor In areas of relatively low crustal stretching, the dominant structures are high to moderate angle normal faults, with associated half grabens and tilted fault blocks. High beta factor In areas of high crustal stretching, individual extensional faults may become rotated to too low a dip to remain active and a new set of faults may be generated. Large displacements may juxtapose syntectonic sediments against metamorphic r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geodynamics
Geodynamics is a subfield of geophysics dealing with dynamics of the Earth. It applies physics, chemistry and mathematics to the understanding of how mantle convection leads to plate tectonics and geologic phenomena such as seafloor spreading, mountain building, volcanoes, earthquakes, faulting. It also attempts to probe the internal activity by measuring magnetic fields, gravity, and seismic waves, as well as the mineralogy of rocks and their isotopic composition. Methods of geodynamics are also applied to exploration of other planets. Overview Geodynamics is generally concerned with processes that move materials throughout the Earth. In the Earth's interior, movement happens when rocks melt or deform and flow in response to a stress field.Turcotte, D. L. and G. Schubert (2014). "Geodynamics." This deformation may be brittle, elastic, or plastic, depending on the magnitude of the stress and the material's physical properties, especially the stress relaxation time ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qaidam Basin
The Qaidam, Tsaidam, or Chaidamu Basin is a hyperarid basin that occupies a large part of Haixi Prefecture in Qinghai Province, China. The basin covers an area of approximately , one-fourth of which is covered by saline lakes and playas. Around one third of the basin, about , is desert. Name ''Tshwa'i 'Dam'' is the Wylie romanization of the Tibetan name , meaning "Salt Marsh"; the Tibetan Pinyin romanization of the same name is ''Caidam''. ''Qaidam'' is the GNC romanization of its transcription into Mongolian; ''Tsaidam'' is a variant romanization of the same name. ''Chaidamu'' is the pinyin romanization of its transcription into Chinese characters; the same name was formerly romanized as the for the Chinese Postal Map. Geography Orographically, the Qaidam Basin is a comparatively low area in the northeastern part of the Qinghai–Tibet Plateau.. With an elevation of around , Qaidam forms a kind of shelf between Tibet to the south (around ) and Gansu to the north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismic Wave
A seismic wave is a mechanical wave of acoustic energy that travels through the Earth or another planetary body. It can result from an earthquake (or generally, a quake), volcanic eruption, magma movement, a large landslide and a large man-made explosion that produces low-frequency acoustic energy. Seismic waves are studied by seismologists, who record the waves using seismometers, hydrophones (in water), or accelerometers. Seismic waves are distinguished from seismic noise (ambient vibration), which is persistent low-amplitude vibration arising from a variety of natural and anthropogenic sources. The propagation velocity of a seismic wave depends on density and elasticity of the medium as well as the type of wave. Velocity tends to increase with depth through Earth's crust and mantle, but drops sharply going from the mantle to Earth's outer core. Earthquakes create distinct types of waves with different velocities. When recorded by a seismic observatory, their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
