The NEE\|striking Altyn Tagh Fault (ATF) has been well known as one major point to know the growth history of the Tibetan plateau. Lots of investigations done since 1970’s were mostly focus on active features, partic...The NEE\|striking Altyn Tagh Fault (ATF) has been well known as one major point to know the growth history of the Tibetan plateau. Lots of investigations done since 1970’s were mostly focus on active features, particularly on determining slip, slip rate and their distribution along the fault. However, Cenozoic slip\|history of this fault remains poorly understood, and the age of initiation and total offset are controversial. Several Cenozoic sedimentary basins develop in Suo’erkulinan to Mangya regions (Fig.1). Their sedimentary processes are closely related with the ATF. The studies of the Neogene sedimentary sequences and the reconstruction of the paleo\|geography are essential to establish the displacement history of the fault during Late Cenozoic.Located at the southern side of the ATF, the Suo’erkulinan basin consists of more than 600\|meter\|thick Pliocene Shizigou Formation below and about 120\|meter\|thick Early to Middle Pleistocene Qigequan Formation above according to the 1∶200000 geological map by Xinjiang Province. An obvious erosional surface can be seen on the top of the lower sequence. Sediments in the Shizigou Formation are characterized by 400\|meter\|thick yellow to red cobble\|sized conglomerates in the bottom, up\|grading to sandstones and grey\|green mudstones. This indicated that the sedimentary facies changed from alluvial fan to fluvial fan and sediments became more and more mature. The upper sequence, the Qigequan Formation, corresponds to an alluvial facies series composed of yellow to white cobble\|sized conglomerates intercalated with lenticular sandstones. Paleo\|current indicators showed that the Shizhigou conglomeratic series were sourced from northwest. Well\|developed syn\|sedimentary faults, normal faults mostly inherited from syn\|sedimentary faults, and some striation lineations on the surface indicated transtensional tectonic environment of the strike\|slip faulting.展开更多
The distribution and formation mechanisms of typical identified seismites are analyzed based on various factors from plate tectonic positions, types of sedimentary basins and properties of seismogenic faults to focal ...The distribution and formation mechanisms of typical identified seismites are analyzed based on various factors from plate tectonic positions, types of sedimentary basins and properties of seismogenic faults to focal mechanisms.Especially, structural styles, reserved positions, activity times, formation mechanisms and dynamics of soft-sediment deformation structures triggered by seismic activity are systematically analyzed.According to the genetic types of seismites, we propose 5 categories, including liquefied deformation, thixotropic deformation, hydroplastic deformation, superimposed gravity driving deformation and brittle deformation.Further, based on the main genetic types, composition of sediments and deformation styles, we draw up 35 secondary classifications.To determine paleo-seismic sequences in different times, activities of seismogenic faults, high-resolution tectonic events in one main tectonic movement and paleo-tectonic settings, and to understand the inducing mechanisms of paleo-earthquakes and ecologic environment evolution, researching on seismites are of great significance.Combing multiple approaches to identify the paleoearthquake records, simulating experiments on various soft-sediment deformation structures triggered by different magnitudes of shocking, dating precisely on paleo-seismic events, impacting on paleogeography and biological environment and on energy and resources domain are the frontiers of paleoseismic research.展开更多
The history of the early Earth is shrouded in mystery, and one of the major outcomes of the Apollo Program, lunar sampling, and the data acquired by subsequent orbiting missions, is that the Moon is an important analo...The history of the early Earth is shrouded in mystery, and one of the major outcomes of the Apollo Program, lunar sampling, and the data acquired by subsequent orbiting missions, is that the Moon is an important analogue for the Hadean Earth, which includes primordial planet-forming materials. We assemble two special issues of ＂Geoscience Frontiers＂ with state-of-the-art contributions that provide insights into planetary formation, Earth＇s early history and primordial life. New theories show why the Earth began as a dry planetary system and was later seeded by an ocean-atmosphere system through the bombardment of carbonaceous chondrites. A combination of the information concerning the evolution of Earth, Mars, and the other terrestrial planets is important in understanding the fate of the primordial continental crustal materials and the making of habitable planets.展开更多
The last of the Mohicans was written by American novelist James Fenimore Cooper in 1826,who is considered as the first long novelist of America.The work has no concentrate plots but the white people and the Indians...The last of the Mohicans was written by American novelist James Fenimore Cooper in 1826,who is considered as the first long novelist of America.The work has no concentrate plots but the white people and the Indians'friendship,communication,and wars.The Last of the Mohicans was set in the mid-18th century when the French colonists and English colonists were fighting for Indian lands.English colonized America and were at loggerheads with France.It belongs to the frontier literature and creates a precedent for the American Frontier Fiction.The American western fiction has the most native feature.With the rise of multiculturalism trend at present,it is the best way for understanding the American local culture and history to study the American western fiction which is bred during the course of the frontier-running and Westward Movement.Cooper is a novelist who depicted the real and pure American life.Based on the frontier theme,he created Leatherstocking Tales,which is a series of five novels,are his masterpieces representing his style.Among them,The Last of the Mohicans prominently reflects the Indian culture.This thesis mainly explores the historical and cultural elements embodied in The Last of the Mohicans from the perspective of cross-cultural communication.展开更多
Each nation has its own unique national characters.British are known as conservative,gentlemanlike,reticent,etc.While Americans are thought to be independent,outgoing,optimistic and democratic.A comparative study of t...Each nation has its own unique national characters.British are known as conservative,gentlemanlike,reticent,etc.While Americans are thought to be independent,outgoing,optimistic and democratic.A comparative study of the geographical and historical factors of these two countries will objectively cast a light on the differences of their national characters.展开更多
以国际视野审视教育史研究的发展现状有利于研究者把握该领域的热点、重点与难点。本文以Web of Science为数据源,以2000年1月至2022年9月发表于国际教育史领域的六本期刊的文献为研究数据,绘制国际教育史领域研究的知识图谱,借以探究...以国际视野审视教育史研究的发展现状有利于研究者把握该领域的热点、重点与难点。本文以Web of Science为数据源,以2000年1月至2022年9月发表于国际教育史领域的六本期刊的文献为研究数据,绘制国际教育史领域研究的知识图谱,借以探究国际教育史研究的热点主题、演变特征,并对未来教育史的研究前沿主题进行预测。经分析得出,国际教育史研究的热点主题定位于教师教育、后殖民主义教育、新教育运动;研究的演变特征表征为研究视野由国别史向全球史转向,研究对象向儿童、女性、少数族裔等边缘群体转移,史料观念向大史料观进发;根据模式性变化率、聚类间链接变化率和中心性分散度预测“教育记忆”和“教育博物馆”极易成为未来教育史研究的前沿主题。展开更多
基金theprogramsof ( 1)theYoungGeologistsFoundationoftheMGMR (No .Qn979812 ) ( 2 )theNational(No .G19980 4 0 80 0 ) and ( 3)the
文摘The NEE\|striking Altyn Tagh Fault (ATF) has been well known as one major point to know the growth history of the Tibetan plateau. Lots of investigations done since 1970’s were mostly focus on active features, particularly on determining slip, slip rate and their distribution along the fault. However, Cenozoic slip\|history of this fault remains poorly understood, and the age of initiation and total offset are controversial. Several Cenozoic sedimentary basins develop in Suo’erkulinan to Mangya regions (Fig.1). Their sedimentary processes are closely related with the ATF. The studies of the Neogene sedimentary sequences and the reconstruction of the paleo\|geography are essential to establish the displacement history of the fault during Late Cenozoic.Located at the southern side of the ATF, the Suo’erkulinan basin consists of more than 600\|meter\|thick Pliocene Shizigou Formation below and about 120\|meter\|thick Early to Middle Pleistocene Qigequan Formation above according to the 1∶200000 geological map by Xinjiang Province. An obvious erosional surface can be seen on the top of the lower sequence. Sediments in the Shizigou Formation are characterized by 400\|meter\|thick yellow to red cobble\|sized conglomerates in the bottom, up\|grading to sandstones and grey\|green mudstones. This indicated that the sedimentary facies changed from alluvial fan to fluvial fan and sediments became more and more mature. The upper sequence, the Qigequan Formation, corresponds to an alluvial facies series composed of yellow to white cobble\|sized conglomerates intercalated with lenticular sandstones. Paleo\|current indicators showed that the Shizhigou conglomeratic series were sourced from northwest. Well\|developed syn\|sedimentary faults, normal faults mostly inherited from syn\|sedimentary faults, and some striation lineations on the surface indicated transtensional tectonic environment of the strike\|slip faulting.
基金supported by the Science Research from the work project of China Geological Survey (No.12120115002001, 12120115026901)the Northwest Subcompany of SINOPEC (No: KY2013-S-024)+2 种基金a Special Research Grant from Ministry of Land and Resources of the People’s Republic of China (No.201011034)the Innovation Group of National Natural Science Foundation of China (No.40921001)the open project fund of State Key Laboratory of Continental Tectonics and Dynamics (No.Z1301-A3)
文摘The distribution and formation mechanisms of typical identified seismites are analyzed based on various factors from plate tectonic positions, types of sedimentary basins and properties of seismogenic faults to focal mechanisms.Especially, structural styles, reserved positions, activity times, formation mechanisms and dynamics of soft-sediment deformation structures triggered by seismic activity are systematically analyzed.According to the genetic types of seismites, we propose 5 categories, including liquefied deformation, thixotropic deformation, hydroplastic deformation, superimposed gravity driving deformation and brittle deformation.Further, based on the main genetic types, composition of sediments and deformation styles, we draw up 35 secondary classifications.To determine paleo-seismic sequences in different times, activities of seismogenic faults, high-resolution tectonic events in one main tectonic movement and paleo-tectonic settings, and to understand the inducing mechanisms of paleo-earthquakes and ecologic environment evolution, researching on seismites are of great significance.Combing multiple approaches to identify the paleoearthquake records, simulating experiments on various soft-sediment deformation structures triggered by different magnitudes of shocking, dating precisely on paleo-seismic events, impacting on paleogeography and biological environment and on energy and resources domain are the frontiers of paleoseismic research.
文摘The history of the early Earth is shrouded in mystery, and one of the major outcomes of the Apollo Program, lunar sampling, and the data acquired by subsequent orbiting missions, is that the Moon is an important analogue for the Hadean Earth, which includes primordial planet-forming materials. We assemble two special issues of ＂Geoscience Frontiers＂ with state-of-the-art contributions that provide insights into planetary formation, Earth＇s early history and primordial life. New theories show why the Earth began as a dry planetary system and was later seeded by an ocean-atmosphere system through the bombardment of carbonaceous chondrites. A combination of the information concerning the evolution of Earth, Mars, and the other terrestrial planets is important in understanding the fate of the primordial continental crustal materials and the making of habitable planets.
文摘The last of the Mohicans was written by American novelist James Fenimore Cooper in 1826,who is considered as the first long novelist of America.The work has no concentrate plots but the white people and the Indians'friendship,communication,and wars.The Last of the Mohicans was set in the mid-18th century when the French colonists and English colonists were fighting for Indian lands.English colonized America and were at loggerheads with France.It belongs to the frontier literature and creates a precedent for the American Frontier Fiction.The American western fiction has the most native feature.With the rise of multiculturalism trend at present,it is the best way for understanding the American local culture and history to study the American western fiction which is bred during the course of the frontier-running and Westward Movement.Cooper is a novelist who depicted the real and pure American life.Based on the frontier theme,he created Leatherstocking Tales,which is a series of five novels,are his masterpieces representing his style.Among them,The Last of the Mohicans prominently reflects the Indian culture.This thesis mainly explores the historical and cultural elements embodied in The Last of the Mohicans from the perspective of cross-cultural communication.
文摘Each nation has its own unique national characters.British are known as conservative,gentlemanlike,reticent,etc.While Americans are thought to be independent,outgoing,optimistic and democratic.A comparative study of the geographical and historical factors of these two countries will objectively cast a light on the differences of their national characters.
文摘以国际视野审视教育史研究的发展现状有利于研究者把握该领域的热点、重点与难点。本文以Web of Science为数据源,以2000年1月至2022年9月发表于国际教育史领域的六本期刊的文献为研究数据,绘制国际教育史领域研究的知识图谱,借以探究国际教育史研究的热点主题、演变特征,并对未来教育史的研究前沿主题进行预测。经分析得出,国际教育史研究的热点主题定位于教师教育、后殖民主义教育、新教育运动;研究的演变特征表征为研究视野由国别史向全球史转向,研究对象向儿童、女性、少数族裔等边缘群体转移,史料观念向大史料观进发;根据模式性变化率、聚类间链接变化率和中心性分散度预测“教育记忆”和“教育博物馆”极易成为未来教育史研究的前沿主题。
