The Longling-Ruili fault is an important active fault in Southwestern China,striking generally northeast.The fault controls the development of the sedimentary series and magmatic action on its two sides,as well as the...The Longling-Ruili fault is an important active fault in Southwestern China,striking generally northeast.The fault controls the development of the sedimentary series and magmatic action on its two sides,as well as the development of the Longling basin,Mangshi basin and the Zhefang basin along it.Due to limited Quaternary sediments and harsh natural conditions,the study of late Quaternary fault activity on the northern segment of the Longling-Ruili fault is lacking and the time of the newest faulting and the Quaternary slip rate are not clear at present.Based on the interpretation of remote images,quantitative geomorphologic deformation measurements and dating of young terrace deposits and alluvial fans,this paper obtains some new results as follows.The northern segment of the Longling-Ruili fault is a Holocene dextral strike-slip fault with some component of a normal slip.The terrace T 1 composing mainly of alluvial deposits formed during 4ka B.P.was offset by the northern segment of the Longling-Ruili fault and its left-lateral and its vertical displacements are 8m ~ 12m and 2m,respectively.The late Pleistocene alluvial fan was displaced with a left-lateral and vertical displacement of 70m and 18m,respectively.The strike-slip rate of the Longling-Ruili fault is 2.2mm/a ~ 2.5mm/a and the vertical slip rate is 0.6mm/a since the late Pleistocene epoch.The strike-slip rate of the Longling-Ruili fault is 1.8mm/a ~ 3.0mm/a and vertical slip rate is 0.5mm/a during the Holocene epoch.The proportion of horizontal to vertical displacement is about 4:1,which means that the vertical slip rate on the northern segment of the Longling-Ruili fault is about 25% of the horizontal slip rate.The left-lateral slip rate in the late Holocene is consistent with the GPS measurement.The strike slip rate is of great consistency in different time scales since the late Pleistocene epoch,indicating that the activity of the Longling-Ruili fault is of great stability.展开更多
According to field investigation and interpretation of remote sensing images,the north segment of the Longling-Ruili fault is a Holocene dextral strike-slip fault with a small amount of normal faulting.Based on large-...According to field investigation and interpretation of remote sensing images,the north segment of the Longling-Ruili fault is a Holocene dextral strike-slip fault with a small amount of normal faulting.Based on large-scale geological mapping at some typical locations and quantitative geomorphologic deformation measurement and dating analysis,this fault is a Holocene active fault.The strike-slip rate of the Longling-Ruili fault is 2.2 ~2.5mm / a and vertical slip rate is 0.6mm /a since the late Pleistocene epoch.The strike-slip rate of the Longling-Ruili fault is 1.8~3.0mm /a and vertical slip rate is 0.5mm /a since the Holocene epoch.Based on the Poisson model,lognormal model and BPT model,the occurrence probability of strong earthquakes in 50 years is estimated to be 6.32%,0.08%and 0.05%,respectively.Then,a 1.82% probability of occurrence of characteristic earthquake for the north segment of the Longling-Ruili fault is obtained by setting a weight of 0.28,0.36 and 0.36 to the Poisson model,lognormal model and BPT model,respectively.展开更多
The Dai nationality, with a population of 1,025,128, mainly reside in Xishuangbanna Dai Nationality Autonomous Prefecture, Dehong Dai and Jingpo Nationalities Autonomous Prefecture, and 30 counties and cities such as ...The Dai nationality, with a population of 1,025,128, mainly reside in Xishuangbanna Dai Nationality Autonomous Prefecture, Dehong Dai and Jingpo Nationalities Autonomous Prefecture, and 30 counties and cities such as Gengma and Menglian in Yunnan Province.The Dai nationality has its own written language. The 1,000-year Dai documents, including Buddhist Scriptures on Pattra and the famous Dai calendar, prove that the Dai nationality has long cultural history. The Dai narrative poem, Zhaoshutun and Nanmunuona (a legend about a prince and a peacock princess) and the medical classic entitled Traditional Dai Medicine, are important to the precious Chinese cultural heritage. The Dais celebrate the Water-sprinkling Festival every April.The Dais tend to settle along rivers. The ever-green Dai area has a subtropical climate with thick forests. The plentiful rainfall and the fertile soil are favorable to farming.Xishuangbanna Prefecture, dubbed as the "Kingdom of plants" and "Kingdom of animals", has a variety展开更多
【目的】比较云南瑞丽地区不同树龄水晶蜜柚的果实品质及风味特性,为云南地区水晶蜜柚高效生产提供科学依据。【方法】分别测定云南瑞丽地区3、5、7、10、14和21年生树龄水晶蜜柚果实的单果重、果形指数、皮厚和果皮色泽等外观品质及果...【目的】比较云南瑞丽地区不同树龄水晶蜜柚的果实品质及风味特性,为云南地区水晶蜜柚高效生产提供科学依据。【方法】分别测定云南瑞丽地区3、5、7、10、14和21年生树龄水晶蜜柚果实的单果重、果形指数、皮厚和果皮色泽等外观品质及果实可溶性固形物含量、可滴定酸含量、固酸比和维生素C(Vc)含量等内在品质,并对果实进行感官风味品尝鉴定,分析水晶蜜柚果实品质随树龄增长的变化规律。【结果】随着树龄的增长,水晶蜜柚果实的果形指数未发生明显变化;单果重、皮厚及果皮占单果重比例随树龄的增长呈下降趋势,树龄小于14年水晶蜜柚果实间的单果重差异不显著(P>0.05),但皮厚和果皮占单果重比例显著降低(P<0.05,下同),当树龄为21年(进入老龄结果期)时,单果重显著降低。果皮色差指数L*、a*和b*随着树龄增长而逐渐增长,且树龄相差越大,差异越明显。随着树龄的增长,果实的可溶性固形物含量、固酸比和Vc含量均呈先增加后减少的变化趋势,树龄为14年时达最大值,分别为11.97%、18.91和53.70 mg/100 m L;可滴定酸含量呈先减少后增加的变化趋势,树龄为14年时达最小值,为0.63%,与其他树龄差异显著。感官风味评价综合满意度也随树龄的增长呈先增加后降低的变化趋势,树龄为14年时最高,为2.56分。相关性分析结果显示,水晶蜜柚果实的内在品质与果实感官风味存在一定的相关性,其中可溶性固形物含量、可滴定酸含量和固酸比对果实感官风味影响均较明显,Vc含量对果实风味影响相对较小。【结论】云南省瑞丽地区14年生水晶蜜柚果实的外观品质趋于稳定,其内在品质和感官品质最佳。展开更多
基金sponsored by the Science and Technology Development Program of the Ministry of Railways(2008G027B),the People's Republic of Chinathe National Key Technology R&D Program(2006BAC13B)103),China
文摘The Longling-Ruili fault is an important active fault in Southwestern China,striking generally northeast.The fault controls the development of the sedimentary series and magmatic action on its two sides,as well as the development of the Longling basin,Mangshi basin and the Zhefang basin along it.Due to limited Quaternary sediments and harsh natural conditions,the study of late Quaternary fault activity on the northern segment of the Longling-Ruili fault is lacking and the time of the newest faulting and the Quaternary slip rate are not clear at present.Based on the interpretation of remote images,quantitative geomorphologic deformation measurements and dating of young terrace deposits and alluvial fans,this paper obtains some new results as follows.The northern segment of the Longling-Ruili fault is a Holocene dextral strike-slip fault with some component of a normal slip.The terrace T 1 composing mainly of alluvial deposits formed during 4ka B.P.was offset by the northern segment of the Longling-Ruili fault and its left-lateral and its vertical displacements are 8m ~ 12m and 2m,respectively.The late Pleistocene alluvial fan was displaced with a left-lateral and vertical displacement of 70m and 18m,respectively.The strike-slip rate of the Longling-Ruili fault is 2.2mm/a ~ 2.5mm/a and the vertical slip rate is 0.6mm/a since the late Pleistocene epoch.The strike-slip rate of the Longling-Ruili fault is 1.8mm/a ~ 3.0mm/a and vertical slip rate is 0.5mm/a during the Holocene epoch.The proportion of horizontal to vertical displacement is about 4:1,which means that the vertical slip rate on the northern segment of the Longling-Ruili fault is about 25% of the horizontal slip rate.The left-lateral slip rate in the late Holocene is consistent with the GPS measurement.The strike slip rate is of great consistency in different time scales since the late Pleistocene epoch,indicating that the activity of the Longling-Ruili fault is of great stability.
基金sponsored by the Science and Technology Development Program of Ministry of Railways,PRC(2008G027-B)Special Program of Deep Exploration Techniques and Experimental Studies of Ministry of Land and Resources,PRC(Sinoprobe-06-04)
文摘According to field investigation and interpretation of remote sensing images,the north segment of the Longling-Ruili fault is a Holocene dextral strike-slip fault with a small amount of normal faulting.Based on large-scale geological mapping at some typical locations and quantitative geomorphologic deformation measurement and dating analysis,this fault is a Holocene active fault.The strike-slip rate of the Longling-Ruili fault is 2.2 ~2.5mm / a and vertical slip rate is 0.6mm /a since the late Pleistocene epoch.The strike-slip rate of the Longling-Ruili fault is 1.8~3.0mm /a and vertical slip rate is 0.5mm /a since the Holocene epoch.Based on the Poisson model,lognormal model and BPT model,the occurrence probability of strong earthquakes in 50 years is estimated to be 6.32%,0.08%and 0.05%,respectively.Then,a 1.82% probability of occurrence of characteristic earthquake for the north segment of the Longling-Ruili fault is obtained by setting a weight of 0.28,0.36 and 0.36 to the Poisson model,lognormal model and BPT model,respectively.
文摘The Dai nationality, with a population of 1,025,128, mainly reside in Xishuangbanna Dai Nationality Autonomous Prefecture, Dehong Dai and Jingpo Nationalities Autonomous Prefecture, and 30 counties and cities such as Gengma and Menglian in Yunnan Province.The Dai nationality has its own written language. The 1,000-year Dai documents, including Buddhist Scriptures on Pattra and the famous Dai calendar, prove that the Dai nationality has long cultural history. The Dai narrative poem, Zhaoshutun and Nanmunuona (a legend about a prince and a peacock princess) and the medical classic entitled Traditional Dai Medicine, are important to the precious Chinese cultural heritage. The Dais celebrate the Water-sprinkling Festival every April.The Dais tend to settle along rivers. The ever-green Dai area has a subtropical climate with thick forests. The plentiful rainfall and the fertile soil are favorable to farming.Xishuangbanna Prefecture, dubbed as the "Kingdom of plants" and "Kingdom of animals", has a variety
文摘【目的】比较云南瑞丽地区不同树龄水晶蜜柚的果实品质及风味特性,为云南地区水晶蜜柚高效生产提供科学依据。【方法】分别测定云南瑞丽地区3、5、7、10、14和21年生树龄水晶蜜柚果实的单果重、果形指数、皮厚和果皮色泽等外观品质及果实可溶性固形物含量、可滴定酸含量、固酸比和维生素C(Vc)含量等内在品质,并对果实进行感官风味品尝鉴定,分析水晶蜜柚果实品质随树龄增长的变化规律。【结果】随着树龄的增长,水晶蜜柚果实的果形指数未发生明显变化;单果重、皮厚及果皮占单果重比例随树龄的增长呈下降趋势,树龄小于14年水晶蜜柚果实间的单果重差异不显著(P>0.05),但皮厚和果皮占单果重比例显著降低(P<0.05,下同),当树龄为21年(进入老龄结果期)时,单果重显著降低。果皮色差指数L*、a*和b*随着树龄增长而逐渐增长,且树龄相差越大,差异越明显。随着树龄的增长,果实的可溶性固形物含量、固酸比和Vc含量均呈先增加后减少的变化趋势,树龄为14年时达最大值,分别为11.97%、18.91和53.70 mg/100 m L;可滴定酸含量呈先减少后增加的变化趋势,树龄为14年时达最小值,为0.63%,与其他树龄差异显著。感官风味评价综合满意度也随树龄的增长呈先增加后降低的变化趋势,树龄为14年时最高,为2.56分。相关性分析结果显示,水晶蜜柚果实的内在品质与果实感官风味存在一定的相关性,其中可溶性固形物含量、可滴定酸含量和固酸比对果实感官风味影响均较明显,Vc含量对果实风味影响相对较小。【结论】云南省瑞丽地区14年生水晶蜜柚果实的外观品质趋于稳定,其内在品质和感官品质最佳。