Based on the strong earthquake catalogue, this paper discusses the characteristics of the time series of strong earthquake activities in the world, western Chinese mainland and its peripheral ＂big triangle seismic re...Based on the strong earthquake catalogue, this paper discusses the characteristics of the time series of strong earthquake activities in the world, western Chinese mainland and its peripheral ＂big triangle seismic region＂, as well as the Chinese mainland. According to the analysis of the periodic features of global seismicity of M I〉 8. 0 strong events, it is found that there is significant difference in global seismicity before and after the 1960s. Statistical analysis with the Fisher method has revealed that the ＂big triangular seismic region＂ has experienced a process of M8.0 earthquake activity with a duration of over a hundred years since 1800. Further analysis shows that the global seismicity and the ＂big triangular seismic region＂ possibly has a period of a hundred-year scale, and has quasi- synchronicity to a certain extent. The shallow earthquake activity of Ms I〉 7. 0 in the Chinese mainland is obviously controlled by the seismicity in the big triangular seismic region and by global seismicity in a larger spatial-scale. In terms of the time series of these earthquakes, the seismicity shows a decadal and century-scale activity patterns.展开更多
Kongsa Yedog, originally named Yexei Dorje, was born into a .common farming family in Gyangze County of the Xigaze area in 1916. In his teens, he was taken into the Tashilhungpo Monastery by his monk uncle to study Ti...Kongsa Yedog, originally named Yexei Dorje, was born into a .common farming family in Gyangze County of the Xigaze area in 1916. In his teens, he was taken into the Tashilhungpo Monastery by his monk uncle to study Tibetan language and sutras, studying together with several older male apprentices under an old lama. One year later, Yexei Dorje passed the examinations to become a real Zhaba of the monastery.展开更多
Comparative studies of the Yecheng section at the northern piedmont of the Kunlun Mountain, and the Surai Khola section at the southern piedmont of the Himalayan Mountain, indicates that the Qinghai-Tibet Plateau is d...Comparative studies of the Yecheng section at the northern piedmont of the Kunlun Mountain, and the Surai Khola section at the southern piedmont of the Himalayan Mountain, indicates that the Qinghai-Tibet Plateau is dominated by continuous uplift over the past 10 Ma. And the effective time scale for dividing the uplift stages would be 1 Ma. The uplift processes of the entire plateau can be divided mainly into three stages, i.e., a slow uplift stage (10.0-6.0 MaBP), a transitional uplift stage (6.0-2.5 MaBP) and a rapid uplift stage (since 2.5 MaBP). The plateau might have risen to 2000 m above sea level by 4.6 MaBP in response to uplift and to more than 3000 m by 2.5 MaBP.展开更多
基金sponsored by the National Basic Research Program(2008CB425700),China
文摘Based on the strong earthquake catalogue, this paper discusses the characteristics of the time series of strong earthquake activities in the world, western Chinese mainland and its peripheral ＂big triangle seismic region＂, as well as the Chinese mainland. According to the analysis of the periodic features of global seismicity of M I〉 8. 0 strong events, it is found that there is significant difference in global seismicity before and after the 1960s. Statistical analysis with the Fisher method has revealed that the ＂big triangular seismic region＂ has experienced a process of M8.0 earthquake activity with a duration of over a hundred years since 1800. Further analysis shows that the global seismicity and the ＂big triangular seismic region＂ possibly has a period of a hundred-year scale, and has quasi- synchronicity to a certain extent. The shallow earthquake activity of Ms I〉 7. 0 in the Chinese mainland is obviously controlled by the seismicity in the big triangular seismic region and by global seismicity in a larger spatial-scale. In terms of the time series of these earthquakes, the seismicity shows a decadal and century-scale activity patterns.
文摘Kongsa Yedog, originally named Yexei Dorje, was born into a .common farming family in Gyangze County of the Xigaze area in 1916. In his teens, he was taken into the Tashilhungpo Monastery by his monk uncle to study Tibetan language and sutras, studying together with several older male apprentices under an old lama. One year later, Yexei Dorje passed the examinations to become a real Zhaba of the monastery.
基金This work was supported by the National Natural Science Foundation of China (Grant No. 49802016) the opening foundation of Shapotou Desert Research & Experiment Station, CAS (Grant No. 200009) the National Key Basic Research Development Plan (Grant
文摘Comparative studies of the Yecheng section at the northern piedmont of the Kunlun Mountain, and the Surai Khola section at the southern piedmont of the Himalayan Mountain, indicates that the Qinghai-Tibet Plateau is dominated by continuous uplift over the past 10 Ma. And the effective time scale for dividing the uplift stages would be 1 Ma. The uplift processes of the entire plateau can be divided mainly into three stages, i.e., a slow uplift stage (10.0-6.0 MaBP), a transitional uplift stage (6.0-2.5 MaBP) and a rapid uplift stage (since 2.5 MaBP). The plateau might have risen to 2000 m above sea level by 4.6 MaBP in response to uplift and to more than 3000 m by 2.5 MaBP.
