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8 People Including Xu Xiwei Attended the 2015 AGU Fall Meeting

2016/6/7 14:32:11

 The 2015 AGU Fall Meeting initiated and organized by American Geophysical Union (AGU) was ceremoniously held in San Francisco, the United States from December 14 to 18.This conference is world’s largest international conference for earth and space science.

During meeting, researcher Xu Xiwei as a convener presided over topic “Active Tectonics, Earthquake Geology, and Surface Processes in South and East Asia”, made an oral report titled “Long-term faulting behavior of eastern Altyn Tagh fault, north Tibetan Plateau” under this topic, and mainly introduced the achievements of the research carried out in the recent years on faulted landform and pale-earthquake in Altyn Tagh Fault. On invitation, associate researcher Chen Guihua made an oral report titled “Seismic Site Conditions of China Based on Geology”, displayed the result of using geological data (particularly, quaternary geology and landform) to classify national earthquake site conditions. It is the first nationwide earthquake site classification result and conducive to more accurate seismic ground motion prediction and seismic risk assessment.

Associate researcher Wang Lifeng as a convener presided over topic “Earthquake Source Studies: Finite-Fault Inversion, Modeling and Data Assimilation” and also displayed a panel titled “Quantifying slip balance among Inter-, co- and post- seismic phase” under topic “Tectonophysics”. This research quantitatively estimated strain release level of great earthquake, strain accumulation time (recurrence period) and residual strain after occurrence of great earthquake, providing a basis for risk assessment after a great earthquake.

Researcher He Changrong made an oral report titled “Dry and wet friction of plagioclase: Pure cataclastic flow (CF) vs. CF with concurrent pressure solution” under topic “Mineraland Rock Physics”. This research found a new basis based on mechanical data for the main effect of pressure solution in friction slip on the basis of comparing dry and watery samples. Research assistant Zhang Lei displayed a panel titled “Frictional properties of phyllosilicate-rich mylonte and conditions for brittle-ductile transion” under this topic, and described the nature of friction slip of phyllosilicate mylonite under different warm-pressing conditions, as well as conditions of brittle plastic transition.

Associate researcher Ma Yan displayed a panel titled “Cosmogenic nuclides 10Be–21 Neburial dating of middle Miocene sedimentary formation of the Hongliu valley in southern Ningxia basin: A case of isotopic geochronology study for the Cenozoic sedimentary strata” under topic “Volcanology, Geochemisty and Petrology”, and explored the feasibility of applying cosmogenic nuclides in 10Be-21Neburial dating method in the aspect of determination of isotop chronosequence of Late Cenozoic strata. Engineer Pang Jianzhang displayed a panel titled“Late Cenozoic out-of-sequence growth of the southern Qilian Shan: Insights from apatite fission track thermochronology” under this topic, introduced the Low-temperature thermochronology result in the southern margin of Qilian Mountain obtained by his research group and determined the time-space sequence of tectonic uplifts in the southern margin of Qilian Mountain.

Dr Wang Yizhou displayed a panel titled “How a stationary knick point is sustained: New insights into the formation of the deep Yarlung Tsangpo Gorge” under topic “Earth and Planetary Surface Processes”, and indicated this research proceeded from necessary conditions for maintaining stability of knick pointsand explored the cause of formationof the deep Yarlung Tsangpo Gorge.

During the meeting, in addition to attending special reports, He Changrong and Zhang Lei also visited Byerlee Laboratory of USGSand exchanged ideas in depth and details with the personnel of the laboratory on experimental research of rock mechanics.

As an academic pageant in the field of earth and space science, AGU meeting is large and its directions are complete. Every year, AGU Fall Meeting seemingly condenses the earth and a year to Moscone Conference Center. This year, nearly 24,000 scientists and educators from relevant fields attended this meeting. The meeting arranged more than 20,000 oral reports and poster booths, and nearly 2000 parallel sessions. The topics cover earth and space science, biogeosciences, geophysics, atmospheric physics, geochemistry, petrology, structural geology, seismology, global environmental change, education and human resources. Experts, scholars and postgraduates from various fields attended the meeting, brought rich and colorful report and panel information, and displayed and exchanged the scientific frontier issues and new progresses in every field. Through a few days’ meeting, people may know the latest research directions and research achievements in their own fields and figure out definite objectives and directions for future scientific research. It is a matter of significance to every scientific worker.

People present at the meeting were deeply impressed by this AGUmeeting. Firstly, from listening to reports and discussion with international peers, they knew unique analysis perspectives and novel research methods for the scientific issues in their research fields; further, they truly understood the development of new technologies and new methods is not limited to technical innovation, and it is equally important to apply traditional methods in new fields and adopt new ways of analysis for traditional methods; further, people shouldn’t communicate with others by using published mature data. Instead, they should use the things that are obtained in later stage of research and need to be summarized quickly, and should adopt a serious attitude. In this way, it may greatly promote research work and a good effect can be expected from the exchange. In comparison, the work of scientific research in foreign countries is less stressful and utilitarian than that in domestic scientific research circles, while interest is the first driving force. Wish Chinese scientific research environment will get better.