Archaeological geophysical detection technology and its application
Twenty-two advanced methods and technologies, such as high-precision gravity method, high-precision magnetic method, complex resistivity method and transient electromagnetic method, DC/ AC resistivity (induced polarization) sounding and profiling method, geological radar method, elastic wave method, soil mercury measurement and soil mercury gas measurement, nuclear magnetic resonance method, α-cup method, ground temperature measurement and natural potential method, were used to complete the profile measurement.
Exploration shows that the underground palace and the tomb are under the sealed mound, and there are exquisite rammed earth walls and tombs facing west in the sealed mound, and there may be metal products in the tombs. The main body of the tomb has not collapsed and water has not entered. The excavation scope and depth of the underground palace, the size of the tomb and the inference of the building materials of the tomb are given. It is considered that the water blocking effect of the drainage channel is still good at present, and there is an east-west gravel accumulation zone on the south side of the earth-sealed pile, and a new explanation of the characteristics and abnormal distribution of mercury 300 feet away. Among them, the existence of the tomb, the excavation scope of the fine rammed earth wall, Xiling and the underground palace, and the water blocking effect of the drainage channel are still there, and the gravel accumulation on the south side of the earth-sealed pile has been preliminarily confirmed.
The effective methods and technical combinations of geophysical exploration methods in detecting underground palaces and their burial pits, tombs and ground building sites are screened out.
Two-dimensional inversion model and comprehensive profile of Luoyang shovel hole by electrical method
Magnetic anomaly of sealed soil pile and drilling verification results of fine rammed earth wall
Study on the strategy, method, technology and application of geochemical mapping
From 1979, the "National Regional Geochemical Exploration Plan" was officially implemented until the end of 2005, and the mapping area nationwide has reached 6.73 million km2. China's new theories, strategies, methods and technologies in geochemical mapping have been recognized by many countries in the world. Under the guidance of China, many countries have carried out many cooperative projects.
The regional geochemical scanning methods of landscape areas such as alpine mountain areas, arid desert areas and semi-arid grassland desert areas have been developed. Thirty-nine multi-method analysis systems have been established, in which X-ray fluorescence or plasma emission spectrum analysis is the main body, atomic absorption, atomic fluorescence and polarography, and ion-selective electrode are the means to form a multi-element multi-method analysis system. The national analysis quality monitoring scheme and reference materials were formulated, and the selectivity of input analysis methods, the bias between different analysis batches and the inter-provincial analysis bias between map sheets were monitored. A new geochemical exploration technique for gold deposits has been developed. For ultra-fine-grained gold, the detection limit of gold is reduced to one in two billion, thus delineating the regional anomalies of tens to hundreds of square kilometers around gold deposits with economic value and expanding the gold prospecting target area.
Geochemical landscape zoning map of China
Lead geochemical map of China
Aeromagnetic △T anomaly map of China and its adjacent areas (1:5 million)
The basic situation of 493 aeromagnetic survey areas in China is analyzed. According to the specific geographical and geophysical conditions of our country, facing the actual data and relevant national standards, a reasonable mapping scheme is formulated. It is the latest and most comprehensive aeromagnetic basic map covering the largest land area of China so far. The mapping method adopted applies aeromagnetic processing mapping software technology, among which the key technologies such as minimum curvature random meshing method and digital grid evaluation splicing method ensure the mapping quality; The surveying and mapping process is fully digitized, and the surveying and mapping methods have been greatly improved; A complete set of aeromagnetic survey data of China land and resources system has been formed.
Y- 12 aircraft is equipped with aeromagnetic gradient measurement system.
Aeromagnetic△ T anomaly map of China and its adjacent waters
Comprehensive investigation and study on land and resources in Guizhou Province by remote sensing
Taking advantage of the technical advantages of large amount of remote sensing information, rapid mapping, multi-level and macro-comprehensiveness, applying new technologies such as remote sensing, computer and geographic information system, and combining with conventional investigation methods, a multidisciplinary and comprehensive survey of land and resources was carried out, with rich contents. It covers the main aspects of resources and environment in Guizhou Province, including land resources, mineral resources, water resources, forest resources, tourism resources, geological structure, geological disasters, soil erosion, land rocky desertification, surface water pollution, meteorological disasters, urban land use status, greening status, atmospheric environment, water environment, acoustic environment, ecological landscape and typical area-qingzhen city sloping farmland survey. , basically found out the land in Guizhou Province.
2005-2006 report on the scientific and technological development of the Ministry of Land and Resources
Synthetic band: TM 7.4.3 (1998.117) remote sensing map.
Research and application of new diamond bit with insert teeth and its technology
A new type of diamond bit with embedded teeth with independent intellectual property rights has been successfully developed. Pre-alloyed nano-powder was developed, and the welding layer on the surface of diamond stone was welded by automatic welding process in a furnace with a drill bit. The new diamond bit with insert teeth has a unique structure with large nozzle, high specific pressure and high diamond layer. By integrating three manufacturing methods of drill bit (hot pressing, pressureless and brazing), the adaptability of drill bit to stratum is enhanced, the service life of drill bit is prolonged, and the ROP is increased, thus saving drilling cost, shortening drilling cycle and accelerating the speed of resource exploration. The welding strength of drill block is high, which solves the key problems in bit manufacturing, and the tire block does not fall off when drilling deep holes (wells), thus ensuring the safety of drilling deep holes (wells).
A new type of diamond bit with insert teeth for continental scientific drilling
Experimental study on simulation of marine natural gas hydrate
The simulation experiment of natural gas hydrate was carried out, three sets of simulation experimental devices with completely independent intellectual property rights were established, and the stability conditions, geochemical and geophysical characteristics of hydrate in marine sediments were studied, which provided basic parameters and technical support for the exploration and development of natural gas hydrate in China's sea areas.
Main laboratory equipment and devices for studying hydrate phase equilibrium conditions
Study on seismic method and technology in metal mines
The seismic methods and techniques in metal ore exploration are systematically studied, including theoretical basis, numerical simulation, field data acquisition, data processing and comprehensive interpretation techniques. In the aspect of data processing, the processing software suitable for seismic data of metal mines is developed. The method and technology of ground seismic tomography are studied. According to the inversion velocity profile of surface seismic tomography, the structural form of stratum, the distribution of concealed rock mass and fault structure can be explained intuitively.
Using high-resolution seismic profile and surface seismic tomography velocity profile to detect inhomogeneity in rock mass. According to the obtained seismic profile and borehole data, the connection mode of ore bodies between boreholes is corrected, and the ore bodies exposed by boreholes are tracked horizontally to obtain a seismic geological profile that can accurately reflect the distribution and geological structure of ore bodies. The local inhomogeneity related to massive sulfide metal ore was successfully detected by seismic scattered wave, and the seismic processing software suitable for scattered wave imaging was developed after drilling verification. A comprehensive seismic detection technique is proposed, which uses reflected waves to detect ore-controlling structures and the distribution of concealed rock masses, and uses scattered waves to detect local inhomogeneities related to massive sulfide metal mines.
Velocity profile of ground seismic tomography
High resolution seismic reflection profile in polymetallic mining area
Research on Remote Demonstration of Large-scale Scientific Equipment —— Ion Probe Demonstration System
Supported by computer remote control technology and public broadband network technology, through the application of remote control, remote data acquisition and remote interactive collaborative research, a research platform for remote operation and enjoyment of large ion probe mass spectrometer is finally constructed. This project realizes the real-time remote control of ion probe mass spectrometer based on public network environment, and achieves the effect of conducting experiments in Beijing ion probe center in person, which can meet the needs of many scientists to conduct collaborative experiments in different places in real time.
The project team has successively established remote workstations in Yichang, Hubei Province and the University of S? o Paulo, Brazil, and achieved complete success. In 2006, based on the successful realization of the remote demonstration system of ion probe, a general system for remote sharing of microbeam analytical instruments was developed, and the remote sharing of ion probe, electron probe and laser probe was gradually realized. A network virtual experiment center with SHRIMP II, scanning electron microscope and MAT900 as the core instruments was initially established.
Remote operation of ion probe by teachers and students at the University of S? o Paulo, Brazil
Long-distance communication between Chinese and Pakistani scientists
Study on Reference Value and Database of Soil Eco-geochemistry in China
The study area includes Sanjiang Plain, Songliao Plain, Huanghuaihai Plain, Yangtze River Delta Plain, Jianghan Plain, Poyang Lake Plain, Nanyang Basin and Pearl River Delta. The appropriate sampling depth (-150 ~- 175 cm) was determined by element correlation method. In the research area of about 850,000 km2, * * * collected 5 17 soil samples, and quantitatively analyzed and tested 88 indicators, including 76 indicators of chemical elements, 4 indicators of soil physical and chemical properties, 3 indicators of soil particle composition (clay, silt and sand) and 5 indicators of soil mineral composition (montmorillonite, hydromica, kaolinite, Yingshi and feldspar).
According to the sample analysis and test data, the soil eco-geochemical reference values of 76 chemical elements (including oxides) and the reference values of 4 physical and chemical indexes such as pH value, conductivity, organic carbon and H2O+ in 8 alluvial plains and 9 statistical units in the whole eastern plain were counted respectively. According to the quantitative analysis results of soil particle composition, the soil texture in the eastern plain of China was classified. Using MAPGIS geographic information system, the spatial database of soil eco-geochemical benchmark values in the eastern plain of China was constructed, and the research results of benchmark values were visualized, and all the original analysis data were made public in the form of database.
Interface of spatial database of soil eco-geochemical reference values