only δDH2o of inclusions in quartz of the Yushan ore district is - 89.5‰ which is within the range of δD values (-70‰ to - 90‰ ) of meteoric water during Cretaceous time in eastern China;
By exploration of self operation and joint venture, several major oil fields, such as QHD32 6, NB35 2, CFD11 1, BZ25 1 and PL19 3, are successively found, resulting in a great breakthrough in Bohai Sea`s exploration, which will play an important role in developing offshore petroleum industry and stabilizing oil production in the eastern China.
only δDH2o of inclusions in quartz of the Yushan ore district is - 89.5‰ which is within the range of δD values (-70‰ to - 90‰ ) of meteoric water during Cretaceous time in eastern China;
The 500-year 1° × 1° grid precipitation anomaly series in the east of China have been used to compartmentalize precipitation spatial patterns in these regions during the last 500 years.
the north flows coming from north of Okhotsk sea,the east flows coming from north of north-west pacific,and the north–west flow coming from the east of lake Baykal are jointed nearby 60°N,115～120°E,makes the velocity of north wind inbreaking the east of China speed up,Taiyuan is controled by the coherent north–west flow,it is drought.
Taking the paving works of an international airport runway in the east of China as the sample, the article analyzes in detail the selection of PCN calculation method, the choice of calculation parameters and the calculation course of PCN for the composite runway pavement, which have a certain of value for reference to calculate PCN of the similar engineering runway pavements.
According to the analysis of 19 cores from 5 wells and the geothermal data of 8 wells , the regional averagegeothermal gradient and uncorrected heatflow in the Huoshaoshan oilfield of the eastern Junggar basin were calculated23. 696℃/km and 40. 84mW/m~2. These two values were both lower than the average of the basins of the east partof China and global continents.
Results show that the spatial distribution of summer extreme precipitation in East China is significantly correlated with the same season SST in the sea area of 130~170°E,5~25°N;
In rift basins of East China occurs mantle source gas pool with 3He/4He ratio of 2.7～6.4Ra, and such mantle gases migration and accumulation are related to the regional deep faulting.
CO_2/3He ratio of the mantle-derived CO2 gas pools ranges from 107 to 1013 in petroliferous basins in East China. This differs greatly from the constant CO_2/3He ratio of 2×109 ~ 7×109 of the manile-derived CO2 gas whileSeparatng from the basalt magma.
canadensis has become an invasive weed in eastern China, and has caused serious damages to agricultural production and ecosystems in several provinces in China.
canadensis has become an invasive weed in eastern China, and has caused serious damages to agricultural production and ecosystems in several provinces in China.
This discovery is important because it can help us have a further understanding of the mechanism of magma degassing and accumulation of the inorganic CO2 in eastern China.
The impact of modifications of the surface characteristics on local climate is simulated with a numerical mesoscale model in the Yangtze delta region, east of China.
In the Dawu Well Field, a karst-fractured aquifer in Zibo City, in the east of China, has been seriously polluted by petrochemicals from the operation of petrochemical plants.
The east of China became the south-east monsoon area, whereas the south-west became the south-west monsoon area and the north-west turned into an arid inland region.
Using radio-soundings and pilot ballon wind observations of January andJuly 1956,the water vapour transfer and water balance over Eastern Chinaare calculated.Together with the seasonal variations of monsoon circulation,the transferof water vapour in summer is quite different from that in winter.However,in both seasons the inflow of water vapour from the south are much moretmportant than that either from west or from north.In comparison with theiotal transfer,the eddy transfer in general is less important,bu...
Based on the 10-years surface synoptic charts (1951 to 1960), monthly frequencies of cyclones and low pressure centers passing 2.5°× 2.5°latitude-longitude grids in Eastern Asia are analized and the main tracks are studied and classified.The cyclones are most frequent in middle part of Mongolia and north-east China, and none south of 20°N. Most of the low pressures occurred south of 45°N are very weak. Spring is the season of cyclonic activity.
China is one of the countries with the most numerous species of Dendrolimus in theworld. There are 13 known species. According to the research on the classification anddistribution of Dendrolimus in the country, by the Institute of Zoology, Academia Sinica,during the past years, the results indicate distinctly that their geographic distribution andthe distribution of their host-plant are closely related. Selecting the highest grade flora of China, we draw a line which divides the wholecountry into two main ...
我国东部
eastern china
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