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Yang L.-Z.,Shandong Institute of Geological Survey | Qu W.-L.,Qingdao Geo Engineering Exploration Institute | Zhang Y.,Shandong Institute of Geophysical and Geochemical Exploration | Liu C.-H.,Shandong Institute of Geological Survey
Acta Geoscientica Sinica | Year: 2013

Aimed at solving the geo-environmental problems such as land subsidence resulting from continuous falling of water table due to over-exploitation, the authors selected the area of deep groundwater in Dezhou City as the key study area and took water chemical composition and environmental isotopic information as the study targets to discuss origin and refreshing capacity of deep groundwater. The results show that deep groundwater in Dezhou was mainly derived from precipitation in the last glacial period characterized by cold climate. During its formation, it had the characteristics of leaching and was affected by evaporation and cation exchange action. Later, it was interfered by many times of seawater invasion. It was dominated by HCO3-Na type water characterized by high fluorine, high sodium, low calcium and alkalescence, together with low concentrations of hydrogen and oxygen isotopes and low tritium content. The deep groundwater in Dezhou is recycled slowly and its refreshing capability is weak. Source

Yang L.,Shandong Institute of Geological Survey | Wang X.,Shandong University of Science and Technology | Wang X.,Qingdao Geo Engineering Exploration Institute | Liu C.,Shandong Institute of Geological Survey
Northwestern Geology | Year: 2015

Since the end of 1950s, the geological environment is degenerating continuously, caused a series of geological environment problems, such as land subsidence, ground fissure, sea water or salty-water encroachment, and downward movement of saline-fresh water interface. All these problems were caused by the exceeded exploitation of groundwater during lately 60 years. At the 21 century, the quantity of groundwater exploitation is fleetly increased from 20 × 108m3/a to 52 × 108m3/a, which exceeds the available amount of groundwater 42 × 108m3/a in the Yellow River Downriver Plain. Because of long time extra-exploitation and irrational exploiting distribution, the groundwater table kept descending, the cone of groundwater depression kept spread. Thus, theenvironment accidents are frequent appeared, the quality of geological environment is deteriorating. In order to preventthe further deteriorating of geological environment, the groundwater must be reasonably developed in the present condition, and the groundwater system in plain area must be rehabilitated and conserved. Source

Yang L.-Z.,Shandong Institute of Geological Survey | Qu W.-L.,Qingdao Geo Engineering Exploration Institute | Tong Z.-H.,Shandong Institute of Surveying and Mapping of Geology | Liu C.-H.,Shandong Institute of Geological Survey | Liu Z.-Y.,Shandong Institute of Geological Survey
Acta Geoscientica Sinica | Year: 2014

Based on the data from dense sampling and accurate testing, associated with the hydrogeological condition and pollution situation of Lubei plain, the authors studied the content and the extent of organic pollution in the shallow groundwater. The results show that the shallow groundwater has been subjected to extensive organic pollution and formed many shallow contaminated areas. It is shown that organic pollutants have 13 species, with one or two species having very high content. The area coverage and extent of the contamination are controlled by the plant location of the Shengli oil field and the distribution of petrochemical enterprises. Source

Su X.-L.,Qingdao Geo Engineering Exploration Institute | Zhao Y.-L.,Third Exploration Institute of Geology and Mineral Resources of Qinghai Province | Zhao C.,Qingdao Geo Engineering Exploration Institute | Zhang X.-M.,Qingdao Geo Engineering Exploration Institute | And 3 more authors.
Geology in China | Year: 2014

The Qimantag metallogenic belt in the East Kunlun Mountains is characterized by a large variety of deposit types and metallic kinds, with skarn deposits being the typical type. Hence, this belt has become one of the hotspots among geologists. In recent years, the prospecting for porphyry copper molybdenum deposit has achieved new breakthroughs continually in this metallogenic belt. In Ketinghaer, to the east of this belt, a new porphyry copper molybdenum deposit was discovered in 2013. The strata in this area belong mainly to Paleoproterozoic Jinshuikou Group, and the main rocks are metamorphic rocks, such as gneiss and marble. The Variscan and Indosinian intermediate-acidic intrusive rocks are widely distributed in this area, with the Indosinian intrusive rocks being the host rocks; within the rock bodies, there are small porphyry mass and cryptoexplosion breccia. In addition, the NW-, NE-trending structures and multiple geophysical-geochemical anomalies are also distributed in this area. Through a comprehensive analysis of the above conditions including geological conditions, geophysical-geochemical anomalies, and characteristics of typical porphyry copper molybdenum deposits, the authors tentatively summed up the prospecting thinking for porphyry deposits. On such a basis, the prospecting work was carried out, which led to the breakthrough finally. And then, the authors summarized the prospecting thinking and methods for the Ketinghaer porphyry copper molybdenum deposit, and established a geological-geochemical-geophysical comprehensive model so as to provide the train of thought and orientation in search for the same type of deposits in this region. Source

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