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991.
湛江工业化与工业支柱产业的选择 总被引:2,自引:0,他引:2
工业化一直是湛江经济发展的重要问题。经过计算和比较得出了一个判断———湛江工业化一直处于比较低水平 ,其关键问题是工业支柱产业不明确。按照支柱产业基准对湛江工业行业进行定量计算与定性分析 ,提出湛江工业支柱产业的选择方案。 相似文献
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On tectonic movement in the South China Sea during the Cenozoic 总被引:1,自引:1,他引:0
The tectonic movement taking place at the end of Cretaceous and the beginning of Cenozoic had opened the Cenozoic phase of polycyclic tectonic movements, then the whole crust of the South China Sea had been mainly subjected to the regional stress field of tectonic tension, which was characterized by rifting depression. Seven times of regional tectonic movement and sedimentation had been assembled into a geological development history of polycyclic oscillation. Especially, the tectonic movements were strongly intensified at the end of Cretacious and the beginning of Paleagene, between Late Eocene and MidOligocene, during Mid and Late Miocene. These three times of tectonic movement had built the most important regional tectonic interfaces in the South China Sea. Crust movements of the South China Sea were the result and epitome of interaction of the Eurasia, Pacific and IndoAustralia plates, that is, they were introduced by polycyclic changes of directions, rates and strengths of lithospheric movements and asthenospheric flows across the Pacific and IndoAustralia plates. 相似文献
997.
依据《地质矿产实验室测试质量管理规范》,并结合山西省的地质情况建立了一套1:5万区域化探样品分析测试的质量监控体系。分四个部分详细论述了的1:5万区域化探样品分析测试的质量监控体系。过去1:5万质量监控体系完全是靠人工进行,效率低下;本质量监控体系与过去相比,不但节省了大量的人力、物力,而且更加准确、迅速,更能适应1:5万质量监控大量数据处理的需要。 相似文献
998.
日前,由桐庐县国土资源局拟订的《桐庐县矿产资源规划实施方案(2006—2010)》经县政府研究同意,以桐政办[2008]220号文发布实施。《桐庐县矿产资源规划》依据上级国土资源部门要求,紧密结合本县实际,确定了矿产资源发展方向、战略目标、基本原则、重点矿种和区域矿产,划定了重点开采区. 相似文献
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The Zhelin Bay is one of the most important bays for large-scale mariculture in Guangdong Province, China. Owing to the increasing human population and the expanding mariculture in the last two decades, the ecological environment has greatly changed with frequent harmful algal blooms. A monthly survey of water content, organic matter (TOM), and various forms of nitrogen and phosphorous in sediment from July 2002 to July 2003 in the bay was conducted. The results showed that the water content was correlated significantly with TOM and various forms of nitrogen and phosphorus and can be used as proxy for quick and rough estimate of these factors in the future surveys. TOM was also correlated significantly with various forms of nitrogen and phosphorus, indicating that it was one of the key factors affecting the concentrations and distributions of nitrogen and phosphorus in the investigated waters. Average total Kjeldhal nitrogen (TkN) content was( 1 113.1 ± 382.5)μg/g and average total phosphorus (TP) content was(567.2± 223.3)μg/g, and both were much higher than those of similar estuaries in China and elsewhere. Average nitrogen and phosphorus tended to be higher inside than outside the bay, higher at aquaculture than non-aquaculture areas, and higher at fish-cage culture than oyster culture areas, suggesting that large-scale mariculture inside the bay played an important role in the eutrophication of the Zhelin Bay. Various forms of nitrogen and phosphorus concentrations were higher during the warm season (July--September), which was due to the increased decomposition and concentration of organic matter resulted from the fast growth and high mortality of the cultured species. Compared with July 2002, TkN and TP contents were much higher in July 2003, in consonance with the eutrophication of the Zhelin Bay. Because exchangeable phosphorus (Ex-P), iron-bounded phos- phorus (Fe-P) and organic phosphorus (OP) combined accounted for 34.3% of the TP and authigenic phosphorus (Au-P 相似文献