滇东地区煤田构造格局与煤系赋存规律的研究   总被引：1，自引：0，他引：1  

陶志刚  曹代勇  李建  石显耀  林玉成  王坚 《中国煤炭地质》2011,(8):56-59

滇东地区位于特提斯和环太平洋构造体系的交接部位,煤田构造格局的总体特征是呈NNE向条带状展布。区内断层以NNE、NE向为主,受主要断裂影响,煤田在南北向呈带状,东西向呈段状展布,各煤矿区在平面上呈NE向带状分布。研究区煤系赋存受基底主干断裂的控制作用明显,变形强度由北向南逐渐增强,北部地区以褶皱构造为主,断层较少,煤层多保存于向斜构造中,保存较完整,煤层埋藏较深;南部受弥勒-师宗断裂带影响,断裂构造极为发育,对煤层破坏严重,煤系赋存不稳定。  相似文献   

An application of a new method in permafrost environment assessment of Muli mining area in Qinghai-Tibet Plateau,China   总被引：3，自引：2，他引：1  

Wei Cao  Yu Sheng  Yinghong Qin  Jing Li  Jichun Wu 《Environmental Earth Sciences》2011,63(3):609-616

The permafrost environment in the Muli mining area, an opencast mining site in the Qinghai-Tibet Plateau, China, is now undergoing significant degradation because of the ongoing mining activities. The permafrost environment in this mining site had already been evaluated by previous study, in which analytic hierarchy process was applied. Although this method can roughly characterize the permafrost environment of this mining site, it has limitations by being easily affected by man-made factors. In view of this limitation, this study attempts to employ a new method, the catastrophe progression method, to estimate the current stage of the permafrost environment in this mining area. The results show that, by catastrophe progression method, currently the calculated indexes of the permafrost freezing–thawing disintegration, permafrost thermal stability, permafrost ecological fragility, and the permafrost environment are 0.43 (general situation), 0.77 (general situation), 0.71 (bad situation) and 0.83 (general situation), respectively. These values imply that the permafrost environment has been damaged by anthropologic activities to a certain degree and potentially may be further degenerated. However, at this degree, a new equilibrium stage of permafrost environment could be achieved if the current state of environmental degradation is stabilized and treatments are constructed against further damages.  相似文献   

Stock discrimination of spottedtail goby (Synechogobius ommaturus) in the Yellow Sea by analysis of otolith shape   总被引：1，自引：0，他引：1  

王英俊  叶振江  刘群  曹亮 《中国海洋湖沼学报》2011,29(1):192-198

Otolith shape is species specific and is an ideal marker of fish population affiliation. In this study, otolith shape of spottedtail goby Synechogobius ommaturus is used to identify stocks in different spawning locations in the Yellow Sea. The main objectives of this study are to explore the potential existence of local stocks of spottedtail goby in the Yellow Sea by analysis of otolith shape, and to investigate ambient impacts on otolith shape. Spottedtail goby was sampled in five locations in the Yellow Sea in 2007 and 2008. Otoliths are described using variables correlated to size (otolith area, perimeter, length, width, and weight) and shape (rectangularity, circularity, and 20 Fourier harmonics). Only standardized otolith variables are used so that the effect of otolith size on the shape variables could be eliminated. There is no significant difference among variables of sex, year, and side (left and right). However, the otolith shapes of the spring stocks and the autumn stocks differ significantly. Otolith shape differences are greater among locations than between years. Correct classification rate of spottedtail goby with the otolith shape at different sampling locations range from 29.7%–77.4%.  相似文献   

Otolith chemical signatures of spottedtail goby Synechogobius ommaturus in coastal waters of China     

��Ӣ��  Ҷ��  ��Ⱥ  ��Ρ��  ����  ��ΰ 《中国海洋湖沼学报》2011,29(3):640-646

This study explores the potential existence of local stocks of Synechogobius ommaturus using otolith chemical signatures. The concentrations of 10 elements (K, Ca, Na, Mg, Sr, Pb, Ba, Mn, Co, Zn) in the otoliths from eight stocks (Dandong, Dalian, Tianjin, Dongying, Weihai, Qingdao, Ganyu and Xiamen) of S. ommaturus were measured by Inductively Coupled Plasma Mass Spectrometry and regressed against otolith weight. No significant correlation between otolith weight and concentrations of Na, Mg, Ca, Sr, Co, Ba, Zn and Pb were observed. Concentrations of K and Mn were correlated with otolith weight. Consequently, the residuals of the regressions were used instead of the original concentrations in subsequent analyses. Analysis of variance (ANOVA) showed no significant difference between males and females in otolith chemical signatures. Differences were found among the locations for K, Sr, Mn, Co, Ba, Pb, but not for Ca, Na, Mg and Zn. Residuals of the regressions of elemental concentrations against otolith weight that fitted the normal distribution and homogeneity were studied by discriminant analysis. The success of the discriminant function to predict the location of S. ommaturus capture ranged from 100% for Weihai and Xiamen stocks, to only 44.4% and 62.5% for Qingdao and Dandong stocks, respectively. The average prediction success was 80.3%.  相似文献   

Spatial-temporal pattern and differences of land use changes in the Three Gorges Reservoir Area of China during 1975�C2005     

Yingui Cao  Wei Zhou  Jing Wang  Chun Yuan 《山地科学学报》2011,8(4):551-563

Regional land use changes are an important part of global changes. The research on land use changes in the Three Gorges Reservoir Area of China attracts a lot of attention owing to the Three Gorges Dam building. The Three Gorges Reservoir Area becomes one of the important research areas. This study analyzed the transforming processes and traits of each land use type and the regional differences of land use changes during the past 30 years, summarized the distribution of different land use types in different buffer zones and regresses the equation areas and different buffer distances based on buffer analyses and regression analyses, and then analyzed the transforming rules in different buffer distances, got the optimal influence distances. The research results indicate that, (1) cultivated land lies at the northwest of the reservoir and was decreasing, however, the construction land was increasing, especially the urban construction land, a large number of land was flooded because of the reservoir water level rise; (2) urban area was sprawling quickly in developed and neighboring areas, and a great deal of cultivated land and a considerable amount of grassland were occupied; in the earlier time, rural settlements occupied lots of cultivated land and a sum of forestry land in the later time; (3) the optimum influenced distances for cultivated land and forestry land were 10–35 km, and for urban and rural settlements were in 5–20 km. Overall, this research can reflect the spatial-temporal characteristics of land use changes during the 30 years, and it is helpful for urban planning and land use planning in the reservoir area.  相似文献   

FBG温度低敏传感器在大型钢结构施工监测中的运用     

周元  曹海军 《岩土工程技术》2015,(1):51-54

目前在桥梁、钢结构等表面应力监测领域中,光纤光栅因具有抗电磁干扰能力强、灵敏度高、环境适应能力强、使用寿命长等优点,已经成为一种新的先进监测、检测手段,但FBG波长随温度变化而产生的漂移往往严重影响监测系统的性能,因此需要对FBG进行温度补偿。介绍了一种新型的FBG传感器并结合具体的工程项目,论述了其温度低敏技术能精确地剔除温度对应变的影响,实现结构物的长期健康监测。  相似文献   

羌塘盆地羌资5井二叠系展金组烃源岩基本特征   总被引：2，自引：1，他引：1  

曹竣锋  宋春彦  付修根  陈明  郑博  孙伟 《海相油气地质》2015,(2)

前人对羌塘盆地的烃源岩研究资料主要来源于中生界地表露头,少见古生界的。对羌资5井二叠系展金组烃源岩的钻井岩心研究表明,其有机碳含量高,平均值达到1.15%,属于好烃源岩。干酪根显微组分主要为Ⅲ型,其次为Ⅱ2型;有机质主要来自于海相低等水生生物,热演化已达到成熟阶段。烃源岩具较好的生气能力。认为井下烃源岩样品虽显示其处于有机质演化成熟阶段,但因受后期构造抬升的影响,推测二叠系深部未知的烃源岩可能尚处于高成熟—过成熟阶段。羌塘盆地二叠系具有较好的勘探前景,油气勘探可向深部古生界开展。  相似文献   

徕卡全站仪GSI数据格式转换模块设计     

岳超 《安徽地质》2015,(1):73-75

基于全站仪的数字测图是获取地理空间信息数据的重要手段,由于全站仪品牌不同,其数据格式区别较大,且不能直接导入到成图软件中。本文对徕卡系列全站仪数据存储所采用的GSI-8格式进行了分析,介绍了GSI-8转CASS7.0所需的*.dat格式的原理,给出了程序实现的核心代码,利用实例数据对数据格式转换模块进行了验证。本文所介绍的文件格式转换方法对于测量中其它数据格式的转换具有一定的参考意义。  相似文献   

浅谈水文地质参数的计算与应用   总被引：1，自引：0，他引：1  

曹会  焦志亮  符亚兵 《岩土工程技术》2015,(2):73-75,99

结合多个场地的抽水试验和室内试验资料,分析评价了工程勘察中不同水文地质参数的应用范围及在参数求取过程中应注意的问题,根据实测数据得出野外抽水试验渗透系数是室内渗透试验所测得的10~14倍,影响半径约为裘布依影响半径的5.8~17.7倍;分析了产生这种情况的原因,指出在工程实践中应根据不同的要求选取不同方法计算得出的水文地质参数;针对导水系数、释水系数及给水度在计算及应用过程中应注意的问题进行了评述。  相似文献   

云南个旧白沙冲和北炮台花岗岩岩石学、地球化学研究及成因探讨   总被引：1，自引：0，他引：1       下载免费PDF全文

李肖龙  毛景文  程彦博 《地质论评》2011,57(6):825-836

白沙冲岩体和北炮台岩体均位于个旧矿田的东区北段.白沙冲岩体岩性主要为黑云母花岗岩,而北炮台岩体岩性主要为似斑状黑云母花岗岩.本文通过对白沙冲岩体、北炮台岩体进行岩石学、地球化学、Nd、Sr同位素研究,厘定白沙冲岩体属过铝质的高钾钙碱性花岗质岩石,北炮台岩体属准铝质的钾玄岩系列花岗岩.两岩体均表现出亏损Ba、Sr、Nb、...  相似文献