土壤pH值及CaCO3在多目标地球化学调查中的研究意义   总被引：8，自引：0，他引：8  

朱礼学 《四川地质学报》2001,21(4):226-228

重点阐述了土壤pH值，CaCO3含量与土壤矿质元素活化之间的制约机理，从而论述了多目标地球化学调查要实现服务于农业，服务于生态环境保护的目标，就必须加强对土壤pH值及CaCO3含量调查研究。  相似文献   

试论吉林省天然矿泉水资源及其价值   总被引：3，自引：0，他引：3  

滕继奎 《吉林地质》2001,20(3):50-53

吉林省天然矿泉水资源十分丰富 ,在全国占有重要地位。本文根据大量的实际资料 ,从理论上对矿泉水的形成机制和分布规律进行了探讨。同时从矿泉水的资源属性出发 ,对其价值问题提出了新的认识。  相似文献   

Geochemistry, mineralogy, and technological properties of the main Stephanian (Carboniferous) coal seams from the Puertollano Basin, Spain     

A. Alastuey  A. Jimnez  F. Plana  X. Querol  I. Surez-Ruiz 《International Journal of Coal Geology》2001,45(4)

This study is focused on the occurrence and distribution of mineral matter and major and trace elements in the high volatile bituminous coal from Puertollano (south-central Spain). The relationship between ash behaviour and inorganic composition, as well as the possible formation of fouling and slagging deposits in boilers during the conversion process, were investigated. The Puertollano coals do not exhibit plastic properties, despite their rank, probably because of their high ash and inertinite contents.The Puertollano coal has medium to low total S content (0.48% to 1.63% db, with a mean of 1.0% db) and is characterised by relatively high contents of Si, Pb, Sb, and Cs. Some elements such as As, Cd, Co, Cr, Cu, Ge, Li, Mn, Ni, W, and Zn are also present in relatively high contents. The enrichment in a number of heavy metals could be attributed to the common sulphide ores occurring near the Puertollano coal deposit.The following trace elements affinities are deduced: (a) sulphide affinity: As, Co, Cd, Cu, Ni, Sb, Tl, and Zn; (b) aluminum–silicate affinity: K, Ti, B, Co, Cr, Cs, Cu Ga, Hf, Li, Nb, Rb, Sn, Ta, Th, V, Zr, and LREE; (c) Carbonate affinity: Ca, Mg, Mn, and B; (d) organic affinity: B.The very high Si levels and the anomalous enrichment in Cs, Ge, Pb, Sb, and Zn shown by the Puertollano coals account for the high contents of these elements in the Puertollano fly ash when compared with the other Spanish coal fly ashes.The chemical composition of the high temperature ash (HTA) is consistent with the trend shown by the ash fusion temperatures (AFT) and also with the predictive indices related to slagging and fouling propensities. Thus, the ash fusion temperatures increase with high values of Al₂O₃ as well as with the decrease in Fe₂O₃, CaO, and MgO.  相似文献   

长春地震台大震速报震级偏差研究   总被引：1，自引：0，他引：1  

陈俊杰  张兴科  乔兵  王军亮  蔡宏雷  刘冰冰  宣立成 《东北地震研究》2001,17(3):15-19

本次研究选用了本台 2 0 0 0年全年的速报地震资料 ,重新测算了DK 1地震仪各分向记录的面波震级 ,并以《中国地震速报台网观测报告》给出的震级为标准震级 ,进行了震级偏差统计分析。研究结果表明 ,以长春台DK 1地震仪水平向高倍档记录测算的面波震级平均偏低 0 1 1 ,标准误差为± 0 2 1 ;以水平向低倍档记录测算的面波震级平均偏高 0 1 0 ,标准误差为± 0 2 0 ;以垂直向记录测算的面波震级平均偏低 0 2 4,标准误差为± 0 2 6。通过对统计结果的全面分析 ,分别给出了长春台DK 1地震仪水平向高低倍档和垂直向记录测算面波震级的台站校正值。  相似文献   

岩石非均匀性对超声衰减的影响及其修正   总被引：4，自引：0，他引：4  

王宝善  孙道远  李生杰  李伟东  施行觉  刘斌 《中国地震》2001,17(1):1-7

在充分考虑了岩石的非均匀性引起的Rayleigh散射对衰减测量值的影响后，通过有关理论和计算，将岩石的本征衰减和散射加以区分，对原先以均匀介质为基本假定的频谱比法进行了修正，改进后的频谱比法可在较宽的频率范围内进行Q值计算，避免了传统频谱比法在不同频段上得出不同的Q值的不确定性问题，同时，我们还引进并改进了频率移动法，我们将传统和改进的频谱比法，以及频率移动法应用于同一套实验数据，计算结果符合较好。  相似文献   

THE TECHNIQUE OF QUASI-LOSSLESS COMPRESSION OF THE REMOTE SENSING IMAGE     

HU Qingwu XUAN Jiabin 《地球空间信息科学学报》2001,4(1):50-55

1　ＩｎｔｒｏｄｕｃｔｉｏｎＷｉｔｈｔｈｅｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆａｅｒｉａｌａｎｄｓｐａｃｅｒｅｍｏｔｅｓｅｎｓｉｎｇｔｅｃｈｎｉｑｕｅ,ｔｈｅｄｉｇｉｔａｌｃａｍｅｒａｈａｓｂｅｅｎｅｘｐｌｏｒｅｄ ,ａｎｄｍａｐｐｉｎｇｅｘｐｅｒｉｍｅｎｔｓｗｉｔｈｔｈｉｓｋｉｎｄｏｆｄｉｇｉｔａｌｉｍａｇｅｓａｒｅｂｅｉｎｇｐｒｏｃｅｓｓｅｄａｓｔｈｅｒｅｇｕｌａｒｍｏｄｅｏｆａｒｅｏｐｈｏｔｏｇｒａｍｍｅｔｒｙ .Ｏｎｔｈｅｏｔｈｅｒｈａｎｄ ,ｔｈｅｔｅｃｈｎｉｑｕｅｏｆｉｎｔｅｇｒａｔｉｏｎｏ…  相似文献   

高峰100号矿体微量元素特征     

苏亚汝  李蘅  邓金灿  任基林 《矿产与地质》2001,15(5):361-365

高峰100号矿体微量元素特征研究结果表明矿物的形成受花岗岩和地层双重制约。  相似文献   

南极中山站和北京十三陵台标度值的讨论     

杨友华  汪阳 《地震地磁观测与研究》1995,16(5):54-57

通过处理南极中山站的地磁资料与北京十三陵台对比，发现在磁场扰动时，仪器的标度值Ｓ＝Ｈ×２Ｉ÷Ｎ有误差产生，提出了对中山站仪器标度值误差的改进方法。减少了误差，提高了资料的准确度。  相似文献   

地震活动性的层次模型及推导的地震活动经验公式和分维性质   总被引：1，自引：0，他引：1  

陈荣华  罗灼礼 《中国地震》1995,11(2):116-120

文章从一个简单的地震活动层次模型出发，推导地震活动性中几个经验公式以及地震活动的时、空和震源大小分维性质。研究结果表明：（１）震级和频度关系式即Ｇｕｔｅｎｂｅｒｇ－Ｒｉｃｈｔｅｒ公式中的比例系数ｂ值等于震级和平均震中距关系式中的比例系数ｂ１的２倍，并且ｂ值也等于震级和平均时间间隔关系式中的比例系数ｂ２。（２）平均震中距分维值为２，平均时间间隔分维值为１，震源大小分布的分维值的２ｂ。  相似文献   

Experimental and theoretical determination of concentration profiles and influence of particle characteristics in blowing snow     

M. Naaim  H. Martinez 《Surveys in Geophysics》1995,16(5-6):695-710

Snow drift transport may cause avalanches on the roads during the periods of snowfall and strong wind. To better understand the factors influencing transport we have developed a theoretical model. This model is based on the boundary layer theory, where the particle mass conservation is considered. Assuming that the saturation is reached, the concentration profile can be represented by a negative exponential law. By means of this analysis, the influence of particle characteristics is explored through the roles of threshold friction velocity and fall velocity. Using fluid mechanics laws, an analysis of the concentration profile resulting from the effect of the wind on a particle bed was also developed. For several velocities of flow and for different kinds of particles an experimental determination of the concentration profile was achieved. We used a laser visualisation and image processing technique to carry out these experiments. The obtained results fit with the values predicted by the theoretical model.  相似文献