半干旱草原浅覆盖区手持钻机化探取样技术的应用及探索     

周增辉 《地质与勘探》2021,57(2):360-369

浅层钻探技术是覆盖区化探取样技术研究的新方向。手持钻机是轻便钻机的一种。为了探索手持钻机的化探取样效果,以内蒙古拜仁达坝银铅锌矿区为代表的大兴安岭南部半干旱草原浅覆盖区作为研究区,采用回转式和冲击式手持钻机开展浅钻化探取样试验,分析该方法相对于常规化探方法的优势。结果表明,浅钻化探取样具有方便快捷、效率较高、成本较低等优点。通过对比两类钻机的钻进、取样工艺及效果,分析总结两类钻机对于草原覆盖区不同覆盖物的适用性及存在问题,为覆盖区浅钻化探技术和取样钻机的发展和推广提供借鉴和参考。  相似文献   

无人艇载高清多光谱影像配准     

吴军  曹延生  杨海生  刘志刚 《遥感学报》2012,16(3):625-643

针对无人艇载高清多光谱影像特性,提出了集成单应性矩阵内配准与置平薄板样条外配准的多光谱影像整体配准方案:(1)傅里叶-梅林变换引导下的多光谱影像相关匹配自动生成连接点;(2)单应性矩阵最小二乘联合估计实现多波段影像相互配准(内配准);(3)构建“置平”薄板样条变换模型实现多光谱影像序列无地理坐标配准(外配准),最后对无人飞艇搭载多CCD相机低空拍摄的高清多光谱影像进行配准验证,取得了约1个像元误差的内配准精度以及较好的外配准视觉质量。  相似文献   

薄层色谱-光密度法分离分析原油族组成   总被引：1，自引：0，他引：1  

魏志福  邹艳荣  蔡玉兰  陶伟 《地球化学》2010,39(4):381-385

以微型柱色谱为基础,分离原油样的族组成。用薄层色谱扫描仪测定各组分的光密度,建立与柱色谱之间映射关系,计算出各组分的含量和原油的族组成。通过比较发现,薄层色谱测定结果与微型柱色谱吻合较好,且具有分离效果好、灵敏度高、操作简便、快速等优点。对于含蜡量较高的样品,薄层色谱一光密度法测定的原油族组成更精确。  相似文献   

时频分析方法在薄储集层横向预测中的应用   总被引：4，自引：0，他引：4  

张玉芬  熊维纲 《地质科技情报》1995,14(1):83-88

时频分析是根据地震响应的时频变化规律研究薄互层结构的一种方法。本文应用时频分析方法的基本原理，总结出不同厚度、不同岩性组合的地层的时频响应特征，对连井地震剖面时频分析方法进行了处理和解释，得到了较为满意的解释结果。  相似文献   

A laboratory study of teleseismic Pn waves     

Shi-Yu Gao  Shan Ding 《地震学报(英文版)》1993,6(2):511-516

In this paper, the influences of mechanical properties of low velocity layers and thickness of high velocity layers in the lower lithosphere on the horizontal propagaties of seismic waves are discussed by means of altrasonic seismic model experiments; It is shown that the structure of the lower lithosphere consisting of soft low velocity layers and thin high velocity layers is favourable for the horizontal propagation of seismic energy, therefore, it is a very possible structure pattern of the lower lithosphere responsible for Pn and later high velocity arrivals observed in long range distances; Such pattern is also consistent with studies of rheological stratification of the lower lithosphere beneath mid-ocean-ridges and continental rifts. The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 97–102, 1993. The project is supported by the Chinese joint Seismological Science Foundation.  相似文献   

Geomagnetic depth sounding over the Singhbhum and the surrounding regions of eastern India     

A. N. Hanchinal  P. B. V. Subba Rao  Nandini Nagarajan  D. R. K. Rao  B. P. Singh 《Journal of Earth System Science》1994,103(3):383-400

Magnetovariational studies have been carried out in Singhbhum and surrounding regions during 1987 and 1989. Three deep-seated linear conductors have been identified. One of them is located to the north of Ranchi, Bokaro and Purulia extending in E-W direction coinciding with high heat flow region and Gondwana sediments. The trend of anomaly at Ranchi and Purulia at longer periods suggests a conductivity anomaly due to the mafic and ultramafic intrusions, considered to be responsible for the uplift of Chhotanagpur plateau. The second conductor is associated with the basin margin fault that separates the Singhbhum craton and Chhotanagpur plateau from the West Bengal basin. This conductive zone appears to extend further south and join the high heat flow region of Attri-Tarabalo. This conductor could be isolated only after eliminating the coast effect from the observed induction vectors. The third conductive zone follows the trend of Mahanadi valley located south of the Sukinda thrust. Conductive anomaly associated with the Sukinda and Singhbhum thrust zones could not be resolved due to the interference from neighbouring conductive structures. These two thrusts may not be very deep-seated structures. The Singhbhum granite batholith is found to be highly resistive and seems to extend to greater depths.  相似文献   

石油地震勘探中薄互层的反射系数序列振幅谱特征分析   总被引：4，自引：0，他引：4       下载免费PDF全文

张玉芬  熊维纲 《地球科学》1994,19(5):685-693

通过对一层、二层及多层，厚度为有序递度的薄互层组地震地质模型的反射数系列振幅谱特征与薄互层组内单层厚度，子结构厚度，互层组内层数等关系分析，指出薄互层组内单层厚度或子结构度是决定反射系数序列振幅谱特征的基础，互层纳内层数是主要的影响因素。  相似文献   

Elastic-wave scattering and Stoneley wave localization by anisotropic imperfect interfaces between solids     

W. Huang  S. I. Rokhlin 《Geophysical Journal International》1994,118(2):285-304

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石油地震勘探中的薄层解释研究方法综述     

张玉芬  熊维纲 《地质科技情报》1993,12(4):81-88

概述了当前石油地震勘探中薄层研究的下列主要方面:关于薄层的标定,主要方法有垂直地震剖面法、理论合成记录法、平均速度法和多档滤波法;薄层厚度求取的主要方法有:相对振幅—时间厚度法、间接振幅法、反射波特征点法、积分振幅与视时差乘积法、窄带滤波法以及标定曲线法和振幅谱能量等方法;薄储集体圈定及横向预测,主要着重于由界面型剖面向岩层型剖面转换方法的研究,如:地震岩性模拟技术、合成声波测井等方法。  相似文献   

Unravelling the spirals: a serial thin-section study and three-dimensional computer-aided reconstruction of spiral-shaped inclusion trails in garnet porphyroblasts   总被引：1，自引：0，他引：1  

S. E. JOHNSON 《Journal of Metamorphic Geology》1993,11(5):621-634

Abstract Seventy-seven spatially orientated, serial thin sections cut from a single rock reveal changes in the geometry of spiral-shaped inclusion trails (SSITs) in garnet porphyroblasts. The observed SSITs are doubly curved, non-cylindrical surfaces, with total inclusion-trail curvature decreasing systematically from the cores to the rims of porphyroblasts. The three-dimensional geometry of the SSITs, reconstructed with the aid of computer graphics, shows that the orientations of spiral axes defined by the SSITs are not related in any expected nor predictable way to the main foliation in the matrix. This suggests continued deformation after or during the latest stages of porphyroblast growth, which has important implications for the use of SSITs as shear-sense indicators. Whether the formation of SSITs involves significant porphyroblast rotation with respect to a geographically fixed reference frame cannot be determined from the available data.  相似文献