期刊文献+
共找到7篇文章
< 1 >
每页显示 20 50 100
安徽省东至县兆吉口铅锌矿地球物理特征及成矿机理浅析 被引量:1
1
作者 杨永中 《西部资源》 2019年第5期42-43,共2页
通过对研究区地质特征及地球物理特征分析,认为矿床成因属于与燕山晚期岩浆活动有关的浅成低温热液型铅锌矿床。矿石工业类型为硫化物铅锌矿矿石,矿石自然类型为含铅锌角砾岩、含铅锌碎裂岩、网脉状铅锌矿矿石、块状铅锌矿石。
关键词 兆吉口 铅锌矿 球物理特征
下载PDF
云南省永德县大麦地锡、铅、锌多金属矿区地球物理特征
2
作者 刘爱民 胡斌 《科技信息》 2010年第21期J0027-J0028,共2页
通过矿区地球物理场、物性参数及局部异常特征圈定矿化蚀变带及金属硫化物富集地段。
关键词 大麦地 物理特征 矿化蚀变带 金属硫化物富集地段
下载PDF
AVO Character Research of Natural Gas Hydrates in the East China Sea 被引量:1
3
作者 LIU Huaishan HUANG Guangnan HE Yi TONG Siyou CUI Shuguo ZHANG Jin 《Journal of Ocean University of China》 SCIE CAS 2009年第3期270-276,共7页
Natural gas hydrates are considered as strategic resources with commercial potential in the 21st century. Obvious BSR characteristics will be shown on seismic profiles, if there exist natural gas hydrates. The AVO met... Natural gas hydrates are considered as strategic resources with commercial potential in the 21st century. Obvious BSR characteristics will be shown on seismic profiles, if there exist natural gas hydrates. The AVO method is one of the methods which can be used to identify and forecast lithologic characteristics and fluid properties by using the relationship between Amplitude and Offset. AVO anomaly is one of the significant signs to check out whether or not there is free gas below the BSR, so it can be used to detect natural gas hydrates from the seismic profile. Considering the geological and geophysical characteristics of the Okinawa Trough and making use of the techniques mentioned above, we can conclude that the conditions there are favorable for the formation and concentration of natural gas hydrates. By analyzing the data collected from the study area, one can discover many different anomalous phenomena on the seismic profile which are related to the existence of natural gas hydrates. Preliminary estimation of the natural gas hydrates in the Okinawa Trough shows that the trough is rich in natural gas hydrates and may become a potential important resources exploration area. 展开更多
关键词 natural gas hydrates free gas blank zone Okinawa Trough
下载PDF
Joint inversion of gravity and multiple components of tensor gravity data 被引量:3
4
作者 鲁光银 曹书锦 朱自强 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第7期1767-1777,共11页
Geological structures often exhibit smooth characteristics away from sharp discontinuities. One aim of geophysical inversion is to recover information about the smooth structures as well as about the sharp discontinui... Geological structures often exhibit smooth characteristics away from sharp discontinuities. One aim of geophysical inversion is to recover information about the smooth structures as well as about the sharp discontinuities. Because no specific operator can provide a perfect sparse representation of complicated geological models, hyper-parameter regularization inversion based on the iterative split Bregman method was used to recover the features of both smooth and sharp geological structures. A novel preconditioned matrix was proposed, which counteracted the natural decay of the sensitivity matrix and its inverse matrix was calculated easily. Application of the algorithm to synthetic data produces density models that are good representations of the designed models. The results show that the algorithm proposed is feasible and effective. 展开更多
关键词 hyper-parameter regularization full gravity gradient tensor preconditioned matrix Occam's inversion focusinginversion
下载PDF
Wavelet Analysis in Volcanology: The Case of Phlegrean Fields
5
作者 Giuseppe Pucciarelli 《Journal of Environmental Science and Engineering(A)》 2017年第6期300-307,共8页
The Phlegrean Fields are an area in the west of Naples (Italy), with a huge interest in geophysical community being a volcanic caldera among the most dangerous in the world. Various techniques of monitoring exist. A... The Phlegrean Fields are an area in the west of Naples (Italy), with a huge interest in geophysical community being a volcanic caldera among the most dangerous in the world. Various techniques of monitoring exist. Among all, the control of ground deformations and variations in sea level has considerable importance. Time series of ground deformation and tidal data in this area have been analysed to highlight these important geophysical features and these results are compared with those obtained from similar data in other time periods. With regard to first mentioned, tiltmetric data have been analysed. These ones come from the tiltmeter network sited in Pozzuoli. Instead, the tidal data come from the tide gauge in Pozzuoli. Data have been analysed by means of a wavelet approach, using a Continuos Wavelet Transform and using, as so-called "Wavelet Mother", a Gabor-Morlet wavelet. For each time series, the principal harmonic constituents result: lunar semidiurnal (M2), solar semidiumal (S2) and lunar diurnal (K1). Other harmonic constituents, having frequencies higher than 1/hour, are present.These last ones could be interpreted as seiches and they could be linked up with generation of discrete plumes of rising magma. Frequencies at which there is the occurrence of these seiches are in agreement with previous studies. 展开更多
关键词 Phlegrean Fields wavelet analysis TILTMETER TIDES seiches.
下载PDF
Bicharacteristic Curves in Modeling of the Earth Crust and Upper Mantle
6
作者 Georgi Boyadzhiev 《Journal of Mathematics and System Science》 2014年第3期167-172,共6页
The aim of this paper is the introduction of a new approach to 3D modelling of elastic piecewise homogeneous media, in particular Earth crust and upper Mantle. The method is based on the principle of tomography with E... The aim of this paper is the introduction of a new approach to 3D modelling of elastic piecewise homogeneous media, in particular Earth crust and upper Mantle. The method is based on the principle of tomography with Earthquake as a source of the signal and receiver stations on the surface. The wave propagation in solid media is described by a system of three strongly coupled hyperbolic equations with piece - wise constant coefitients. The characteristic set and hi-characteristic curves of this system are computed in a homogeneous half-space with free boundary and the formulae of reflection and diffraction of the hi-characteristics on the internal boundaries of the media. Applications of the characteristic set and bi-eharacteristic curves for the inverse problem in geophysics and Earth modelling are given. 展开更多
关键词 3D modeling of Lithosphere BICHARACTERISTICS strongly coupled linear systems of PDE
下载PDF
New Books
7
《China's Tibet》 2017年第5期71-71,共1页
The Geology and Landform of Hoh Xil and Its Evolution This book is edited by Li Jianghai,Wencheng,and Liu Chiheng,and narrates the geology and landform of Hoh Xil.With a large number of photos,this book provides reade... The Geology and Landform of Hoh Xil and Its Evolution This book is edited by Li Jianghai,Wencheng,and Liu Chiheng,and narrates the geology and landform of Hoh Xil.With a large number of photos,this book provides readers with detailed information about topographical features including highland glaciers,lakes,rivers,and plains.Experts apply remote sensing technology,geophysics,and on-site investigations to study Hoh Xil’s structural makeup,model its fractured terrain,and perform a myriad of other analyses. 展开更多
关键词 geophysics fractured terrain geology landform New Books apply scholar heritage Happy
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部