Abstract we present two methods for inverting surface gravity data to recover a 3d distribution of density contrast. Brandon dugan, associate department head, baker hughes chair of petrophysics and borehole. Brandon dugan, associate department head, baker hughes chair of petrophysics and borehole geophysics. Yaoguo li master of science thesis geophysics center for wave phenomena colorado school of mines golden, colorado 80401 303. Yaoguo serves as an associate editor of the journal. Depositional sequence characterization based on seismic variational mode decomposition. A report to the consortium of universities for the advancement of hydrologic sciences, inc. Colin g farquharson, douglas w oldenburg, yaoguo li. I would like to express my deepest gratitude to my research advisor, professor yaoguo li, for his guidance, supportive encouragement, and useful critiques of my thesis work. Journal of applied geophysics vol 42, issue 2, pages 71. Oldenburg abstract we present a method for inverting surface magnetic data to recover 3d susceptibility models.
Yaoguo li is a professor in the department of geophysics at the colorado school of mines, and director of the center for gravity, electrical and magnetic studies cgem. Journal of geophysics and engineering 12 4, 577586. When an electric current is introduced to the earth, it sets up a distribution of charges both. He is specialized in geophysical inversion methods for potentialfield, dcip, and electromagnetic data.
Forward modeling and inversion of potential field data using. Keck distinguished professor of professional development education. Sarah shearer and yaoguo li gravity and magnetics research consortium, department of geophysics, colorado school of mines summary inversion of magnetic data has long been hampered by the need to specify the direction of magnetization. Case histories and advances have been presented at professional conferences, but most have not been published in a scienti. Ground penetrating radar, magnetics, conductivity mapping, resistivity profiling, seismic reflectionrefraction. Independent validation of remotely sensed observations. This paper also ranked in the top 25 papers presented at the houston meeting. A new technique is proposed to process 2d apparent resistivity datasets, in order to obtain a fast and contrasted resistivity image, useful for a rapid data check in field or as a starting model to constrain the inversion procedure.
I would also like to thank the members of my thesis committee, professors thomas davis and andrei swidinsky, without whose knowledge and assistance this study would not have. Exploration geophysics is published by csiro publishing on behalf of the australian society of exploration geophysicists. He currently leads the gravity and magnetics research consortium gmrc sponsored by the petroleum and mining industry. Colorado school of mines home department of geophysics. It is a broad subject that encompasses many of the major sciences physics, astronomy, planetary science, geology, environmental science, oceanography, and meteorology. Use updown arrow keys to increase or decrease volume. Many different scientists from different disciplines class themselves as geophysicists, including seismologists. A vision for geophysics instrumentation in watershed. This download page contains the pdf presentation from the short course. Thanks to each of you for sharing your time and expertise. Papers published report the results of significant case histories and relevant original research in geophysics, with emphasis on the australian and similar environments. Oldenburg and yaoguo li ubcgeophysical inversion facility department of earth and ocean sciences, university of british columbia. Short course interpretation of gravity and magnetic data.
Advanced uxo detection and discrimination using magnetic data based on extended euler deconvolution and shape identification through multipole moments. When an electric current is introduced to the earth, it sets up a distribution of charges both on and beneath the earths surface. Yaoguo li professor, geophysics director, center for gravity, electrical and magnetic studies. A vision for geophysics instrumentation in watershed hydrological research. Approximate inverse mappings in dc resistivity problems. Mining geophysics geophysical inversions applied to 3d geology characterization of an iron oxide coppergold deposit in brazil aline tavares melo, jiajia sun, and yaoguo li. Home center for gravity, electrical and magnetic studies.
A 1day short course presenting the state of art and practice in 3d inversionbased quantitative interpretation of gravity and magnetic data. Quantitative geophysical interpretation of gravity. Quantitative geophysical interpretation of gravity gradient. Geophysics, wuhan college of geology, 1983 a thesis submitted in partial fulfillment of the requirements for the degree of doctor of philosophy in the faculty of graduate studies department of geophysics and astronomy we accept this thesis as conforming to the required standard the university of british columbia march 1992. Geophysics advisory group was formed in the summer of 2005 and has subsequently evolved in membership. We present a general approach that utilizes the minimal dependence on. Misac nabighian colorado school of mines agnetometry has emerged as one of the most efficient and costeffective methods for. This book explains the following topics in geophysics. Journal of geophysics and engineering 12 4, 577586, 2015.
Volume 42, issue 2 pages 716 october 1999 download full issue. Articles in press latest issue article collections all issues submit your article. Their combined citations are counted only for the first. Some specific names you might know are peter mcgillivary, yaoguo li, eldad haber, peter fullagar, david lumley, and david aldridge but there are a host of others. To view the rest of this content please follow the. Csm geophysicists honored at 2006 seg meeting csm geophysicists honored at 2006 seg meeting best paper in geophysics in 2005 best student poster paper at 2005 annual meeting.
To allow the maximum flexibility for the model to represent geologi. Forward modeling and inversion of potential field data. Yaoguo li colorado school of mines, rick miller kansas state geologi. In the past some modifications to the backprojection algorithm, as well as the use of filtering techniques for the sensitivity matrix were proposed. Yaoguo li associate professor department of geophysics colorado school of mines 1500 illinois street golden, colorado 80401 phone. Prestack imaging of seismic data using l p iterative reweighted leastsquares wavefield extrapolation filters in the frequencyspace domain. Free geophysics books download ebooks online textbooks. Geological survey, yaoguo li colorado school of mines, rick miller kansas state. Journal of applied geophysics vol 42, issue 2, pages 716. A fast imaging technique applied to 2d electrical resistivity.
Clink on the download link and enter the provided password. Tuesday, september 17 contd time session room presenters title 3. Terence young doctoral thesis geophysics center for wave phenomena colorado school of mines golden, colorado 80401 303. Yaoguo li yaoguo li received his bsc in geophysics from the wuhan college of geology in 1983, and a phd in geophysics from the university of british columbia in 1992.
We thank yaoguo li and the center for gravity, electrical, and magnetic studies for use of inversion software. Pdf geology differentiation of geophysical inversions using. Summary in this paper wavelet transforms and a logarithmic barrier method are applied to the inversion of large. Gravimetry, newtons law of gravitation, gravity effect of selected bodies, magnetometry, magnetism of rocks and minerals, magnetic measurements for an archaeological prospection, geoelectrical methods. This cited by count includes citations to the following articles in scholar. Geophysics is the application of physics to study the earth, oceans, atmosphere and nearearth space. Your early research in seismic impedance inversion led to the creation of the software package inverse theory and applications ita and i know at one time it was used to process. With data volumes and computing being central to 21st century geophysics, we are including probability and statistics, linear algebra, data analytics, and two geophysics computing courses to the curriculum.
Gravity gradiometry and seismic interpretation integration. Yaoguo li centre for gravity, electrical, and magnetic studies, department of geophysics, colorado school of mines. Their combined citations are counted only for the first article. My research interests are in inverse theory and its application in the interpretation of geophysical data sets arising from resources exploration and production, environmental, and groundwater problems. He is currently an associate professor of geophysics at the colorado school of mines and leads the center for gravity, electrical, and magnetic studies cgem and the gravity. Yaoguo li department of geophysics and astronomy, university of british columbia, 2219 main mall, vancouver, canada v6t 1z4 search for other works by this author on.
Available online via digital collections of colorado. Snieder, keck foundation professor of professional development education. Reduction of distortion and improvement of efficiency for gridding of scattered gravity and magnetic data. Pdf geology differentiation of geophysical inversions. Interpretation of earths and other planetary interiors and their dynamics.
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