Three-dimensional geologic structure of a Mesozoic granite pluton and related metallogeny in Northeast China: An integrated geophysical model

2017 ◽  
Vol 53 (6) ◽  
pp. 2569-2578
Author(s):  
Ming Zhu ◽  
Lin-Fu Xue ◽  
M. Santosh ◽  
Yan-Ni Ma ◽  
Yuan Chai ◽  
...  
Keyword(s):  
Northeast China ◽  
Three Dimensional ◽  
Geologic Structure ◽  
Granite Pluton ◽  
Geophysical Model ◽  
Mesozoic Granite

Basic theory of three-dimensional landslide modeling based on the logical model of geologic structure

Landslides ◽  
2005 ◽  
Vol 2 (3) ◽  
pp. 212-220 ◽  
Author(s):  
A. Kajiyama ◽  
K. Shiono ◽  
S. Masumoto ◽  
T. Fujita
Keyword(s):  
Three Dimensional ◽  
Basic Theory ◽  
Geologic Structure ◽  
Logical Model ◽  
Landslide Modeling

On: “Seismic contouring: A unique skill” by P. M. Tucker (GEOPHYSICS, 53, 741–749, June 1988).

Geophysics ◽  
1989 ◽  
Vol 54 (2) ◽  
pp. 267-270
Author(s):  
Donald S. Stone
Keyword(s):  
Seismic Data ◽  
Three Dimensional ◽  
Geologic Structure ◽  
High Expectations ◽  
Structural Interpretation

As a happy owner of the popular SEG monographs by Tucker and Yorston (1973) and Tucker (1982), the appearance of Tucker (1988) as the leadoff article in the June, 1988 issue of Geophysics caught my attention, and I began reading with high expectations. Admitting that the paper was chiefly about the philosophy and mechanics of contouring seismic data, I nevertheless found it disappointing, primarily because in describing his unique seismic contouring skill, Tucker never mentions migration or its importance in the conversion of raw seismic times to three‐dimensional (3-D) geologic structure. Also, many of the statements in his paper can be challenged on the grounds of imprecision or omission in terms of real structural interpretation.

A three-dimensional hydrogeological–geophysical model of a multi-layered aquifer in the coastal alluvial plain of Sarno River (southern Italy)

2013 ◽  
Vol 22 (3) ◽  
pp. 691-703 ◽  
Author(s):  
R. Di Maio ◽  
S. Fabbrocino ◽  
G. Forte ◽  
E. Piegari
Keyword(s):  
Southern Italy ◽  
Three Dimensional ◽  
Alluvial Plain ◽  
Geophysical Model ◽  
Sarno River

A three-dimensional geophysical model of the Earth’s crust in the central part of the Karelian Craton

2015 ◽  
Vol 463 (2) ◽  
pp. 808-812 ◽  
Author(s):  
I. K. Pashkevich ◽  
A. S. Savchenko ◽  
V. I. Starostenko ◽  
N. V. Sharov
Keyword(s):  
Three Dimensional ◽  
Earth’S Crust ◽  
Karelian Craton ◽  
Geophysical Model ◽  
Earth's Crust

Numerical experiments with a salt dome

Geophysics ◽  
1989 ◽  
Vol 54 (8) ◽  
pp. 1042-1045 ◽  
Author(s):  
Irshad R. Mufti
Keyword(s):  
Numerical Experiments ◽  
Three Dimensional ◽  
Salt Dome ◽  
Model Structure ◽  
Two Dimensional ◽  
Geologic Structure ◽  
Cross Sectional ◽  
Salt Domes ◽  
D Model

A salt dome is a familiar example of a three‐dimensional (3-D) geologic structure. Surprisingly, most of the literature devoted to the investigation of salt domes deals only with cross‐sectional views of the domes. This is particularly true for seismic work. A notable exception is the work of French (1974) which discusses inaccuracies in focusing introduced by performing two‐dimensional (2-D) migration of data obtained over a 3-D model structure.

Poststack estimation of three‐dimensional crossline statics

Geophysics ◽  
1984 ◽  
Vol 49 (3) ◽  
pp. 227-236 ◽  
Author(s):  
Philip S. Schultz ◽  
August Lau
Keyword(s):  
Data Acquisition ◽  
Wave Field ◽  
Correlation Time ◽  
Present Method ◽  
Three Dimensional ◽  
Geologic Structure ◽  
Wavenumber Domain ◽  
Spectral Components ◽  
Field Response ◽  
Additional Procedure

In three‐dimensional land data acquisition, the crossline dimension of the receiver spread is often much smaller than the inline dimension, typically for reasons of economy. Because of fundamental wavenumber limitations in the estimation of residual statics by prestack surface consistent methods, unresolved static errors will persist through processing to the stack data, particularly in the crossline direction. The present method involves an analysis of poststack 3-D data through the creation of a correlation time surface from crosscorrelations of adjacent stack data traces. This time surface is decomposed in the wavenumber domain to isolate and correct some of the spectral components of residual static errors which are beyond the resolution of prestack approaches. Assumptions are implicit within the method regarding the expected 2-D wavenumber nature of the wave field response of true geologic structure. The method is proposed as an additional procedure to the standard 3-D processing sequence for land data.

scholarly journals Geological interpretation of the northern flank of the Matagami camp, Quebec, using gravity and magnetic inversions

2019 ◽  
Vol 56 (5) ◽  
pp. 471-482 ◽  
Author(s):  
Thibaut Astic ◽  
Michel Chouteau
Keyword(s):  
Gravity Data ◽  
Volcanic Rocks ◽  
Three Dimensional ◽  
Gravity Models ◽  
Earth Model ◽  
Surface Geometry ◽  
Northern Flank ◽  
Geological Interpretation ◽  
Geophysical Model ◽  
Gravity And Magnetic

The northern flank of the Galine anticline of the Matagami camp has been well known for decades for hosting polymetallic VMS deposits (mostly copper and zinc). In such an already explored area, sophisticated exploration tools must be used in the hope of generating new information. By integrating geophysical, petrophysical, and geological data into a three-dimensional (3D) common earth model to constrain gravity and magnetic inversions, our objective was to validate and improve the geological interpretations of the area and to highlight geophysical anomalies unexplained in the current geological model. Both 3D magnetic and gravity data inversions confirm the surface geometry and the steep dip of the geological units. The inverted gravity models indicate that units observable at the surface of the northern flank extend subvertically to several kilometres in depth. The pyroxenitic phase of the Bell River Complex is most certainly dipping steeply to the south, contrary to some surface measurements. The Olga pluton shows no significant decrease in width at depth, with the exception of the west end, which appears to be an apophysis. A major unknown mass, which may correspond to a synvolcanic mafic intrusion that is not outcropping, is revealed in the Allard River volcanic rocks. This improved geophysical model featuring geometrical constraints obtained by careful processing and inversion of the potential-fields data could contribute to new exploration targets.

High‐resolution 3-D seismic survey over a coal mine reserve area in the U.S.—A case study

Geophysics ◽  
2000 ◽  
Vol 65 (3) ◽  
pp. 712-718 ◽  
Author(s):  
Lawrence M. Gochioco
Keyword(s):  
High Resolution ◽  
Coal Mine ◽  
Seismic Data ◽  
Longwall Mining ◽  
Three Dimensional ◽  
Seismic Source ◽  
Seismic Survey ◽  
Geologic Structure ◽  
Reserve Area ◽  
Mine Development

A high‐resolution three‐dimensional (3-D) seismic survey was conducted in advance of coal mine development in the Illinois basin in May 1989 to better define a geologic structure with the potential to adversely affect longwall mining conditions. The 3-D seismic data indicate that an abrupt change in seam elevation, or roll, encountered near the northern property line trends south into the reserve area and then turns southeast. A personal computer‐based workstation was used to integrate borehole and seismic data for modeling in which 3-D block diagrams of the calculated seam elevations were generated. The block diagrams show a steep slope on the west flank of the roll that gradually decreases as the roll turns to the southeast. The survey also reveals a geologic structure beneath the roll at an estimated depth of 46–62 m. Horizontal time‐slice sections of this feature suggest the presence of a paleochannel that meanders on a similar course as the roll, which apparently was connected to a larger paleochannel system. A Conoco high‐frequency vibroseis unit was successfully used as the seismic source to generate the high frequencies necessary to detect and resolve the thin coal beds.

Structural Interpretation of Changling Gas Field, Northeast China

2014 ◽  
Vol 962-965 ◽  
pp. 618-621
Author(s):  
Xiao Yu Yu ◽  
Yong Yuan ◽  
Jin Liang Zhang ◽  
Yuan Yuan Wang ◽  
Xin Lv
Keyword(s):  
High Precision ◽  
Frequency Analysis ◽  
Northeast China ◽  
Three Dimensional ◽  
Velocity Model ◽  
Synthetic Seismogram ◽  
Gas Field ◽  
Time Frequency ◽  
Fracture Structure ◽  
Fault Distribution

Use techniques of coherence body, dip body, azimuth body, variance body and ants body to implement the fracture structure in the study area and study the fault distribution. Fine make logging synthetic seismogram in the study area, compare multi-well jointly, use the time-frequency analysis technology combined with core and logging data to track to explain the target layers.Make the velocity model and give the structure diagram of target layers by time-depth conversionon the basis of full three-dimensional interpretation and high-precision synthetic seismogram.

scholarly journals SUBSURFACE STRUCTURE OF BATURAGUNG ESCARPMENT REVEALED THROUGH THREE-DIMENSIONAL GRAVITY INVERSION

2021 ◽  
Vol 7 (1) ◽  
pp. 17-29
Author(s):  
Selvi Misnia Irawati ◽  
Alutsyah Luthfian ◽  
Agus Laesanpura
Keyword(s):  
Regional Scale ◽  
Three Dimensional ◽  
Gravity Inversion ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Maximum Width ◽  
Geophysical Model ◽  
Extensional Tectonic ◽  
Tectonic Element ◽  
Dimensional Gravity

Baturagung Escarpment is an essential tectonic element of Java Island because it represents a transition from the Southern Mountain Block to the Kendeng Basin. This study has succeeded in producing a three-dimensional model of the Baturagung Escarpment subsurface using gravity anomaly data. The data are distributed along a regional scale transect, whose resolving capability has been tested using a checkerboard test. Our proposed geophysical model can fit the observed data very well, with a 0.77% RMS error. This model exhibits a structural depression bounded by high basement blocks below the Baturagung Escarpment, one of the basement block outcrops at Jiwo Hills. The maximum width of the depression is 10 km, with a depth exceeding 3 km in some places. The depression might be formed because of an extensional tectonic regime that prevailed during the Palaeogene, followed by volcanic arc loads' emplacement up to the early Miocene.

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