Seismic Facies and Geologic Evolution of the Central Portion of the Indus Fan

1991 ◽  
pp. 383-402 ◽  
Author(s):  
L. Droz ◽  
G. Bellaiche
Keyword(s):  
Seismic Facies ◽  
Central Portion

Genshin's Ojōyōshū and the Construction of Pure Land Discourse in Heian Japan

2017 ◽  
Author(s):  
Robert F. Rhodes
Keyword(s):  
Historical Background ◽  
Pivotal Role ◽  
Central Portion ◽  
Substantial Portion ◽  
Pure Land ◽  
Systematic Analysis ◽  
Heian Period ◽  
Pure Land Buddhism ◽  
Time Part ◽  
India And China

The Ōjōyōshū, written by the Heian period Tendai monk Genshin (942-1017), played a pivotal role in establishing Pure Land Buddhism in Japan. This book is a study of the central teachings of the Ōjōyōshū. Furthermore, in order to situate this text in its historical background, a substantial portion of the volume is taken up with discussions of the development of Pure Land Buddhism before Genshin’s time and to Genshin’s event-filled life. Part One provides a brief survey of Pure Land Buddhism in India and China and then treats how it developed in Japan before Genshin’s time. Part Two focuses on the main events of Genshin’s life. Part Three turns to two main issues taken up in the Ōjōyōshū: its Pure Land cosmology and its nenbutsu teaching. In his description of the Pure Land cosmology, Genshin describes, in often graphic detail, the suffering inherent in the six realms of transmigration, including hell, and urges his readers to seek birth in Amida Buddha’s Pure Land, a realm beyond suffering. Furthermore, in the central portion of the Ōjōyōshū, Genshin presents a systematic analysis of the nenbutsu, or the practice of focusing one’s mind on Amida, which is the central practice for attaining birth in the Pure Land.

scholarly journals Geomorphological Geometries and High-Resolution Seismic Sequence Stratigraphy of Malay Basin’s Fluvial Succession

2021 ◽  
Vol 11 (11) ◽  
pp. 5156
Author(s):  
Abd Al-Salam Al-Masgari ◽  
Mohamed Elsaadany ◽  
Numair A. Siddiqui ◽  
Abdul Halim Abdul Latiff ◽  
Azli Abu Bakar ◽  
...  
Keyword(s):  
High Resolution ◽  
Sequence Stratigraphy ◽  
Three Dimensional ◽  
Seismic Attributes ◽  
Seismic Facies ◽  
Seismic Sequence ◽  
3D Seismic ◽  
Seismic Sequences ◽  
Seismic Sequence Stratigraphy ◽  
Point Bars

This study identified the Pleistocene depositional succession of the group (A) (marine, estuarine, and fluvial depositional systems) of the Melor and Inas fields in the central Malay Basin from the seafloor to approximately −507 ms (522 m). During the last few years, hydrocarbon exploration in Malay Basin has moved to focus on stratigraphic traps, specifically those that existed with channel sands. These traps motivate carrying out this research to image and locate these kinds of traps. It can be difficult to determine if closely spaced-out channels and channel belts exist within several seismic sequences in map-view with proper seismic sequence geomorphic elements and stratigraphic surfaces seismic cross lines, or probably reinforce the auto-cyclic aggregational stacking of the avulsing rivers precisely. This analysis overcomes this challenge by combining well-log with three-dimensional (3D) seismic data to resolve the deposition stratigraphic discontinuities’ considerable resolution. Three-dimensional (3D) seismic volume and high-resolution two-dimensional (2D) seismic sections with several wells were utilized. A high-resolution seismic sequence stratigraphy framework of three main seismic sequences (3rd order), four Parasequences sets (4th order), and seven Parasequences (5th order) have been established. The time slice images at consecutive two-way times display single meandering channels ranging in width from 170 to 900 m. Moreover, other geomorphological elements have been perfectly imaged, elements such as interfluves, incised valleys, chute cutoff, point bars, and extinction surfaces, providing proof of rapid growth and transformation of deposits. The high-resolution 2D sections with Cosine of Phase seismic attributes have facilitated identifying the reflection terminations against the stratigraphic amplitude. Several continuous and discontinuous channels, fluvial point bars, and marine sediments through the sequence stratigraphic framework have been addressed. The whole series reveals that almost all fluvial systems lay in the valleys at each depositional sequence’s bottom bars. The degradational stacking patterns are characterized by the fluvial channels with no evidence of fluvial aggradation. Moreover, the aggradation stage is restricted to marine sedimentation incursions. The 3D description of these deposits permits distinguishing seismic facies of the abandoned mud channel and the sand point bar deposits. The continuous meandering channel, which is filled by muddy deposits, may function as horizontal muddy barriers or baffles that might isolate the reservoir body into separate storage containers. The 3rd, 4th, and 5th orders of the seismic sequences were established for the studied succession. The essential geomorphological elements have been imaged utilizing several seismic attributes.

Compact structure of the central portion of factor H

2009 ◽  
Vol 46 (14) ◽  
pp. 2866-2867
Author(s):  
Christoph Q. Schmidt ◽  
Andrew P. Herbert ◽  
Elisavet Makou ◽  
Ilias Matis ◽  
Haydyn D. Mertens ◽  
...  
Keyword(s):  
Factor H ◽  
Central Portion ◽  
Compact Structure

Quaternary seismic facies of the atlantic continental rise

2012 ◽  
Vol 47 (5) ◽  
pp. 379-400 ◽  
Author(s):  
I. O. Murdmaa ◽  
O. V. Levchenko ◽  
J. G. Marinova
Keyword(s):  
Seismic Facies ◽  
Continental Rise

scholarly journals III. The influence of stress and strain on the physical properties of matter. Part III. Magnetic induction

1887 ◽  
Vol 42 (251-257) ◽  
pp. 224-230 ◽  
Keyword(s):  
Physical Properties ◽  
Magnetic Induction ◽  
Central Portion ◽  
Secondary Coil ◽  
Stress And Strain ◽  
Iron Nickel ◽  
Considerable Length ◽  
The Wire ◽  
Effects Of Stress

The author lays before the Society the results of experiments extending over a period of ten years on the effects of stress and strain on the magnetic permeabilities of iron, nickel, and cobalt. Two methods were employed. In one the metal to be tested—usually in the form of wire—was placed with its axis coincident with that of a magnetising solenoid, in most cases of considerable length as compared with the diameter of the wire; round the central portion of the solenoid was wrapped a secondary coil .

Latest developments in seismic texture analysis for subsurface structure, facies, and reservoir characterization: A review

Geophysics ◽  
2011 ◽  
Vol 76 (2) ◽  
pp. W1-W13 ◽  
Author(s):  
Dengliang Gao
Keyword(s):  
Texture Analysis ◽  
Reservoir Characterization ◽  
Preliminary Test ◽  
Seismic Facies ◽  
Least Squares Regression ◽  
Reservoir Properties ◽  
Seismic Amplitude ◽  
Texture Model ◽  
Facies Classification ◽  
Analysis Window

In exploration geology and geophysics, seismic texture is still a developing concept that has not been sufficiently known, although quite a number of different algorithms have been published in the literature. This paper provides a review of the seismic texture concepts and methodologies, focusing on latest developments in seismic amplitude texture analysis, with particular reference to the gray level co-occurrence matrix (GLCM) and the texture model regression (TMR) methods. The GLCM method evaluates spatial arrangements of amplitude samples within an analysis window using a matrix (a two-dimensional histogram) of amplitude co-occurrence. The matrix is then transformed into a suite of texture attributes, such as homogeneity, contrast, and randomness, which provide the basis for seismic facies classification. The TMR method uses a texture model as reference to discriminate among seismic features based on a linear, least-squares regression analysis between the model and the data within an analysis window. By implementing customized texture model schemes, the TMR algorithm has the flexibility to characterize subsurface geology for different purposes. A texture model with a constant phase is effective at enhancing the visibility of seismic structural fabrics, a texture model with a variable phase is helpful for visualizing seismic facies, and a texture model with variable amplitude, frequency, and size is instrumental in calibrating seismic to reservoir properties. Preliminary test case studies in the very recent past have indicated that the latest developments in seismic texture analysis have added to the existing amplitude interpretation theories and methodologies. These and future developments in seismic texture theory and methodologies will hopefully lead to a better understanding of the geologic implications of the seismic texture concept and to an improved geologic interpretation of reflection seismic amplitude.

Marriage and the Girl's Puberty Ceremony of the G/wi Bushmen

Africa ◽  
1963 ◽  
Vol 33 (1) ◽  
pp. 12-24 ◽  
Author(s):  
G. B. Silberbauer
Keyword(s):  
Field Trip ◽  
Central Portion ◽  
Game Reserve ◽  
Opening Paragraph

Opening ParagraphThe G/wi Bushmen referred to in this article live in the Central Kalahari Game Reserve in the Bechuanaland Protectorate. Although the census of the Reserve is not yet complete, its permanent Bushman population is estimated as being 3,000, plus another 2,000 summer migrants. The Reserve is 20,115 square miles in extent and its Bushman inhabitants enjoy exclusive hunting rights, unrestricted except for a prohibition on the use of firearms and certain types of steel traps. The puberty ceremony described here was performed in the central portion of the Reserve. Although I have not had the fortune of a field-trip coinciding with another ceremony I had previously been told by members of three bands what would happen. This agreed in detail with what I saw. Later descriptions from all five bands of the vicinity do not differ, so this version is presumably representative of the ‘wild’ G/wi of the region. These Bushmen have had almost no contact with Europeans other than the personnel of the Bechuanaland Government Bushman Survey.

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