Research papers
2020 · Cambridge University Press eBooks · 1,711 citations
Responding to the latest developments in rock physics research, this popular reference book has been thoroughly updated while retaining its comprehensive coverage of the fundamental theory, concepts, and laboratory results. It brings together the vast literature from the field to address the relationships between geophysical observations and the underlying physical properties of Earth materials - including water, hydrocarbons, gases, minerals, rocks, ice, magma and methane hydrates. This third edition includes expanded coverage of topics such as effective medium models, viscoelasticity, attenuation, anisotropy, electrical-elastic cross relations, and highlights applications in unconventional reservoirs. Appendices have been enhanced with new materials and properties, while worked examples (supplemented by online datasets and MATLAB® codes) enable readers to implement the workflows and models in practice. This significantly revised edition will continue to be the go-to reference for students and researchers interested in rock physics, near-surface geophysics, seismology, and professionals in the oil and gas industries.
2002 · Geology · 63 citations
Research Article| October 01, 2002 Pronounced central uplift identified in the Bosumtwi impact structure, Ghana, using multichannel seismic reflection data Christopher A. Scholz; Christopher A. Scholz 1204 Heroy Geology Laboratory, Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Search for other works by this author on: GSW Google Scholar Tobias Karp; Tobias Karp 2Institut für Geowissenschaften, Abteilung Geophysik Otto-Hahn-Platz 1, 24118 Kiel, Germany Search for other works by this author on: GSW Google Scholar Keely M. Brooks; Keely M. Brooks 3204 Heroy Geology Laboratory, Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Search for other works by this author on: GSW Google Scholar Bernd Milkereit; Bernd Milkereit 4Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada Search for other works by this author on: GSW Google Scholar Philip Y.O. Amoako; Philip Y.O. Amoako 5Ghana Geological Survey, P.O. Box M80, Accra, Ghana Search for other works by this author on: GSW Google Scholar Justice A. Arko Justice A. Arko 6Institute of Mining and Mineral Engineering, University of Science and Technology, Kumasi, Ghana Search for other works by this author on: GSW Google Scholar Author and Article Information Christopher A. Scholz 1204 Heroy Geology Laboratory, Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Tobias Karp 2Institut für Geowissenschaften, Abteilung Geophysik Otto-Hahn-Platz 1, 24118 Kiel, Germany Keely M. Brooks 3204 Heroy Geology Laboratory, Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Bernd Milkereit 4Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada Philip Y.O. Amoako 5Ghana Geological Survey, P.O. Box M80, Accra, Ghana Justice A. Arko 6Institute of Mining and Mineral Engineering, University of Science and Technology, Kumasi, Ghana Publisher: Geological Society of America Received: 22 Jan 2002 Revision Received: 13 Jun 2002 Accepted: 18 Jun 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (10): 939–942. https://doi.org/10.1130/0091-7613(2002)030<0939:PCUIIT>2.0.CO;2 Article history Received: 22 Jan 2002 Revision Received: 13 Jun 2002 Accepted: 18 Jun 2002 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Christopher A. Scholz, Tobias Karp, Keely M. Brooks, Bernd Milkereit, Philip Y.O. Amoako, Justice A. Arko; Pronounced central uplift identified in the Bosumtwi impact structure, Ghana, using multichannel seismic reflection data. Geology 2002;; 30 (10): 939–942. doi: https://doi.org/10.1130/0091-7613(2002)030<0939:PCUIIT>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Lake Bosumtwi impact structure is the youngest and best-preserved complex terrestrial impact crater and serves as an important reference site for the study of cratering processes. Because the impacting body struck continental crystalline target rocks and not a submerged sedimentary platform, no significant backwash processes have modified the crater morphology. Not only may Bosumtwi contain the best-preserved central uplift structure on Earth, but it is the most accessible relatively large, young crater in the solar system generated in a large gravity field. There is a well-established link between the Lake Bosumtwi impact structure and the Ivory Coast tektite field, and the lacustrine sediments within the crater contain a unique 1 m.y. record of paleoclimate in the continental tropics south of the Sahel. Eight profiles of marine-type multichannel seismic reflection (MCS) data were acquired from the 8-km-diameter, ∼75-m-deep lake that fills much of the crater. These were augmented by wide-angle seismic data acquired with ocean-bottom hydrophones. MCS data reveal a well-defined central uplift near the northwest-central part of the lake and a maximum postimpact lacustrine sediment thickness of ∼310 m. The central uplift structure has a diameter of 1.9 km and a maximum height of 130 m above the annular moat inside the crater. An intermediate velocity layer (3200 m/s) beneath the lacustrine sediment is interpreted as fallback breccia or a breccia-melt horizon. The measured apparent depth of the crater (da) is 500 m, implying a slightly higher aspect ratio for the structure than predicted from published empirical relationships. The Bosumtwi structure is a small complex crater that deviates slightly from trends predicted from classical scaling laws, perhaps because of the effects of a large gravity field. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
2009 · South African Journal of Geology · 18 citations
Research Article| December 01, 2009 DETERMINISTIC SEISMIC GROUND MOTION MODELLING OF THE GREATER ACCRA METROPOLITAN AREA, SOUTHEASTERN GHANA P.E. AMPONSAH; P.E. AMPONSAH Geological Survey Department, Accra, Ghana, e-mail: pekua2@yahoo.com Search for other works by this author on: GSW Google Scholar B.K. BANOENG-YAKUBO; B.K. BANOENG-YAKUBO Geology Department, University of Ghana, Legon, Ghana, e-mail: bbruce@ug.edu.gh Search for other works by this author on: GSW Google Scholar G.F. PANZA; G.F. PANZA Department of Earth Sciences, University of Trieste, Italy, The Abdus Salam International Centre for Theoretical Physics- ESP SAND group, Trieste, Italy, e-mail: panza@dst.units.it Search for other works by this author on: GSW Google Scholar F. VACCARI F. VACCARI Department of Earth Sciences, University of Trieste, Italy, e-mail: vaccari@dst.units.it Search for other works by this author on: GSW Google Scholar Author and Article Information P.E. AMPONSAH Geological Survey Department, Accra, Ghana, e-mail: pekua2@yahoo.com B.K. BANOENG-YAKUBO Geology Department, University of Ghana, Legon, Ghana, e-mail: bbruce@ug.edu.gh G.F. PANZA Department of Earth Sciences, University of Trieste, Italy, The Abdus Salam International Centre for Theoretical Physics- ESP SAND group, Trieste, Italy, e-mail: panza@dst.units.it F. VACCARI Department of Earth Sciences, University of Trieste, Italy, e-mail: vaccari@dst.units.it Publisher: Geological Society of South Africa First Online: 09 Mar 2017 Online ISSN: 1996-8590 Print ISSN: 1012-0750 © 2009 Geological Society of South Africa South African Journal of Geology (2009) 112 (3-4): 317–328. https://doi.org/10.2113/gssajg.112.3-4.317 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation P.E. AMPONSAH, B.K. BANOENG-YAKUBO, G.F. PANZA, F. VACCARI; DETERMINISTIC SEISMIC GROUND MOTION MODELLING OF THE GREATER ACCRA METROPOLITAN AREA, SOUTHEASTERN GHANA. South African Journal of Geology 2009;; 112 (3-4): 317–328. doi: https://doi.org/10.2113/gssajg.112.3-4.317 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySouth African Journal of Geology Search Advanced Search Abstract The seismic ground motion of the greater Accra Metropolitan Area has been modelled for land use planning and disaster mitigation. The deterministic computation, a hybrid method based on the modal summation and finite difference method was used. Using these techniques, the seismic ground motion along four profiles located in the metropolis has been computed. The 1939 earthquake of magnitude 6.5 (ML ) was used as the scenario earthquake. Synthetic seismic waveforms from which parameters for engineering design such as peak ground acceleration, velocity and spectral amplifications have been produced along the geological cross sections. The peak ground acceleration and velocity computed for the metropolis ranges from 0.14 g to 0.57 g and 9.2 cms−1 to 37.1 cms−1, respectively. These correspond to intensity ranging from VII to IX on the Modified Mercalli Intensity scale. Areas in the metropolis underlain by unconsolidated sediments experience the largest shakings. The results illustrated represent a useful guide for civil engineers in the design of buildings in the metropolis for safe and sustainable development. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.