Results 21 to 30 of about 115 (95)

Identification of Gas Accumulation Adjacent to the Gas Hydrate Bearing Zone by Inversion Utilizing AVO Attribute [PDF]

Journal of Petroleum Science and Technology, 2018
The presence of gas hydrate and associated gas in the Makran Accretionary Prism, offshore Iran, has been confirmed by various seismic indicators, including the bottom-simulating reflector (BSR), amplitude blanking, and bright spot. The pre-stack analysis
Effat Behboudi, Nasser Keshavarz, Asghar Naderi   +2 more
doaj   +1 more source

New Constraints for the On‐Shore Makran Subduction Zone Crustal Structure

Journal of Geophysical Research: Solid Earth, Volume 127, Issue 1, January 2022., 2022
Abstract The Makran Subduction Zone is the primary seismic/tsunami hazard of the northwestern Indian Ocean, but little is known of its on‐shore seismic structure. We derived a shear wave velocity model extending to 100 km depth beneath a ∼400 km‐long seismic profile oriented parallel to the convergence vector of the Arabian Sea Plate. Receiver function/
Keith Priestley, Farhad Sobouti, Rahil Mokhtarzadeh, Mohsen A. Irandoust, Reza Ghods, Khalil Motaghi, Tak Ho   +6 more
wiley   +1 more source

Interaction between hydrocarbon seepage, chemosynthetic communities, and bottom water redox at cold seeps of the Makran accretionary prism: insights from habitat-specific pore water sampling and modeling [PDF]

Biogeosciences, 2012
The interaction between fluid seepage, bottom water redox, and chemosynthetic communities was studied at cold seeps across one of the world's largest oxygen minimum zones (OMZ) located at the Makran convergent continental margin. Push cores were obtained
D. Fischer, H. Sahling, K. Nöthen, G. Bohrmann, M. Zabel, S. Kasten   +5 more
doaj   +1 more source

Evolution of the Thermal and Dehydration State of Sediments Entering the North Sumatra Subduction Zone

Geochemistry, Geophysics, Geosystems, Volume 22, Issue 4, April 2021., 2021
Abstract Shallow slip on the plate‐boundary fault during the 2004 Mw 9.2 Aceh‐Andaman Earthquake, offshore North Sumatra, has been linked to thick incoming sediments on the oceanic plate with advanced diagenetic and sediment property changes at the depths of plate boundary fault development.
Duncan E. Stevens, Timothy J. Henstock, Lisa C. McNeill   +2 more
wiley   +1 more source

Crustal Structure of the UAE‐Oman Mountain Range and Arabian Rifted Passive Margin: New Constraints From Active and Passive Seismic Methods

Journal of Geophysical Research: Solid Earth, Volume 126, Issue 4, April 2021., 2021
Abstract The Semail ophiolite, a thick thrust sheet of Late Cretaceous oceanic crust and upper mantle, was obducted onto the previously rifted Arabian continental margin in the Late Cretaceous, and now forms part of the United Arab Emirates (UAE)‐Oman mountain belt.
S. Pilia, M. Y. Ali, M. P. Searle, A. B. Watts, C. Lü, D. A. Thompson   +5 more
wiley   +1 more source

Crustal Deformation and Fault Strength of the Sulawesi Subduction Zone

Tectonics, Volume 40, Issue 3, March 2021., 2021
Abstract This paper investigates the seismicity and rheology of the North‐Sulawesi subduction zone. Body‐wave modeling is used to estimate focal mechanisms and centroid depths of moderate magnitude (M5–M6.5) earthquakes on the North Sulawesi megathrust and surrounding region.
T. Greenfield, A. C. Copley, C. Caplan, P. Supendi, S. Widiyantoro, N. Rawlinson   +5 more
wiley   +1 more source

Tectonics of the Papua‐Woodlark Region

Geochemistry, Geophysics, Geosystems, Volume 22, Issue 1, January 2021., 2021
Abstract The Papua‐Woodlark region exemplifies many plate tectonic processes, from active continental breakup to double plunging subduction zones. We present a synthesis of geological and geophysical data from the region and interpret these data to characterize the present plate boundaries.
Elizabeth K. Benyshek, Brian Taylor
wiley   +1 more source

A review of the seismotectonics of the Makran Subduction Zone as a baseline for Tsunami Hazard Assessments

Geoscience Letters, 2019
The Makran Accretionary Wedge (900 km across) is a consequence of northward subduction of the oceanic part of the Arabian Plate beneath the Lut and Afghan blocks in the northwestern Indian Ocean.
Mohammad Mokhtari, Ahmad Ala Amjadi, Leila Mahshadnia, Mandana Rafizadeh   +3 more
doaj   +1 more source

Assessment of gas-hydrate saturations in the Makran accretionary prism using the offset dependence of seismic amplitudes [PDF]

Geophysics, 2010
Abstract We estimate the saturations of gas hydrate and free gas based on measurements of seismic-reflection amplitude variation with offset (AVO) for a bottom-simulating reflector coupled with rock-physics modeling. When we apply the approach to data from a seismic line in the Makran accretionary prism in the Arabian Sea, the results
Ohja, Mahresawr, Sain, Kalachand, Minshull, Timothy A.   +2 more
openaire   +2 more sources

Modeling of contribution of the Late Cretaceous-Miocene sediments of the Makran accretionary wedge to the petrogenesis of basalts from Makran volcanic arc, SE Iran [PDF]

پترولوژی
Introduction Makran geological province of SE Iran is an east-west trending mountain range related to the Cretaceous-to-recent subduction of the Indian oceanic lithosphere beneath the southeastern edge of the Eurasian plate (McCall, 1997; Saccani et al.,
Ali Ahmadi, Mostafa Ghomashi, Zahra Firouzkouhi, Marzie Rastay zahedan   +3 more
doaj   +1 more source