Results 31 to 40 of about 1,105,251 (141)

Geological and geophysical survey in the Bellingshausen Basin, off Antarctica

open access: yesAntarctic Record, 1982
The continental margin in the Bellingshausen Basin off West Antarctica was geologically and geophysically surveyed. The paleo-trench, which has been inferred from the seafloor magnetic anomalies, is found out in the 3-fold seismic reflection profiles. In
Katsuhiro Kimura
doaj   +1 more source

Geological properties of Güney formation (Ereğli - Ulukışla Basin, Niğde)

open access: yesBulletin of the Mineral Research and Exploration, 2021
The aim of this study to determine stratigraphic, sedimentological and petrographic characteristics of the Upper Paleocene - Lower Eocene Güney formation in the Ereğli - Ulukışla Basin based on the lithological and environmental interpretations related ...
Nurettin Sonel, Ayfer Özdemir
doaj   +1 more source

The Araxá Group in the South-Southwest Region of the Goiás State [PDF]

open access: yesGeologia USP. Série Científica, 2013
In the S – SW region of Goiás State, Brazil, the Araxá Group is constituted of a metasedimentary sequence containing schistoseand gneissic (garnet-biotite-quartz schists, feldspatic garnet-biotite-quartz schists, garnet-biotite-quartz paragneisses,with ...
Guillermo Rafael Beltran Navarro   +2 more
doaj   +1 more source

Tectonic setting for Tsunemori Formation in the Permian accretionary complex of the Akiyoshi Belt, Southwest Japan

open access: yesHeliyon, 2018
The purpose of this study is to reexamine the age, depositional environment, and tectonic setting of the Tsunemori Formation. This study provides a new tectonic model on the formation of Tsunemori Formation, which is a key formation to understand the ...
Koji Wakita, Ruri Yoshida, Yuki Fushimi
doaj   +1 more source

Seismic Velocity Structure Beneath the Tofino Forearc Basin Using Full Waveform Inversion

open access: yesEnergies, 2021
Given the effects of steep dips and large lateral variations in seismic velocity beneath the Vancouver Island continental shelf, seismic processing and travel time inversion are inadequate to obtain a detailed velocity model of the subsurface. Therefore,
Subbarao Yelisetti, George D. Spence
doaj   +1 more source

Origin and evolution of Neoproterozoic metaophiolitic mantle rocks from the eastern Desert of Egypt: Implications for tectonic and metamorphic events in the Arabian-Nubian Shield

open access: yesGeologica Acta, 2023
The mantle rocks from Kadaboura and Madara areas represent sections of dismembered ophiolitic complexes developed during the Neoproterozoic in the Eastern Desert of Egypt, which is located in the northwestern corner of the Arabian–Nubian Shield.
Shehata Ali   +2 more
doaj   +1 more source

Out‐of‐sequence thrusting in experimental Coulomb wedges: Implications for the structural development of mega‐splay faults and forearc basins

open access: yesGeophysical Research Letters, 2012
We have investigated how an arc‐ward increase in bulk mechanical strength in an experimental accretionary prism influences the development, timing, and duration of slip on out‐of‐sequence thrusts.
Saad S. B. Haq
doaj   +1 more source

An appraisal for the petroleum source rocks on oil seep and rock samples of the Tertiary Seblat and Lemau Formations, Bengkulu Basin

open access: yesIndonesian Journal on Geoscience, 2014
http://dx.doi.org/10.17014/ijog.vol4no1.20095The Tertiary Bengkulu Basin is known as a typical fore-arc basin, situated in southwest Sumatera. The basin initiated during Eocene-Oligocene times, accumulates the Lahat equivalent formation. The formation is
Hermes Panggabean, R. Heryanto
doaj   +1 more source

Replacement of Ores Recorded by Textures and Chemical Compositions of Sphalerite: An Example From the Furutobe Kuroko Deposit, Akita, Japan

open access: yesGeological Journal, EarlyView.
Coupled dissolution‐reprecipitation of early formed Cd‐, Fe‐, Ag‐ and Sb‐poor sphalerite through interaction with high‐temperature and high‐sulphur fugacity Cu‐rich fluids, responsible for the formation of the yellow ores, resulted in the formation of Cd‐, Fe‐, Ag‐ and Sb‐rich, heavily chalcopyrite‐diseased sphalerite and enrichment of critical metals ...
Manuel Nopeia   +4 more
wiley   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

open access: yesGeological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang   +6 more
wiley   +1 more source

Home - About - Disclaimer - Privacy