Results 61 to 70 of about 746 (208)

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato, Luiz F. De Ros, Howri Mansurbeg   +2 more
wiley   +1 more source

Uneven submarine topography south of Mernoo Gap—the result of volcanism and submarine sliding [PDF]

New Zealand Journal of Geology and Geophysics, 1975
Abstract Irregular submarine topography and isolated shallow soundings in an area between 44° 34' S and 45° S latitude and 174° 12' E and 175° E longitude south of Mernoo Gap are found to be associated with numerous, small, relatively young, volcanoes in a terrain of large submarine slides.
openaire   +1 more source

Volcanic facies and hydrothermal processes in Triassic pillow basalts from the Darnó Unit, NE Hungary

Geologia Croatica, 2008
The Darnó Unit within the Zagorje-Mid-Transdanubian Megaunit is an allochtonous part of Dinarides in NE-Hungary and represents a relict of the Neotethyan accretionary complex.
Gabriella Kiss, Ferenc Molnar, Ladislav A. Palinkaš   +2 more
doaj   +1 more source

Water on Mars: Do submarine cyclic steps exist on the red planet?

Progress in Earth and Planetary Science, 2018
Submarine cyclic steps have a significant impact on the evolution of the ocean floor on Earth. These upper-flow regime bedforms should be even more common in Martian reduced-gravity environments.
Svetlana Kostic, Isaac B. Smith
doaj   +1 more source

Hydrothermal Activity and Seismicity at Teahitia Seamount: Reactivation of the Society Islands Hotspot?

Frontiers in Marine Science, 2020
Along mid-ocean ridges, submarine venting has been found at all spreading rates and in every ocean basin. By contrast, intraplate hydrothermal activity has only been reported from five locations, worldwide.
Christopher R. German, Joseph A. Resing, Joseph A. Resing, Guangyu Xu, Isobel A. Yeo, Sharon L. Walker, Colin W. Devey, James W. Moffett, Gregory A. Cutter, Olivier Hyvernaud, Dominique Reymond   +10 more
doaj   +1 more source

Brief and intensive volcanic emissions from Ontong Java Nui heralded Oceanic Anoxic Event 1a

Communications Earth & Environment
The volcanic episode that formed Ontong Java Nui (OJN) in the western Pacific ~ 120 million-year-ago is thought to have triggered Oceanic Anoxic Event (OAE) 1a, yet the cause-effect relationship remains insufficiently understood. Here, we present a Pb-Os-
Hironao Matsumoto, Kosuke T. Goto, Gen Shimoda, Yasuto Watanabe, Kotaro Shirai, Maria Luisa G. Tejada, Akira Ishikawa, Atsushi Ando, Takashi Sano, Junichiro Kuroda, Katsuhiko Suzuki   +10 more
doaj   +1 more source

Geomorphology and Age Constraints of Seamounts in the Cabo Verde Archipelago, and Their Relationship to Island Ages and Geodynamic Evolution

Geochemistry, Geophysics, Geosystems
The Cabo Verde Archipelago is related to a mantle plume located close to the rotational pole of the African Plate. It consists of islands and seamounts arranged in a horseshoe‐shaped pattern open to the west, thus forming two volcanic chains, each with a
Tom Kwasnitschka, Thor H. Hansteen, Ricardo S. Ramalho, Colin W. Devey, Andreas Klügel, Lisa K. Samrock, Jo‐Anne Wartho   +6 more
doaj   +1 more source

Geochemistry of upper Permian siliceous rocks from the Lower Yangtze region, southeastern China: implications for the origin of chert and Permian ocean chemistry

Petroleum Science, 2018
The Permian Chert Event is of great significance to understanding the geological evolution of the entire Permian; however, the origin of widespread chert formation is debated.
Zhi-Wei Liao, Wen-Xuan Hu, Xiu-Gen Fu, Zhong-Ya Hu   +3 more
doaj   +1 more source

Geophysical and geochemical constraints on submarine volcanic processes [PDF]

, 2019
Submarine volcanic systems form new oceanic crust, host unique chemosynthetic ecosystems, concentrate rare metals, and provide a conduit for chemical transfer from the Earth's interior to hydrosphere. Although our understanding of submarine volcanoes has been historically limited due to their relative inaccessibility, recent observations from active ...
openaire   +4 more sources