Cretaceous intraplate volcanism of Govorov Guyot and formation models of the Magellan seamounts, Pacific Ocean

@article{Peretyazhko2022CretaceousIV,  title={Cretaceous intraplate volcanism of Govorov Guyot and formation models of the Magellan seamounts, Pacific Ocean},  author={Igor S. Peretyazhko and Elena A. Savina},  journal={International Geology Review},  year={2022},  volume={65},  pages={2479 - 2505},  url={https://api.semanticscholar.org/CorpusID:254011792}}
ABSTRACT The OIB-type volcanic rocks of Govorov Guyot in Magellan Seamounts (Pacific Ocean) include basalts, trachybasalts, basaltic trachyandesites, and trachyandesites dated by the 40Ar-39Ar plateau from 121 ± 2.8 to 98.5 ± 1.4 Ma. Some rocks bear amphibole-spinel wehrlite xenoliths and clinopyroxene-amphibole (Cpx-Amp) mantle vein fragments in xenoliths and xenocrysts, which are remnants of metasomatized oceanic lithosphere. The pressure and temperature crystallization for pargasitic… 
6 Citations

6 Citations

Miocene Petit-Spot Basanitic Volcanoes on Cretaceous Alba Guyot (Magellan Seamount Trail, Pacific Ocean)

New data obtained from core samples of two boreholes and dredged samples in the Alba Guyot in the Magellan Seamount Trail (MST), Western Pacific, including the 40Ar/39Ar age of basanite, mineralogy…

Geochronological and geochemical constraints on the petrogenesis and geodynamic process of Hemler, Vlinder, and Il’ichev seamount lavas in NW Pacific

Oceanic intraplate volcanoes with linear age progressions are usually accepted to be derived from melting of an upwelling mantle plume. Several seamount groups in NW Pacific, however, show complex…

Cobalt-Rich Fe-Mn Crusts in the Western Pacific Magellan Seamount Trail: Geochemistry and Chronostratigraphy

Synthesis of published and new data from the Govorov and Kocebu guyots provide geochemical and chronostratigraphic constraints on hydrogenetic cobalt-rich Fe-Mn crusts from the Western Pacific…

Volcanic Complexes and Tectonomagmatic Stages in the Evolution of Magellan Seamount Guyots (Pacific Ocean). Message 2: Tectonomagmatic Stages

There are five tectonomagmatic stages in the evolution of Magellan Seamount guyots: 1, Late Jurassic–Early Cretaceous (Earliest Cretaceous, ∼160–140 (?) Ma); 2, Early Cretaceous (Late Barremian…

85 References

Intraplate Volcanism of the Alba Guyot: Geodynamic Formation Models of the Magellan Seamounts in the Pacific Ocean for 100 million years

-We report data on 9 samples of basaltic rocks and a spinel lherzolite xenolith collected during dredging in the area of Alba Guyot (Magellan Seamounts, Pacific Ocean). The data include 40Ar–39Ar…

Melt depletion and subsequent metasomatism in the shallow mantle beneath Koolau volcano, Oahu (Hawaii)

Xenoliths from Pali (Oahu, Hawaii) include samples of the mantle lithosphere underlying Koolau shield volcano. Most such xenoliths are spinel peridotites, the remainder being plagioclase‐spinel…

The Magellan seamounts: Early Cretaceous record of the South Pacific isotopic and thermal anomaly

We present geophysical, geochemical, and geochronological data from two Early Cretaceous seamounts in the westem Pacific Ocean which formed at melt sources in what is now French Polynesia. One…

Origin of xenoliths in the trachyte at Puu Waawaa, Hualalai Volcano, Hawaii

Rare dunite and 2-pyroxene gabbro xenoliths occur in banded trachyte at Puu Waawaa on Hualalai Volcano, Hawaii. Mineral compositions suggest that these xenoliths formed as cumulates of tholeiitic…

Wehrlites from continental mantle monitor the passage and degassing of carbonated melts

doi: 10.7185/geochemlet.2031 Continental rifting has been linked to the thinning and destruction of cratonic lithosphere and to the release of enough CO2 to impact the global climate. This…

Metasomatism and Hydration of the Oceanic Lithosphere: a Case Study of Peridotite Xenoliths from Samoa

Water influences geodynamic processes such as melting, deformation and rheology, yet its distribution in the oceanic upper mantle is primarily known indirectly from melt inclusions and glasses of…

Hawaiian mantle xenoliths and magmas: Composition and thermal character of the lithosphere

Abstract Recent seismological investigations into the Hawaiian mantle and geophysical studies of the Hawaiian Swell have led to divergent models regarding the thermal structure and role of the…
...

Related Papers

Showing 1 through 3 of 0 Related Papers