Results 131 to 140 of about 62,454 (271)

Archean eclogite-facies oceanic crust indicates modern-style plate tectonics. [PDF]

Proc Natl Acad Sci U S A, 2022
Ning W, Kusky T, Wang L, Huang B.
europepmc   +1 more source

Evolution Model for the Paleoproterozoic Talvivaara Mudstone‐Hosted Ni‐Zn‐Cu‐Co Deposit in Fennoscandia

Terra Nova, EarlyView.
ABSTRACT The Paleoproterozoic Talvivaara mudstone is a very large sulfidic Ni‐Co deposit that records enhanced organic matter accumulation during the global Shunga Event. Here, rock geochemistry and microscale S and Fe isotope composition of in situ pyrrhotites and pyrites are studied in well‐characterised, well‐preserved drill core samples.
Raimo Lahtinen, Jaakko J. Laitala, Joonas J. Virtasalo, Martin J. Whitehouse   +3 more
wiley   +1 more source

Evidence for oxygen-conserving diamond formation in redox-buffered subducted oceanic crust sampled as eclogite. [PDF]

Nat Commun, 2022
Aulbach S, Stachel T.
europepmc   +1 more source

The Seismic Expression of Core Complex‐Style Extensional Detachment Faults in Rifted Margins

Terra Nova, EarlyView.
ABSTRACT The identification of core complex‐style extensional detachment faults (CCDFs) in rifted margins is crucial for accurately restoring their stratigraphic and thermal histories. Yet recognising CCDFs in seismic reflection images is challenging due to their faint topographic expression; the lack of associated abrupt offset in seismic reflections;
Pauline Chenin, Gianreto Manatschal, Cuimei Zhang, Peng Chao   +3 more
wiley   +1 more source

Geochronological and geochemical constraints on juvenile continental crust formation in the Eocene Luzon intra-oceanic arc, Philippines

Geoscience Letters
The formation of juvenile felsic crust in intra-oceanic arcs (IOAs) represents a fundamental but poorly understood process in Earth's crustal evolution.
Karl D. Jabagat, Yuan-Hsi Lee, Wan-Ling Tsai, Hao-Yang Lee, Jillian Aira S. Gabo-Ratio, Carla B. Dimalanta   +5 more
doaj   +1 more source

Calcium isotope evidence for early Archaean carbonates and subduction of oceanic crust. [PDF]

Nat Commun, 2021
Antonelli MA, Kendrick J, Yakymchuk C, Guitreau M, Mittal T, Moynier F.   +5 more
europepmc   +1 more source

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, EarlyView.
ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Microbial Abundance and Diversity in Subsurface Lower Oceanic Crust at Atlantis Bank, Southwest Indian Ridge. [PDF]

Appl Environ Microbiol, 2021
Wee SY, Edgcomb VP, Beaudoin D, Yvon-Lewis S, Sylvan JB.   +4 more
europepmc   +1 more source

The source of the intermediate wavelength component of the Earth's magnetic field [PDF]

The intermediate wavelength component of the Earth's magnetic field has been well documented by observations made by MAGSAT. It has been shown that some significant fraction of this component is likely to be caused within the core of the Earth.
Harrison, C. G. A.
core   +1 more source

Emergence of Continents Stabilized the Bioavailability of Boron

Terra Nova, EarlyView.
ABSTRACT Boron is an essential element for the development of life on Earth; borates stabilize ribose in prebiotic reactions and facilitate metabolism in higher plants. There is, however, a relatively narrow surface boron concentration range over which borates stabilize and serve as a micronutrient rather than a toxin.
Brendan V. Dyck, Jon Wade
wiley   +1 more source