Results 91 to 100 of about 8,675 (209)

Peridotite weathering is the missing ingredient of Earth’s continental crust composition

Nature Communications, 2018
The concentration of Ni and Cr of the continental crust cannot be explained by formation models involving differentiated magmatic rocks. Here, the authors show that hydrothermal alteration and chemical weathering of ultramafic rock compensates for the ...
Andreas Beinlich, Håkon Austrheim, Vasileios Mavromatis, Ben Grguric, Christine V. Putnis, Andrew Putnis   +5 more
doaj   +1 more source

Quantifying the effects of hydrogen on carbon assimilation in a seafloor microbial community associated with ultramafic rocks. [PDF]

ISME J, 2022
Coskun ÖK, Vuillemin A, Schubotz F, Klein F, Sichel SE, Eisenreich W, Orsi WD.   +6 more
europepmc   +1 more source

Petrochemistry of Ultramafic Rock in Baula - Pomalaa Ophiolite Complex, Southeast Sulawesi, Indonesia

JGEET: Journal of Geoscience, Engineering, Environment and Technology
Baula and Pomalaa Ophiolitic Complexes are part of East Sulawesi Ophiolite (ESO). The ultramafic rocks in the Baula and Pomalaa Ophiolite Complex mainly is peridotite and consist of harzburgite, lherzolite and olivine websterite, mostly serpentinized ...
Rio Irhan Mais Cendrajaya, Laode Ihksan Juarsan, Masri, Al Rubaiyn, Syahrul, Neni, Suci Ramadani, Hasria   +7 more
doaj   +1 more source

Compressional wave velocity measurements on mafic-ultramafic rocks under high aqueous fluid pressure and temperature help to explain low-velocity zones in the lithosphere. [PDF]

Sci Rep, 2021
Lebedev EB, Kern H, Pavlenkova NI, Lukanin OA, Lobanov KV, Zharikov AV, Popp T.   +6 more
europepmc   +1 more source

Widespread abiotic methane in chromitites

Scientific Reports, 2018
Recurring discoveries of abiotic methane in gas seeps and springs in ophiolites and peridotite massifs worldwide raised the question of where, in which rocks, methane was generated.
G. Etiope, E. Ifandi, M. Nazzari, M. Procesi, B. Tsikouras, G. Ventura, A. Steele, R. Tardini, P. Szatmari   +8 more
doaj   +1 more source

Percolation of Dioritic Melts Through Ultramafic Cumulate Mushes Forms High‐Mg Intermediate Igneous Rocks

Geophysical Research Letters
Percolation of dioritic melts through ultramafic cumulate mushes and their reaction and hybridization have been documented in some arcs, but the impact of the processes on the compositions of arc igneous rocks is not yet fully understood.
Wei Xu, Qing Wang, Roberto F. Weinberg, Di‐Cheng Zhu, Shi‐Hong Tian   +4 more
doaj   +1 more source

The characterised of Serpentinized Ultramafic Rocks from South Sulawesi, Indonesia [PDF]

, 2011
This paper report for the first time petrology and geochemistry of highly serpentinzed ultramafic rocks from South Sulawesi, Indonesia. Their petrogenesis and their geodynamic significance were also discussedHighly serpentinised ultramafic rocks occur in
Christy, Andrew, Imai, Akira, Watanabe, Koichiro, Ellis, David, Maulana, Adi   +4 more
core  

Peak temperatures of ultra-high temperature metamorphism of the Napier Complex, Enderby Land, East Antarctica, as deduced from porphyroclastic pyroxenes of meta-ultramafic rocks

, 2002
P(論文)In the Mt. Riiser-Larsen area of the Archaean Napier Complex, an ultra-high temperature (UHT) metamorphic complex, Enderby Land, East Antarctica, meta-ultramafic rocks occur as blocks and pods embedded in orthopyroxene felsic gneiss or garnet felsic
Nakamura, Aki, Ishizuka, Hideo, Suzuki, Satoko   +2 more
core   +1 more source

Quantitative chemical analyses of rocks with X-ray fluorescence analyzer: (1) Major elements

Antarctic Record, 1995
Analytical procedures for major elements in rocks (Si, Ti, Al, Fe, Mn, Mg, Ca, Na, K, P), using a newly installed X-ray fluorescence analyzer (RIGAKURIX3000) at the National Institute of Polar Research, are summarized.
Yoichi Motoyoshi, Kazuyuki Shiraishi
doaj   +1 more source

Assessing the Carbon Sequestration Potential of Ultramafic Rocks in the Kolaka Ophiolite Complex, Southheastern Sulawesi: A Petrographic, Geochemical, and Mineralogical Study

JGEET: Journal of Geoscience, Engineering, Environment and Technology
Climate change has prompted significant global interest in carbon sequestration technologies, particularly using geological formations. This study investigates the potential of ultramafic rocks from the Kolaka Ophiolite Complex in Southeast Sulawesi for ...
Syahrul, La Ode Dzakir, Riska, Rio Irhan Mais Cendra jaya, Masri   +4 more
doaj   +1 more source