Results 21 to 30 of about 173,020 (351)

Lithium Isotopic Compositions of Mesozoic and Cenozoic Basalts From South-Eastern China: Implications for Extremely Low δ7Li of Continental-Type Eclogites

open access: yesFrontiers in Earth Science, 2022
Lithium isotope geochemical studies of oceanic-type eclogites benefited from previous investigation of altered oceanic crust; however, processes of lithium isotope exchange operating on altered protoliths of continental-type eclogites have remained ...
Cheng-Long Yu   +10 more
doaj   +1 more source

Relations between vertical and horizontal movements of the Earth crust

open access: yesGeodesy and Cartography, 2012
Horizontal and vertical movements of the Earth crust are interrelated, because the same forces affecting the Earth crust cause them. There is a both-side interrelation between deformations of the Earth crust and spreading of tectonic tensions.
Algimantas Zakarevičius
doaj   +1 more source

Fisher's “Earth's Crust” [PDF]

open access: yesNature, 1882
THE verdict of NATURE on the Rev. O. Fisher's “Physics of the Earth's Crust” is that “One or two points do seem to emerge from this assemblage of calculation as fairly clear and established on tolerably firm foundation. Such as that the contraction of the earth by cooling is inadequate to the production of its greater inequalities.”..
openaire   +2 more sources

Paradoxically lowered oxygen isotopes of hydrothermally altered minerals by an evolved magmatic water

open access: yesScientific Reports, 2022
It has been well known that the influxing meteoric water can hydrothermally lower oxygen and hydrogen isotopes of rocks and/or minerals during continental magmatic or metamorphic processes in certain appropriate cases.
Chun-Sheng Wei, Zi-Fu Zhao
doaj   +1 more source

Determination of Silicon Isotopic Compositions of Rock and Soil Reference Materials by MC-ICP-MS

open access: yesYankuang ceshi, 2023
BACKGROUND With the analytical technique development, the precision of Si isotopes analysis increases rapidly.Silicon isotopes are widely used in geochemistry, cosmochemistry, environmental chemistry and so on, and can be used to trace the circulation of
YANG Lin   +3 more
doaj   +1 more source

Collisional stripping of planetary crusts [PDF]

open access: yes, 2017
Geochemical studies of planetary accretion and evolution have invoked various degrees of collisional erosion to explain differences in bulk composition between planets and chondrites.
Carter, Philip J.   +4 more
core   +3 more sources

Geochemical insights into the role of metasomatic hornblendite in generating alkali basalts

open access: yesGeochemistry, Geophysics, Geosystems, 2014
Experimental petrology suggested the role of hornblendite in generating alkali basalt. This mechanism is confirmed by an integrated study of major‐trace elements and radiogenic isotopes for Mesozoic alkali basalts from the Qinling orogen in China.
Li‐Qun Dai   +2 more
doaj   +1 more source

Research on the Negative Externalities Evaluation for the Development of Weathered Crust Elution-Deposited Rare Earth Ores

open access: yesAdvances in Materials Science and Engineering, 2020
To standardize the specification of negative externality management of mining resources development and promote the process of marketization and diversification of ecological compensation, the article reviews the perspective and method of quantitative ...
Xu Ligang, Xu Meijuan
doaj   +1 more source

Geo-neutrinos and Silicate Earth Enrichment of U and Th

open access: yes, 2010
The terrestrial distribution of U, Th, and K abundances governs the thermal evolution, traces the differentiation, and reflects the bulk composition of the earth.
Abe   +51 more
core   +1 more source

The Crust of the Earth [PDF]

open access: yesScientific American, 1918
n ...
openaire   +1 more source

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