Results 1 to 10 of about 32,483 (245)

Archean versus Phanerozoic oceanic crust formation and tectonics: Ophiolites through time

Geosystems and Geoenvironment, 2022
A global compilation of structural, lithological, and geochemical data on a selection of Archean, Proterozoic and Phanerozoic magmatic complexes, interpreted as ophiolites, is presented.
Harald Furnes, Yildirim Dilek
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Copper Isotope Fractionation in Archean Hydrothermal Systems: Evidence From the Mesoarchean Carlow Castle Cu‐Co‐Au Deposit

Geochemistry, Geophysics, Geosystems, 2023
Copper isotope analysis has emerged as a promising tool for understanding genetic processes in Cu ore deposits. However, applications of this analytical technique to Archean Cu deposits have been extremely limited, even though Archean terranes are among ...
David C. M. Fox, Lucy E. McGee, Juraj Farkaš, Justin L. Payne, Samuel C. Spinks, Milo Barham, Mehrooz Aspandiar   +6 more
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Water‐Induced Mantle Overturns Leading to the Origins of Archean Continents and Subcontinental Lithospheric Mantle

Geophysical Research Letters, 2023
The origins of Archean continents and subcontinental lithospheric mantle (SCLM) were important events in the early Earth. The mechanisms for the origins of Archean continents and the SCLM remain unclear.
Zhongqing Wu, Jian Song, Guochun Zhao, Zhongxu Pan   +3 more
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Reservoir-forming rules and main controlling factors of Archean buried hill reservoir of middle to northern Liaoxi Uplift in Liaodong Bay area in Bohai Bay Basin

Shiyou shiyan dizhi
The Bohai Bay Basin is one of the key areas for the exploration of buried hill oil and gas resources in China. In order to create a new prospect for the exploration of the Archaean buried hills in this area, the reservoir-forming laws and main ...
Longlong GUO, Jun WANG, Chunguang ZHANG, Hongde CHEN   +3 more
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Temporal and Hf isotope geochemical evolution of southern Finnish Lapland from 2.77 Ga to 1.76 Ga [PDF]

Bulletin of the Geological Society of Finland, 2012
The southern Finnish Lapland area in the central part of the Fennoscandian shield is a geologically complex zone comprising several Archean blocks and Paleoproterozoic supracrustal belts all of which are intruded by voluminous Paleoproterozoic granites ...
L.S. Lauri, T. Andersen, J. Räsänen, H. Juopperi   +3 more
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Phonetic or morpholexical issues in L2 speech? A pilot study of ambiguity assessment for pedagogical purposes among Japanese learners of French

Language Testing in Asia
When second language (L2) learners speak in their L2, they can make errors involving one or several distinct linguistic levels (e.g., pronunciation errors, wrong lexical and morphosyntactic choices).
Sylvain Detey, Verdiana De Fino, Lionel Fontan   +2 more
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Gravitational Potential Energy per Unit Area as a Constraint on Archean Sea Level

Geochemistry, Geophysics, Geosystems, 2018
To constrain the density structure of Archean lithosphere, I assume that gravitational potential energy (GPE) per unit area at Archean spreading centers equals that for continents whose surfaces lay near sea level.
Peter Molnar
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"Clifford's Rule" and the geodynamics of kimberlite magmatism

Геофизический журнал, 2013
The Clifford rule emphasizes the association of kimberlite magmatism with the crust areas of Archean and Early Proterozoic age. Though there are diamantiferous and highly productive primary diamond deposits outside Archean cratons, the Clifford rule is ...
O. V. Aryasova, Ya. M. Khazan
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Petrogenesis of the Kanker Granites From the Bastar Craton: Implications for Crustal Growth and Evolution During the Archean-Proterozoic Transition

Frontiers in Earth Science, 2020
Archean-Proterozoic boundary represents a significant transitional phase in the Earth's history. Bastar Craton is one of the major Archean cratons in the Indian subcontinent with voluminous granites, supracrustal rocks, and tectonic belts.
Ajay Dev Asokan, R. Elangovan, Neeraj Vishwakarma, K. R. Hari, M. Ram Mohan   +4 more
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Komatiites From Mantle Transition Zone Plumes

Frontiers in Earth Science, 2020
During the Archean, episodic volcanism commonly included both plume- and arc-type magmatism, raising the issue of a possible link between “bottom up” and “top down” geodynamic processes.
Derek Wyman
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