Results 171 to 180 of about 35,079 (237)
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Earth-Science Reviews, 2019
The Meso-Neoproterozoic period, sometimes referred to as the ‘boring billion’ or ‘Earth's middle age’, spans the interval between the formation of the Columbia and Rodina supercontinents. It is regarded as a stable era of the Earth.
San-zhong Li +16 more
semanticscholar +1 more source
The Meso-Neoproterozoic period, sometimes referred to as the ‘boring billion’ or ‘Earth's middle age’, spans the interval between the formation of the Columbia and Rodina supercontinents. It is regarded as a stable era of the Earth.
San-zhong Li +16 more
semanticscholar +1 more source
Precambrian Research, 2019
A widespread mafic sill and dyke unit (the Pedro Lessa suite) adjacent to the southeastern Sao Francisco (SF) craton (eastern South America) is dated as 940 ± 42 Ma, 912 ± 17 Ma, and 986 ± 64 Ma (based on combined ID-TIMS and LA-ICPMS analyses on ...
A. Chaves +5 more
semanticscholar +1 more source
A widespread mafic sill and dyke unit (the Pedro Lessa suite) adjacent to the southeastern Sao Francisco (SF) craton (eastern South America) is dated as 940 ± 42 Ma, 912 ± 17 Ma, and 986 ± 64 Ma (based on combined ID-TIMS and LA-ICPMS analyses on ...
A. Chaves +5 more
semanticscholar +1 more source
First- and second-order global sequence stratigraphic correlations and accommodation charts for the Kaapvaal, Karelian, São Francisco (-Congo) and Slave cratons: An introduction [PDF]
Marine and Petroleum Geology, 2012 This work provides a pilot study of global sequence stratigraphic correlation for the Precambrian for five chosen cratons. Detailed chronostratigraphic charts summarize the supracrustal geological evolution of each craton, and are in the form of ...
A J Bumby, O Cătuneanu, P G Eriksson
exaly +3 more sources
Widespread refertilization of cratonic and circum-cratonic lithospheric mantle
Earth-Science Reviews, 2013article i nfo Studies of mantle xenoliths have confirmed that Archean subcontinental lithospheric mantle (SCLM) is highly depleted in basaltic components (such as Al, Ca and Na) due to high-degree extraction of mafic and ultramafic melts and thus is refractory and buoyant, which made it chronically stable as tectonically independent units.
Yan-Jie Tang +3 more
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2022
<p>The term craton has a complex and confused etymology. Despite originally specifying only strength and stability &#8211; of the crust &#8211; the term craton has seen widespread use as referring to a region characterised by crustal basement older than 2.5 Ga, despite the fact that some such &#8220;cratons&
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<p>The term craton has a complex and confused etymology. Despite originally specifying only strength and stability &#8211; of the crust &#8211; the term craton has seen widespread use as referring to a region characterised by crustal basement older than 2.5 Ga, despite the fact that some such &#8220;cratons&
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Geology, 2018
Mobilistic plate-tectonic interpretation of Precambrian orogens requires that two conjoined crustal blocks may derive from distant portions of the globe.
J. Salminen +8 more
semanticscholar +1 more source
Mobilistic plate-tectonic interpretation of Precambrian orogens requires that two conjoined crustal blocks may derive from distant portions of the globe.
J. Salminen +8 more
semanticscholar +1 more source
Thermal evolution of cratons in China
Journal of Asian Earth Sciences, 2018Craton’s thermal state is one of the main gateways to understand the craton dynamics. Three cratons in China, the Tarim, North China, and Yangtze cratons, are in different thermal states and differ in their stabilities.
Lijuan He, Linyou Zhang
semanticscholar +1 more source
Can metasomatic weakening result in the rifting of cratons?
Tectonophysics, 2017Cratons are strong and their preservation demonstrates that they resist deformation and fragmentation. Yet several cratons are rifting now, or have rifted in the past. We suggest that cratons need to be weakened before they can rift.
S. Wenker, C. Beaumont
semanticscholar +1 more source
Cratonic Lithosphere Delamination and Relamination Explain the Temporal Variation of Cratons
2023Cratonic lithosphere delamination has been frequently suggested in recent studies. However, the fate of the delaminated Sub-Cratonic Lithospheric Mantle (SCLM) has not been thoroughly investigated. Here, we use 2D numerical models to study the evolution of initially delaminated SCLM whose density is initially larger than that of the ambient mantle. Our
Lihang Peng, Lijun Liu, Liang Liu
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