Results 211 to 220 of about 18,181 (272)

Using detrital zircon to reconstruct Neoproterozoic crustal thickness variation in the northwestern margin of the Yangtze Block. [PDF]

Sci Rep
Gu Q, Xing F, Wei X, Azmy K, Li K, Liang A, Wen J, Liu Z, Sun H, Wang G, Liu X, Yi J.   +11 more
europepmc   +1 more source

Apatite-Calcite U-Pb Geochronology, Trace Element and C-O-Sr-Pb Isotope Geochemistry from the Polychronous Mundwara Alkaline Complex: New Evidence of Mid-Cretaceous Pre-Deccan Carbonatite Magmatism in North-Western India

N. V. Chalapathi Rao, Sudipa Bhunia, Andrea Giuliani, Lorenzo Tavazzani, Debojit Talukdar, Rohit Pandey, Alok Kumar, Shadi Ansari, Bernd Lehmann   +8 more
openalex   +1 more source

Predicted Bacterial Metabolic Landscapes of the Sumaco Volcano: A Picrust2 Analysis of 16S rRNA Data from Amazonian Ecuador. [PDF]

Microorganisms
Jarrín-V P, Carrión-Olmedo JC, Loján P, Reyes-Barriga D, Lara M, Oña A, Quiroz-Moreno C, Castillejo P, Tenea GN, Díaz M, Monfort-Lanzas P, Molina CA.   +11 more
europepmc   +1 more source

Aegirine-melt element partitioning in alkaline magmatic systems

, 2016
Beard, C., van Hinsberg, V., Stix, J., Wilke, M.   +3 more
openaire   +2 more sources

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Precambrian alkaline magmatism

Lithos, 1996
Abstract There are very few alkaline rocks in Precambrian terrains. The oldest well-documented examples are 2.7 Ga trachytes and leucite phonolites from the Kirkland Lake region of Canada. These rocks are highly potassic, with major- and trace-element characteristics closely resembling those of shoshonitic lavas in modern island arcs.
J. Blichert-Toft, N.T. Arndt, J.N. Ludden   +2 more
openaire   +1 more source

Volatiles in alkaline magmatism

Lithos, 1990
Abstract Gases extracted during fusion of volcanic glasses substantiate other sources of evidence that alkaline magmatism is distinguished from calc-alkaline by higher CO2 + SO2 contents, with relatively smaller proportions of H2O. In addition to higher C and S activity, alkaline magmas are characterised by high Cl and F, which are released with ...
D.K. Bailey, C.M. Hampton
openaire   +1 more source

Cycles of alkaline magmatism

Geochemistry International, 2006
Geochronological data (∼1800 dates) have been analyzed by the probabilistic statistical analysis of samplings of different subalkaline and alkaline rocks through the whole of geological time. The distribution of five groups of subalkaline and alkaline rocks within the Late Archean-Phanerozoic are strictly controlled by mantle cycles, which were ...
Yu. A. Balashov, V. N. Glaznev
openaire   +1 more source

First alkaline magmatism during Iberia–Newfoundland rifting

Terra Nova, 2008
AbstractThe age and origin of alkaline rocks emplaced into the sediments of the rift‐related continental Lusitanian basin were investigated to constrain earliest magmatic activity occurring prior to oceanic plate formation between Iberia and Newfoundland.
Grange, M., Scharer, U., Cornen, G., Girardeau, J.   +3 more
openaire   +3 more sources

Intraplate alkaline magmatism: mineralogy and petrogenesis

Mineralogical Magazine, 2003
This thematic set contains seven papers arising from the session of the same name at the 18th General Meeting of the International Mineralogical Association (IMA), held in Edinburgh in September 2002. This session was a combination of two separate original proposals: a session on Intraplate Alkaline Magmatism that was to be a follow-up to the ‘Friends ...
K. M. Goodenough, I. M. Coulson, F. Wall
openaire   +1 more source

Neoproterozoic alkaline magmatism at Sivamalai, southern India

Gondwana Research, 2006
Abstract The Sivamalai alkaline complex lies at the southern margin of the Cauvery Shear System that separates the Archaean and Proterozoic domains of the Southern Granulite Terrain in India. U–Pb TIMS dating of zircon from a pegmatitic syenite sample in the complex yields a concordant age of 590.2 ± 1.3 (2σ) Ma which is interpreted to date the ...
D. Upadhyay, S. Jahn-Awe, C. Pin, J.L. Paquette, I. Braun   +4 more
openaire   +1 more source