AMS-NRM interferences in the Deccan basalts: Toward an improved understanding of magnetic fabrics in flood basalts
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Understanding cratonic flood basalts
The origin of continental flood basalts has been debated for decades. These eruptions often produce millions of cubic kilometers of basalt on timescales of only a million years. Although flood basalts are found in a variety of settings, no locale is more puzzling than cratonic areas such as southern Africa or the Siberian craton, where strong, thick lithosphere is breached by these large basalt...
متن کاملSiberian Flood Basalts
techniques and fractionation correcting to a 194Pt/ 95pt ratio of 0.9734 (38). 33. E. Anders and N. Grevesse, Geochim. Cosmochim. Acta 53, 197(1989). 34. M. P. Gorton, E. S. Schandl, A. J. Naldrett, Ocean Drilling Project Scientific Results, Leg 140, in press. 35. R. J. Walker et al., Geochim. Cosmochim. Acta 58, 4179 (1994); M. F. Horan, R. J. Walker, V. A. Fedorenko, G. K. Czamanske, ibid., i...
متن کاملUnderstanding the Chlorine Isotopic Compositions of Apatites in Lunar Basalts
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متن کاملHigh water content in primitive continental flood basalts
As the main constituent of large igneous provinces, the generation of continental flood basalts (CFB) that are characterized by huge eruption volume (>10(5) km(3)) within short time span (<1-3 Ma) is in principle caused by an abnormally high temperature, extended decompression, a certain amount of mafic source rocks (e.g., pyroxenite), or an elevated H2O content in the mantle source. These four...
متن کاملUnderstanding the Chlorine Isotopic Composition of Apatites in Lunar Basalts
Introduction: On Earth δCl = ~0 ± 5 ‰ [1]. For lunar rocks elevated δCl values of up to 35 ‰ have been reported in apatites [1,2]. The initial study interpreted the elevated δCl in lunar rocks as a result of metal chlorides degassing in low-H2O environments [1]. Additional data [3,4] have shown high-δCl values in samples with apatite containing appreciable amounts of H2O (>2000 ppm). Metasomati...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2014
ISSN: 2169-9313
DOI: 10.1002/2013jb010660