Contemporaneously erupted tholeiitic and calc-alkaline magmas in the Archean Colomb-Chaboullié greenstone belt, James Bay, Quebec: Petrologic implications
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چکیده
منابع مشابه
Depositional and tectonic setting of the Archean Moodies Group, Barberton Greenstone Belt, South Africa.
The 3.22-3.10 Ga old Moodies Group, uppermost unit of the Swaziland Supergroup in the Barberton Greenstone Belt (BGB), is the oldest exposed, well-preserved quartz-rich sedimentary sequence on earth. It is preserved in structurally separate blocks in a heavily deformed fold-and-thrust belt. North of the Inyoka Fault, Moodies strata reach up to 3700 m in thickness. Detailed mapping, correlation ...
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We conducted a survey to identify the intestinal parasites and enteropathogenic bacteria involved in episodes of diarrhea in the James Bay (Quebec) Cree, a previously unsurveyed area of Canada. 382 stool samples obtained from a random sample of the population were examined; 29.3% were positive for at least one parasite and 21 different serotypes of enteropathogenic Escherichia coli (EPEC)were i...
متن کاملArchean spherule layers in the Barberton Greenstone Belt, South Africa: A discussion of problems related to the impact interpretation
This review of the current knowledge of impact spherule layers in the Barberton greenstone belt, together with new petrographic, geochemical, and field data on a number of impact and volcanic spherical particle horizons, highlight a number of problems with the proposition of frequent and large meteorite impacts during mid-Archean times. Field data indicate that some of the four previously propo...
متن کاملAtmospheric record in the Hadean Eon from multiple sulfur isotope measurements in Nuvvuagittuq Greenstone Belt (Nunavik, Quebec).
Mass-independent fractionation of sulfur isotopes (S-MIF) results from photochemical reactions involving short-wavelength UV light. The presence of these anomalies in Archean sediments [(4-2.5 billion years ago, (Ga)] implies that the early atmosphere was free of the appropriate UV absorbers, of which ozone is the most important in the modern atmosphere. Consequently, S-MIF is considered some o...
متن کاملPrevalence of low and high birthweight among the James Bay Cree of northern Quebec.
cator of neonatal health. Aboriginal women tend to give birth to a greater percentage of high birthweight babies than non-Aboriginal women. However, the birthweight distribution among the Canadian native population and particularly among the Cree has not been well documented. The aim of this study was to document the birthweight distribution, determine the prevalence of low and high birthweight...
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ژورنال
عنوان ژورنال: Precambrian Research
سال: 2019
ISSN: 0301-9268
DOI: 10.1016/j.precamres.2019.105363