Paleomagnetism of the Late Archean Nyanzian System, western Kenya
نویسندگان
چکیده
منابع مشابه
The Late Archean Biospheric Explosion
biogenic platform carbonates [4]. By c.2.45 Ga oxygen levels had begun to rise in the Earth’s atmosphere setting the stage for the evolution of the modern biosphere. Here we focus on concretionary structures, which can act as sensitive barometers of biological activity, to provide us with potential insights into the expansion of this early biosphere prior to the first appearance of oxygen in th...
متن کاملLate Archean biospheric oxygenation and atmospheric evolution.
High-resolution geochemical analyses of organic-rich shale and carbonate through the 2500 million-year-old Mount McRae Shale in the Hamersley Basin of northwestern Australia record changes in both the oxidation state of the surface ocean and the atmospheric composition. The Mount McRae record of sulfur isotopes captures the widespread and possibly permanent activation of the oxidative sulfur cy...
متن کاملOrigin and significance of aromatic hydrocarbons in giant iron ore deposits of the late Archean Hamersley Basin, Western Australia
Late Archean to earliest Paleoproterozoic shales associated with two giant iron ore deposits in the Hamersley Province, Western Australia, contain traces of solvent extractable saturated and aromatic hydrocarbons. The host rocks belong to the 2.5 billion years (Ga) old Mt McRae Shale and Brockman Iron Formation, Hamersley Group, and were collected in mines near Tom Price and Newman (Mt Whalebac...
متن کاملa study on construction of iranian life tables: the case study of modified brass logit system
چکیده ندارد.
15 صفحه اولLow temperature magnetic properties of the Late Archean Boolgeeda iron formation (Hamersley Group, Western Australia): environmental implications
Citation: Carlut J, Isambert A, Bouquerel H, Pecoits E, Philippot P, Vennin E, Ader M, Thomazo C, Buoncristiani J-F, Baton F, Muller E and Deldicque D (2015) Low temperature magnetic properties of the Late Archean Boolgeeda iron formation (Hamersley Group, Western Australia): environmental implications. Front. Earth Sci. 3:18. doi: 10.3389/feart.2015.00018 Low temperature magnetic properties of...
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ژورنال
عنوان ژورنال: Precambrian Research
سال: 1994
ISSN: 0301-9268
DOI: 10.1016/0301-9268(94)90082-5