Mass-production of Cambro-Ordovician quartz-rich sandstone as a consequence of chemical weathering of Pan-African terranes: Environmental implications

Avigad D; Sandler A; Kolodner K; Stern RJ; McWilliams M; Miller N; Beyth M

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Mass-production of Cambro-Ordovician quartz-rich sandstone as a consequence of chemical weathering of Pan-African terranes: Environmental implications

机译：泛非地球化学风化的结果，导致坎布-奥陶纪富含石英的砂岩大规模生产：对环境的影响

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A vast sheet of mature quartz sand blanketed north Africa and Arabia from the Atlantic coast to the Persian Gulf in Cambro-Ordovician times. U-Pb geochronology of a representative section of Cambrian sandstone in southern Israel shows that these sediments are dominated by 550-650 Ma detrital zircons derived from Neoproterozoic Pan-African basement. The short time lag between magmatic consolidation of a Pan-African source and deposition of its erosional products indicates that, despite their significant mineralogical maturity, the voluminous quartz-rich sandstones on the northern margin of Gondwana are essentially first-cycle sediments.

机译：在坎布罗-奥陶纪时期，一大片成熟的石英砂覆盖了北非和阿拉伯，从大西洋沿岸到波斯湾。以色列南部寒武纪砂岩代表性断面的U-Pb年代学表明，这些沉积物主要由新元古代泛非地下室衍生的550-650 Ma碎屑锆石构成。泛非烃源岩的岩浆固结与其沉积产物的沉积之间存在很短的时间间隔，这表明，尽管其矿物学成熟度很高，但冈瓦纳北缘的大量富含石英的砂岩基本上是第一周期沉积物。

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来源
《Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System》 |2005年第4期|共9页
作者
Avigad D; Sandler A; Kolodner K; Stern RJ; McWilliams M; Miller N; Beyth M;
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正文语种 eng
中图分类天文学、地球科学;
关键词
Cambra-Ordovician; sandstone; Gondwana; chemical weathering; CRUSTAL EVOLUTION; PHANEROZOIC TIME; GONDWANA MARGIN; ATMOSPHERIC CO2; ORIGIN; EAST; PROVENANCE; SEQUENCE; BASINS; ARABIA;

机译：坎布拉-奥陶纪;砂岩;冈瓦纳;化学风化;地壳演化;古生代时间;冈瓦那边际;大气CO2;来源;东部;物源;序列;盆地;阿拉伯;

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机译：泛非地球化学风化的结果，导致坎布-奥陶纪富含石英的砂岩大规模生产：对环境的影响
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机译：泛非地球化学风化的结果是大量生产坎布罗-奥陶纪石英富集砂岩：对环境的影响

Mass-production of Cambro-Ordovician quartz-rich sandstone as a consequence of chemical weathering of Pan-African terranes: Environmental implications

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