Tellurium and selenium in Mesoproterozoic red beds
Tellurium and selenium in Mesoproterozoic red beds
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DOI：
10.1016/j.precamres.2017.12.022
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发表时间：
2018-02
影响因子：
3.8
通讯作者：
J. Parnell;S. Spinks;C. Brolly
中科院分区：
文献类型：
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作者：
J. Parnell;S. Spinks;C. Brolly
几个中元古代系列的红层沉积物样本富含碲 (Te)，包括离散的碲化物矿物。碲化物是在氧化还原控制的成岩作用过程中新形成的，而不是代表重矿物的机械浓度。碲相对于硒富集，这可能反映了太古代和古元古代岩石中碲含量较高的侵蚀。中元古代时期的高大陆性限制了碲和其他微量元素向海洋的输送，因此碲在大陆上积累。
Samples of red bed sediments in several Mesoproterozoic successions contain enrichments of tellurium (Te), including discrete telluride minerals. The tellurides were neoformed during redox-controlled diagenesis, rather than representing mechanical concentrations of heavy minerals. Tellurium is enriched relative to selenium, which may reflect erosion of Archean and Palaeoproterozoic rocks with high Te contents. High continentality during the Mesoproterozoic would have limited the delivery of Te and other trace elements to the oceans, so accumulated Te on the continents.