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DOI | 10.1038/NGEO2965 |
Cumulate causes for the low contents of sulfide-loving elements in the continental crust | |
Jenner, Frances Elaine1,2 | |
2017-07-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA |
英文摘要 | Despite the economic importance of chalcophile (sulfide-loving) and siderophile (metal-loving) elements (CSEs), it is unclear how they become enriched or depleted in the continental crust, compared with the oceanic crust. This is due in part to our limited understanding of the partitioning behaviour of the CSEs. Here I compile compositional data for mid-ocean ridge basalts and subduction-related volcanic rocks. I show that the mantle-derived melts that contribute to oceanic and continental crust formation rarely avoid sulfide saturation during cooling in the crust and, on average, subduction-zone magmas fractionate sulfide at the base of the continental crust prior to ascent. Differentiation of mantle-derived melts enriches lower crustal sulfide-and silicate-bearing cumulates in some CSEs compared with the upper crust. This storage predisposes the cumulate-hosted compatible CSEs (such as Cu and Au) to be recycled back into the mantle during subduction and delamination, resulting in their low contents in the bulk continental crust and potentially contributing to the scarcity of ore deposits in the upper continental crust. By contrast, differentiation causes the upper oceanic and continental crust to become enriched in incompatible CSEs (such as W) compared with the lower oceanic and continental crust. Consequently, incompatible CSEs are predisposed to become enriched in subduction-zone magmas that contribute to continental crust formation and are less susceptible to removal from the continental crust via delamination compared with the compatible CSEs. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404621000016 |
WOS关键词 | LA-ICP-MS ; ARC MAGMAS ; CHALCOPHILE ELEMENTS ; MANTLE ; SUBDUCTION ; FRACTIONATION ; MELT ; SYSTEMATICS ; EVOLUTION ; THALLIUM |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35020 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Open Univ, Sch Environm Earth & Ecosyst Sci, Walton Hall, Milton Keynes MK7 6AA, Bucks, England; 2.Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA |
推荐引用方式 GB/T 7714 | Jenner, Frances Elaine. Cumulate causes for the low contents of sulfide-loving elements in the continental crust[J]. NATURE GEOSCIENCE,2017,10(7). |
APA | Jenner, Frances Elaine.(2017).Cumulate causes for the low contents of sulfide-loving elements in the continental crust.NATURE GEOSCIENCE,10(7). |
MLA | Jenner, Frances Elaine."Cumulate causes for the low contents of sulfide-loving elements in the continental crust".NATURE GEOSCIENCE 10.7(2017). |
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