Boninites翻译
WebFeb 5, 2024 · At site U1439C, high-Si boninites overlie low-Si boninites and have been interpreted to reflect the temporal transition from an extensional (‘axial’) to off-axis (possibly proto-stratovolcano) emplacement setting (Reagan et al., 2015; Li et al., 2024) as well as the evolution of the mantle wedge during arc infancy (Reagan et al., 2024).As a harzburgitic … WebAbstract. Boninites are unusual high MgO-high SiO 2 2 contents (0.1-0.5%) indicate severe depletion of this source. K, Rb, Sr and Ba abundances in boninites are typical of primitive arc basalts, but ratios such as Ti/Zr and La/Yb are variable ( Ti/ Zr = 23-67, ( La/ Yb) e. f. = 0.6-4.7). Evidence for both enrichment and depletion of incompatible elements suggests …
Boninites翻译
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WebDec 15, 2011 · Gold concentrations in unmineralised igneous, sedimentary and metamorphic rocks range from 0.05 to 20 ppb with average concentrations commonly between 0.5 and 5 ppb. Analytical methods with ultra ... Webboninites confirm earlier ideas that they may be the products of partial melting of peridotite in hydrous conditions, whereas basaltic komatiites have been assumed to result from …
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WebJan 1, 2002 · Boninites are high Mg andesites that are thought to form in suprasubduction zone tectonic environments as primary melts from refractory mantle. Boninites provide a potential constraint on tectonic models for ancient terranes that contain boninites because the only unequivocal tectonic setting in which "modern" boninites have been recognized … teori evaluasi dampak kebijakanWebBoninite is a high magnesium mafic extrusive rock formed in back-arc environments, typically in seafloor spreading centres but also in terrestrial back-arc spreading centres. The rock is named for its occurrence in the Izu-Bonin arc south of Japan. Boninite is considered to be a primitive andesite derived from melting of metasomatised mantle.. Similar … teori etika teleologi adalahWebJan 1, 1989 · Boninites are classified, based on their major element systematics, into low-Ca (CaO/Al 2 O 3 < 0.75) and high-Ca (CaO/Al 2 O 3 > 0.75) [110]. The Cape Vogel in … teori evaluasi kebijakanWebThe boninites represent second-stage melts derived from previously depleted mantle in subduction zone environment [König et al., 2010; Shchipansky, 2016]. They are classified into high-Ca type ... teori evaluasi implementasi kebijakanWebDec 1, 2012 · Notably, the mantle source entering the mantle wet zone is residual to the melt extraction beneath the infant-arc spreading center and is remelted due to water … teori evaluasi kebijakan menurut para ahliWeb2. Doc Translator使用强大的Google翻译功能来翻译文档。. 我们多此一举了?. Doc Translator依赖不断改进的 Google翻译 服务能力,以此处理文档中的文本,并将其翻译成您所需要的语言。. 3. 已翻译的文本将被重新插入到文档中,并保持原始排版。. 无需再从文档 … teori evaluasi kebijakan william dunn pdfWeb1.百度翻译. 老牌好用的翻译软件,支持200多种语言的互译,同时拥有文字翻译、文档翻译、截图翻译、划词翻译等多种翻译模式。. 软件的文档翻译就能轻松帮我们解决PDF翻译的难题,我们在软件主界面中点击“文档翻译”便能进入文档翻译操作界面。. 在界面 ... teori evaluasi kebijakan menurut william dunn