تعتبر شركة Olux شركة رائدة ومتميزة على المستوى الدولي في مجال البحث والتطوير وتصنيع وبيع محطات التكسير والغربلة واسعة النطاق ومعدات الطحن الصناعية ومصانع الاستفادة.
Porphyry Cu–Au deposits are typically associated with oxidized intermediate or felsic calc-alkaline magmas (Pettke et al. 2010; Sillitoe 2010; Wilkinson 2013). Porphyry deposits host about two-thirds of the world's Cu resources, critical for the green energy transition (Singer 2017).
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The most compatible rare earth elements in the amphibole structure are dysprosium (Dy) and holmium (Ho). The fractionation between LREE/MREE ( Amph/L D La / Amph/L D Sm = 0.12–0.08) and ( Amph/L D La / Amph/L D Yb = 0.09–0.06) decreases slightly with temperature for calcic amphiboles (Table 5 ).
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Here we report results from experiments in which natural mélange materials were partially melted at upper mantle conditions to produce alkaline magmas.
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We show that trace element ratios such as Nb/Ta and Dy/Yb systematically decrease with increasing SiO 2, for both the 17–16 Ma calc-alkaline and the 12–13 Ma K-rich …
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We propose that such nepheline-normative dykes are a hallmark of hydrous cumulate melting in subvolcanic plumbing systems. Therefore, ne-normative dykes in arc …
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We show that magnetite starts to fractionate only at MgO ≤ 4 wt% for nearly all arc magmas and thus has no bearing on the early Fe depletion in calc-alkaline arc magmas. The Fe enrichment at MgO > 4 wt% for tholeiitic arc magmas is largely caused by clinopyroxene …
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Porphyry Cu–Au deposits are typically associated with oxidized intermediate or felsic calc-alkaline magmas (Pettke et al. 2010; Sillitoe 2010; Wilkinson 2013). Porphyry deposits host about two-thirds of the world's Cu resources, critical …
WhatsApp: +86 18221755073
The most compatible rare earth elements in the amphibole structure are dysprosium (Dy) and holmium (Ho). The fractionation between LREE/MREE ( Amph/L D La / Amph/L D …
WhatsApp: +86 18221755073
We show that trace element ratios such as Nb/Ta and Dy/Yb systematically decrease with increasing SiO 2, for both the 17–16 Ma calc-alkaline and the 12–13 Ma K-rich transitional magmatism. In contrast, Th/Nb and La/Nb monitor the changes in the source composition of these magmas.
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We propose that such nepheline-normative dykes are a hallmark of hydrous cumulate melting in subvolcanic plumbing systems. Therefore, ne-normative dykes in arc batholiths may indicate periods with high magma fluxes.
WhatsApp: +86 18221755073
We propose that such nepheline-normative dykes are a hallmark of hydrous cumulate melting in subvolcanic plumbing systems. Therefore, ne-normative dykes in arc …
WhatsApp: +86 18221755073
These characteristics are generated by the fractionation of amphibole and the suppression of plagioclase crystallization from hydrous calc-alkaline magmas.
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Mantle melting at mid-ocean ridges produces dry magmas that differentiate at low-pressure conditions, resulting in early plagioclase saturation, late oxide precipitation, and Fe-enrichment in mid-ocean ridge basalts (MORBs).
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Mantle melting at mid-ocean ridges produces dry magmas that differentiate at low-pressure conditions, resulting in early plagioclase saturation, late oxide precipitation, and Fe …
WhatsApp: +86 18221755073
We propose that such nepheline-normative dykes are a hallmark of hydrous cumulate melting in subvolcanic plumbing systems. Therefore, ne-normative dykes in arc batholiths may indicate periods with high magma fluxes. The online version contains supplementary material available at 10.1007/s00410-023-02047-3.
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We show that magnetite starts to fractionate only at MgO ≤ 4 wt% for nearly all arc magmas and thus has no bearing on the early Fe depletion in calc-alkaline arc magmas. The Fe enrichment at MgO > 4 wt% for tholeiitic arc magmas is …
WhatsApp: +86 18221755073
In thin arcs, porphyry Cu–Au deposits are associated with both low-K and high-K calc-alkaline magmas as well as with alkaline magmas (Chiaradia, 2020).
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