Silicate melt inclusions (SMI) containing several daughter minerals, residual glass, and a CO2 bubble were analyzed to constrain the composition and evolution of the metasomatic melt present in the upper mantle beneath the Nógrád-Gömör Volcanic Field (NGVF), northern Hungary to southern Slovakia. The SMI were analyzed with a combination of Raman spectroscopy, FIB-SEM, and LA-ICP-MS to identify phases and obtain their volume proportions and major- and trace-element geochemistry. Slicing through the entire volume of the inclusions and collecting geochemical information at each slice with FIB-SEM allowed us to model the 3D appearance of the phases within the SMI and to use this information to calculate bulk major-element compositions.The partially crystallized SMI are hosted in clinopyroxene in a lherzolite xenolith that shows evidence of a metasomatic event that altered the lherzolites to produce wehrlites. Based on bulk compositions, the SMI trapped the metasomatic melt linked to wehrlite formation in the NGVF. The melt is enriched in Fe and has an OIB-like trace-element pattern, which suggests an intraplate mafic melt similar to the host basalt, but with slightly different chemistry. Pre-entrapment evolution and reaction with the lherzolite wall rock produced an intermediate melt composition. Petrogenetic modeling indicates that the melt was generated as a result of a very small degree of partial melting of a garnet lherzolite source. Following entrapment, a volatile bubble exsolved from the residual melt during ascent to shallow depths as suggested by consistent densities of CO2 in vapor bubbles. Small crystals, including sulfates and mica, that formed at the boundary of the bubble and the glass indicate that the exsolved fluid originally contained S and H2O, in addition to CO2.

中文翻译：

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基于拉曼成像，FIB-SEM和LA-ICP-MS分析尖晶石橄榄岩中硅酸盐熔体包裹体，表征了北部Pannonian盆地下地幔中的交化剂

分析了包含几种子矿物，残留玻璃和二氧化碳气泡的硅酸盐熔体包裹体（SMI），以限制存在于匈牙利北部至南部南部Nógrád-Gömör火山场（NGVF）下方上地幔中的交代熔体的组成和演化斯洛伐克。通过拉曼光谱，FIB-SEM和LA-ICP-MS的组合对SMI进行了分析，以鉴定相并获得其体积比以及主要和痕量元素的地球化学。通过对夹杂物的整个体积进行切片并使用FIB-SEM在每个切片上收集地球化学信息，使我们能够对SMI中各相的3D外观进行建模，并使用此信息来计算主要的主要元素组成。部分结晶的SMI容纳在锂铁矿异岩中的次氯吡喃中，该证据表明发生了交变事件，该事件改变了锂铁矿以生产辉绿岩。基于大量的成分，SMI捕获了与NGVF中的白云母形成有关的交代熔体。熔体富含铁，并具有类似OIB的痕量元素形态，这表明板内镁铁质熔体与主体玄武岩相似，但化学性质略有不同。捕集前的演化和与锂铁矿围岩的反应产生了中间熔体成分。岩石成因模型表明，由于石榴石锂沸石来源的极小程度的部分熔化而产生了熔体。被困之后 上升到浅深度时，残留的熔体中溶解的挥发性气泡，这是蒸气气泡中一致的CO2密度所暗示的。在气泡和玻璃的边界处形成的小晶体，包括硫酸盐和云母，表明溶解的流体除了CO2之外，最初还含有S和H2O。