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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Partial melting ： ウィキペディア英語版 Partial melting Partial melting occurs when only a portion of a solid is melted. For mixed substances, such as a rock containing several different minerals or a mineral that displays solid solution, this melt can be different from the bulk composition of the solid. Partial melting occurs where the solidus and liquidus temperatures are different. For single minerals this can happen when they exhibit solid solution, for example in olivines between iron and magnesium. In rocks made up of several different minerals, some will melt at lower temperatures than others. Partial melting is an important consideration in geology with respect to the chemical differentiation of crustal rocks. Virtually all rocks on Earth derive from material from the interior of the earth that has been partially melted.〔(Partial Melting )〕 The main places where partial melting occurs are subduction zones, mid-ocean ridges and hotspots. In all these places partial melting is often associated with volcanism, although some melts do not make it to the surface. Partial melts are thought to play an important role in enriching old parts of the continental lithosphere in incompatible elements. Partial melts produced at depth move upwards due to the compaction of the surrounding matrix. ==Gallery== File:Partial Melting Phase Diagram.svg|Melting of a substance exhibiting solid solution, with a bulk composition of CB. As the temperature rises, the solid follows the blue path, and begins melting at temperature TA. The initial liquid produced has the composition CL, and its composition follows the red path. At temperature TB the whole solid has melted. Image:Partial melting asthenosphere EN.svg|Diagram showing the physical processes inside the Earth that lead to the generation of magma. A to D are different plate tectonic settings. Image:Coats Fig1.jpg|Subduction in the Aleutian Islands by Robert R. Coats (1962). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Partial melting」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.