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They're the same point, but reached from opposite directions. ie, partial melting is where a solid has partially melted into a liquid, while fractional crystallisation is where a liquid has only partially become a solid.

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What is thought to form by partial melting and in situ crystallization of the melted portion?

migmatite


How is partial melting related to fractional crystallization?

Partial melting occurs in rocks because the different minerals that compose rocks have different melting points. For example, felsic minerals (e.g. quartz and feldspar) melt at around 700 degrees Celsius while mafic minerals (e.g. pyroxene and olivine) melt at around 1200 degrees Celsius. Therefore, felsic minerals will melt first leaving the mafic minerals solid.Fractional crystallization occurs when minerals from a magma cool and crystallize out of the magma. The first crystals to melt in partial melting will be the first minerals to crystallize out when the magma begins to cool. Therefore, mafic minerals will crystallize first, followed by felsic minerals.Both partial melting and fractional crystallisation tend to produce a more felsic magma than their source rocks.The difference is simply that they are the reverse of one another, heat it up, cool it down. Things that melt first solidify last and separate from one another.


Most basaltic magmas are believed to form by partial melting of granite in the lower crust and upper mantle?

Basaltic magmas are typically formed by partial melting of the upper mantle, specifically the mantle wedge above subduction zones. This process occurs at high temperatures and low pressures, resulting in the generation of magma rich in iron and magnesium. The melting of granite in the lower crust is less common but can also give rise to basaltic magmas through processes such as assimilation and fractional crystallization.


Basalt is generated by?

Basalt is generated by the solidification of lava that erupts from volcanoes. It is a common igneous rock that forms from the cooling and crystallization of molten rock material.


The process by which different minerals melt at different temperatures is called?

Fractional crystallization is the process where different minerals melt at different temperatures. This process occurs during the cooling of magma or lava, where minerals crystallize and separate based on their melting points.


What is the origin of the chemical elements in the minerals in nonfoliated rock?

The chemical elements in minerals found in nonfoliated rocks are typically sourced from the cooling and solidification of molten magma. As the magma cools and crystallizes, minerals form with specific chemical compositions based on the elements present in the original magma. These elements are derived from the Earth's mantle and crust through processes such as partial melting, fractional crystallization, and assimilation of surrounding rocks.


What is the opposite of impartial?

partial


What physical properties could be used to separate two different substances?

Boiling point is a physical property. Alcohol and water can be separated by distillation because they have different boiling points. Alcohol boils at a lower temperature water. In distillation, the vapor is collected and condensed back into a liquid. The condensed liquid will have a higher proportion of alcohol to water than the original mixture.Fractional freezing is a process used in proses engineering and chemistry to separate substances with different melting points. It can be done by partial melting of a solid, for example in zone refining of silicon or metals, or by partial crystallization of a liquid, for example "freeze distillation", also called "normal freezing" or "progressive freezing".Partial crystallization can also be achieved by adding a dilute solvent to the mixture, and cooling and concentrating the mixture by evaporating the solvent, a process called "solution crystallization".[1] Fractional freezing is generally used to produce ultra-pure solids, or to concentrate heat-sensitive liquids.


What rocks would exhibit evidence of partial melting?

Rocks such as migmatites, which are a mixture of igneous and metamorphic rock formed through partial melting, would exhibit evidence of this process. Additionally, some granites and gneisses can show signs of partial melting due to the presence of melt pockets or segregated mineral assemblages.


What is the opposite word for partial?

The antonyms for the word partial are complete, entire, whole, or total.


Can Small amounts of water can lower partial melting temperatures in silicate rocks?

Yes, small amounts of water can lower the partial melting temperatures of silicate rocks by promoting the breakdown of mineral structures, reducing viscosity, and increasing mobility of magma. Water can act as a flux, helping to facilitate melting at lower temperatures.


What is the opposite of the word planning?

A partial opposite of "planning" (preparation) could be impulse, spontaneity, or whim. A partial opposite of "planning" used for "as the result of planning" could be fortuitousness, unexpectedness, coincidence, happenstance, or fluke.