| 11. | It commonly accompanies metasomatism and is often a feature of wall rock alteration around ore bodies.
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| 12. | Exoskarns occur at and outside the granite which produced them, and are alterations of wall rocks.
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| 13. | Here, fluids react less via chemical exchange of ions, but because of the redox-oxidation potential of the wall rocks.
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| 14. | However, the widest use of the word is in describing the metasomatised zones of wall rock adjacent to granites.
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| 15. | Gravity surveying can be used to detect dense bodies of rocks within host formations of less dense wall rocks.
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| 16. | In volcanoes, wall rock can often become broken off the wall and incorporated into the erupted volcanic rock as xenoliths.
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| 17. | Semi-massive sulfides are more common and are composed of 75-90 % Fe-Ni-Cu sulfides with inclusions of olivine and wall rocks.
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| 18. | Whilst fractional crystallisation is the dominant process, it can be triggered in the magma body by assimilation of the wall rocks.
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| 19. | Higher temperatures also allow mafic magmas to assimilate wall rocks more readily and therefore contamination is more common and better developed.
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| 20. | However, slip on low angle normal faults could be facilitated by fluid pressure, as well as by weakness of minerals in wall rocks.
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