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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
September 17, 2020 • 00:53 am
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir please elaborate these two terms. : residual liquid segregation and residual liquid injection
These deposits are formed by the following processes Residual Liquid Segregation : Basic magmas undergoing differentiation may sometimes become enriched in iron and titanium. This residual liquid may drain out from the crystal interstices and consolidate w Residual Liquid Injection:
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Sajan sarthak
injection The iron-rich residual liquid accumulated in the above manner may be subjected to movement because of: a. Gentle tilting (causing lateral movement). b. Pressure and be squirted out to places of lesser pressure. In both cases it may be injected into adjacent rocks and even in the earlier consolidated parent silicate mass. Examples: Titanomagnetite Deposits, Adirondack Region, New York; Allard Lake Deposits; Magnetite Deposits of Kiruna, Sweden. Residual liquid segregation: In certain mafic magmas residual liquid gets enriched in Fe,Ti and volatiles and settle at the bottom of the magma chamber or crystallize in the interstices of the early formed crystal.
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sir why in the ending phase of magma Rich in volatiles. they should be escaped earlier.
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Veer vikram singh Best Answer
Residual Liquid Segregation: Magma evolve during crystallization. crystals either float or sink in magma. after formation of crystals the remaining magma is separated from crystallized minerals and this process is called residual Liquid Segregation. Residual Liquid injection: after segregation, if magma or hydrothermal fluid encounter any zone of weakness such as fissures, fault etc then magma is pushed in those regions and crystallize there. this process is called residual Liquid injection
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sir as per picture, " basic magma undergoing differentiation may sometimes become enriched in fe and ti " what does this mean sir.
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as fe is early Cristalising in mafic magma.
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basic magmas can be highly enriched in Fe so even after crystallization, significant amount of Fe may remain un crystallized. Hence Fe will go in melt. Ti is largely incompatible element hence during crystallization it tend to remain in residual Liquid
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Rahul kumar
Residual liquid segregation: Magma, specifically of basic composition gets enriched in iron and titanium after undergoing through differentiation process. This final residual liquid may drain out and lead to crystallization. Typical example of such kind of deposit is Titaniferous magnetite bands of Bushveld complex. Residual liquid injection: In the case of residual liquid injection the liquid is squeezed out towards places of less pressure into the surrounding rock or the interstitial liquid may be filter pressed out forming late magmatic injections. Titaniferous magnetite deposits is a suitable example of such deposits.