tonalite वाक्य
उदाहरण वाक्य
मोबाइल
- The presence of significant quartz makes the rock type " quartz-diorite " ( > 5 % quartz ) or tonalite ( > 20 % quartz ), and if orthoclase ( potassium feldspar ) is present at greater than 10 percent, the rock type grades into " monzodiorite " or granodiorite.
- Gold-bearing ( + /-Ag, W, Sb, As, Cu, Mo, Pb, Te, Zn, Hg ) veins occur in the tonalite, in small amounts in the schist, and in the Jurassic ? migmatite, but not in the western quartz monzonite or in the Tertiary sediments.
- The ideal scenario according to Bowen's reaction series would see a granite melt begin crystallizing a cumulate assemblage of plagioclase and hornblende ( i . e .; tonalite or diorite ), which is low in K ( and hence Rb ) but high in Sr ( as this substitutes for Ca ), which proportionally enriches the melt in K and Rb.
- In total, the Western Gneiss Terrane sub-blocks represent an earlier substrate upon which the majority of the Yilgarn Craton's c . 2.70 to 2.55 Ga greenstone metavolcanic belts have been deposited and into which the voluminous Archaean trondhjemite-tonalite-granodiorite ( TTG ) suite and trondhjemite-tonalite-diorite ( TTD ) suite granites were emplaced.
- In total, the Western Gneiss Terrane sub-blocks represent an earlier substrate upon which the majority of the Yilgarn Craton's c . 2.70 to 2.55 Ga greenstone metavolcanic belts have been deposited and into which the voluminous Archaean trondhjemite-tonalite-granodiorite ( TTG ) suite and trondhjemite-tonalite-diorite ( TTD ) suite granites were emplaced.
- The Barberton greenstone belt consists of a sequence of mafic to ultramafic lavas and metasedimentary rocks emplaced and deposited between 3.5 and 3.2 Ga . The granitoid rocks were emplaced over a 500-million-year time span and can be divided into two suites : The tonalite-trondhjemite-granodiorite ( TTG ) suite ( emplaced approximately 3.5 3.2 Ga ), and the granite-monzogranite-syenitegranite ( GMS ) suite ( emplaced approximately 3.2 3.1 Ga ).
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