Proceedings on formation mechanism and evolution process of porphyry copper deposits show that formation of copper-rich porphyry magma involved a series of processes as follows: formation of ore-bearing magma related to subduction of oceanic crust or detachment of continental lithospheric crust, ...
aFormation of volcanic rocks of the original magma to the surface from deep in the migration process, law of the major elements and trace elements will change. Ratio of abundance of trace elements in volcanic rocks, group, closely related to the nature of the original magma. Through the study...
Based on the main driving force of plate motion (the slab pull force generated by the descent of the oceanic plate in subduction zones) and the three primary mechanisms for magma generation (adding fluid, increasing temperature, and decreasing pressure), the continent-continent collisional process ...
Which process is most involved in the formation of sedimentary rock? a. melting b. chemical weathering c. crystallization of magma d. deformation due to pressure How do metamorphic rocks form by contact metamorphism? How can metamorphic rock be transformed into igneous rock? How are extrusive rock...
that the first stage involves the flotation and aggregation of plagioclase during the cooling of the magma ocean, forming the primitive lunar crust, while the second stage includes the overturn and melting of the mantle, the formation of magnesian-suite rocks and the reformation of the lunar ...
that the first stage involves the flotation and aggregation of plagioclase during the cooling of the magma ocean, forming the primitive lunar crust, while the second stage includes the overturn and melting of the mantle, the formation of magnesian-suite rocks and the reformation of the lunar ...
To avoid the formation of very small crystals which have a detrimental effect on the quality of the massecuite, the mother liquor of the fraction of massecuite employed for the production of magma is kept slightly undersaturated during the milling to ensure the remelting of the very fine ...
(e.g., Penrose-type), are rare even in Phanerozoic ophiolites, so their absence in older ophiolites is inconclusive. In fact, the generation of a sheeted dyke complex requires a delicate balance between the rates of spreading andmagmasupply for a sustained period such that sufficient melt ...
Based on the main driving force of plate motion (the slab pull force generated by the descent of the oceanic plate in subduction zones) and the three primary mechanisms for magma generation (adding fluid, increasing temperature, and decreasing pressure), the continent-continent collisional process ...
The crystallization of magma is a complex process because magma is a complex substance. Certain magmas, such as those which form granites, contain several percent water dissolved in them. When a granitic magma cools, the first minerals to crystallize tend to be anhydrous (e.g., feldspar), so...