References in periodicals archive ?
By plotting of the major and trace elements data in these diagrams, it is concluded that the hydrothermal solution is responsible for the formation of the studied ores.
the first two steps of their formation) may have occurred from an undersaturated hydrothermal solution in a relatively slow, steady process.
The behavior of major and trace elements in the mineralized diorites, suggests that the hydrothermal solution responsible for the copper mineralization has effected, to a very extent, the diorites of the area.
Generally, K and other metal constituents are added to the mass rock by hydrothermal solutions, and it is easily observed in mafic/ultramafic units or along lithologic contacts where hydrothermal alteration such as silicification is intensive.
A-Hydrothermal Metasomatic deposits in carbonate and dolomitic rocks: Through this process mechanism, when hydrothermal solutions penetrate into the dolomitic rocks, because the ionic radius of calcium is about 36 % bigger than that of the Magnesium, these two elements therefore cannot replace one another isomorphically; however because the Iron ionic radius is not so much different from that of the Magnesium, a series of isomorphic minerals like Magnesite, Hontite, Bronzitite and etc.
These gravity lows identify fault zones, decalcified areas, and/or karst features that may serve as both channel-ways and hosts for gold bearing hydrothermal solutions, allowing these gold bearing solutions to permeate and form large volumes of higher grade gold mineralization.
A new type of hydrogen- and methane-rich hydrothermal solutions in the Rift zone of the Mid-Atlantic Ridge.
The mineralized fine-grained, impure carbonaceous ores are an interesting, but economically much less important, type of replacement ore in which hydrocarbons or their metallurgically active successors may have aided in the removal of gold from hydrothermal solutions.
Drilling at TZ has shown that the magnetic trough represents sulfide introduction and destruction of magnetite by hydrothermal solutions.
The hydrothermal solutions came up through a network of fractures and into the sedimentary cover rocks.
5 miles wide has been variably altered by shallow level hydrothermal solutions.
In addition, the potential for gold mineralization is increased because the overthrusted quartzite-phyllite causes ponding of the hydrothermal solutions in the limestone underneath.