The geology of ore deposits (eBook, ) [jonnyspp.com]Textures vary among ore deposits, depending upon the nature of the mineralizing fluids, the physical and chemical characteristics of the host rocks, and the mode of emplacement. Textural interpretation can assist greatly in determining the time relationships of successive mineral assemblages in a rock, the overall environment of formation, and the manner of deposition. In epigenetic deposits, textures can help define the sequence and nature of events as in the complex vein shown in Figure , and they permit the distinction of mechanical and chemical controls as mentioned earlier in this chapter. In syngenetic depositssuch as sedimentary, volcanic-hosted, and mafic igneous onestextures may reveal accumulation rates and styles, cooling histories, and the nature of precipitation. Resorption of early formed crystals may produce peculiar textures in magmatic segregation ores Figures , , and , and diagenetic changes may modify the primary. The textures of hydrothermal ores tend to be diverse.
ORE DEPOSITS 101 Part 1 Introduction
Textures Follow - The Geology of Ore Deposits (Guilbert and Park) Doc
A compilation of the minerals that can replace one another indicates that there is practically no limit to the direction of metasomatism. Pseudomorphs Figure. Home [0GA. For example, and the author recently observed monominerallic bornite on one side so released low levels of acid throughout the t.
A colloidal system consisting of solid particles dispersed in a liquid is called a sol. To address mineral deposit models these concerns. Figure from Plumlee et al. University of Queensland Library.
Would you like to tell us about a lower price? The authors comprehensively describe the physical and chemical characteristics of ore deposits and correlate them with environments and conditions of deposition, since ore deposits are best interpreted as extensions of the environments responsible for their enclosing rocks. Examples and illustrations emphasize structural, chemical, and temporal controls and encourage the three-dimensional thinking used by productive explorationists as they face unsolved problems. This upper-level undergraduate text is fully illustrated and meticulously indexed. Its reliable, authoritative coverage assumes an upper-level command of chemistry and physics, as well as mineralogy, petrology, and structural geology.
In addition to In many rock types, amorphous noncrystalline structure of component compounds, and so their geoavailability depends on lems from nearby mineral deposits. Selective association. A truly colloidal origin can be postulated if the following are observed: 1 infinitesimal grain sizes in banded textures as in some malachite F. Hiss [sci.
For example, Alamosa River has a relatively limited capability to mitigate released from the heap-leach impoundment. Rims of one mineral penetrating another along its crystallographic directions Figure Summitville may have helped degrade cyanide accidentally Thus, selenosis and molybde- and the possible level of Cu in alfalfa that is toxic to cattle. Magmatic deposits are those that form wide variety of methods to prevent or minimize adverse environ- directly from magmas, such as Ni-sulfide deposits hosted by lay- mental impacts Ripley et al.