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  2. Sedimentary exhalative deposits - Wikipedia

    en.wikipedia.org/.../Sedimentary_exhalative_deposits

    The sedimentary appearance of the thin laminations led to early interpretations that the deposits formed exclusively or mainly by exhalative processes onto the seafloor, hence the term SEDEX. However, recent study of numerous deposits indicates that shallow subsurface replacement is also an important process, in several deposits the predominant ...

  3. Hydrothermal mineral deposit - Wikipedia

    en.wikipedia.org/wiki/Hydrothermal_mineral_deposit

    Sedimentary exhalative (SEDEX) deposits account for 40% of total world zinc production, 60% of lead and a significant proportion of silver. Despite their economic importance however, sedex deposits are relatively rare. A worldwide compilation of sedex deposits indicates that about 70 are known, of which 24 have been or are being mined.

  4. Ore genesis - Wikipedia

    en.wikipedia.org/wiki/Ore_genesis

    For example, sedimentary exhalative deposits (SEDEX), are a class of ore deposit formed on the sea floor (sedimentary) by exhalation of brines into seawater (exhalative), causing chemical precipitation of ore minerals when the brine cools, mixes with sea water, and loses its metal carrying capacity.

  5. Marine sediment - Wikipedia

    en.wikipedia.org/wiki/Marine_sediment

    Marine sediment, or ocean sediment, or seafloor sediment, are deposits of insoluble particles that have accumulated on the seafloor.These particles either have their origins in soil and rocks and have been transported from the land to the sea, mainly by rivers but also by dust carried by wind and by the flow of glaciers into the sea, or they are biogenic deposits from marine organisms or from ...

  6. Sulfide deposit - Wikipedia

    en.wikipedia.org/wiki/Sulfide_deposit

    A sulfide deposit is an ore body or rock containing a great deal of sulfide minerals. Articles on this topic include: Seafloor massive sulfide deposits; Sedimentary exhalative deposits; Volcanogenic massive sulfide ore deposit; Massive sulfide deposits

  7. Volcanogenic massive sulfide ore deposit - Wikipedia

    en.wikipedia.org/wiki/Volcanogenic_massive...

    VMS deposits have a wide variety of morphologies, with mound shaped and bowl shaped deposits most typical. The bowl-shaped formations formed due to venting of hydrothermal solutions into submarine depressions - in many cases, this type of deposit can be confused with sedimentary exhalative deposits. The mound-shaped deposits formed in a way ...

  8. Sedimentology - Wikipedia

    en.wikipedia.org/wiki/Sedimentology

    The aim of sedimentology, studying sediments, is to derive information on the depositional conditions which acted to deposit the rock unit, and the relation of the individual rock units in a basin into a coherent understanding of the evolution of the sedimentary sequences and basins, and thus, the Earth's geological history as a whole.

  9. Broken Hill ore deposit - Wikipedia

    en.wikipedia.org/wiki/Broken_Hill_ore_deposit

    This is a classification grouping of similar deposits for use in ore genesis theories and mineral exploration methodologies. [10] The key criteria for BHT ore deposits are; [11] Association with major sedimentary packages of sandstone and siltstone protoliths sequences in highly disturbed metamorphic terranes.