Question
Explain the characteristics of ophiolite hosted Cu-Zn deposits and Exhalative oxide ore deposits.
Answer :
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Ophiolite-hosted Cu-Zn deposits are a distinctive class of ore deposits associated with ancient oceanic crustal sequences that have been tectonically emplaced onto continental margins. These deposits are commonly linked with ultramafic to mafic volcanic rocks, including peridotites, gabbros, and basalts, which are typical components of ophiolite complexes. One of the key characteristics of ophiolite-hosted Cu-Zn deposits is their stratiform and stratabound nature, meaning the mineralization occurs in layers conformable with the host rock stratigraphy. Copper in these deposits is usually present as chalcopyrite, bornite, or covellite, while zinc is mainly found as sphalerite. These deposits often show close spatial association with serpentinized ultramafics
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