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diagenesis |
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diagenesisSum of all processes, chiefly chemical, that produce changes in a sediment after its deposition but before its final lithification. Usually, not all the minerals in a sediment are in chemical equilibrium, so changes in interstitial water composition or in temperature or in both will lead to chemical alteration of one or more of the minerals present. Diagenesis is considered a relatively low-pressure, low-temperature alteration process that involves such processes as cementation, reworking, replacement, crystallization, and leaching. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Sedimentary Iron formations (BIF) A A deposits Oolitic iron A A Sedimentary phosphates K K Manganese deposits A A Barite in black shales K K Diagenetic Copper in pelites K A deposits Uranium sandstones K K Discordant uranium A ? Unconformity uranium deposits are typically associated with fault systems and are usually formed as a result of diagenetic and hydrothermal processes. The burrow mottles became dolomitized later in the diagenetic process, as magnesium-rich fluids were able to pass through them, but not through the surrounding material (Kendall, 1977; Coniglio, 1999; Gingras et al. |
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