Web2 jan. 2024 · In hydrothermal systems, discrete chlorite occurs at a minimal temperature near 200°C, regardless of its chemical composition. In diagenetic systems, discrete … Web1 jan. 1992 · Finally, the temperatures of chlorite formation were between 77.6 and 144.7°C [Cathelineau, 1988, Jowett, 1991 and 81.9 to 99.7°C [Kranidiotis and Maclean, 1987], …
Mineralogical Characteristics and Short‐wave Infrared Spectra of ...
WebChlorite minerals are found in rocks altered during deep burial, plate collisions, hydrothermal activity, or contact metamorphism. They are also found as retrograde minerals in igneous and metamorphic rocks … Web20 aug. 2024 · The hydrothermal sediments in this study have been grouped into four types based on the mineralogy and geochemistry (following section): mixed … feplgpo
Mineralogical and geochemical effects due to hydrothermal …
Web1 mei 2015 · The biotite chloritization involves two essential formation mechanisms: chlorite formation (CF) mechanism 1, small volume decrease from biotite to chlorite and large inflow of metallic ions such as Al 3+ , Fe 2+ , Mn 2+ , and Mg 2+ from the hydrothermal fluid, and CF mechanism 2, large volume decrease and large outflow of the metallic ions into ... Webhydrothermal system. The most abundant minerals are chlorite, epidote, quartz, calcite und sericite. Zeolite, several types of clay minerals, potassium feldspar, albite, prehnite, amphibole, hematite, pyrite and hydrothermal garnet are also present. Chlorites show a relatively homogenous Fe-clinochlore composition. Epidotes are solid solutions ... WebPropylitic alteration is a type of hydrothermal alteration that occurs in volcanic and plutonic rocks. It is characterized by the alteration of primary minerals, such as feldspar and quartz, to secondary minerals, such as chlorite, epidote, and sericite.Propylitic alteration typically occurs at lower temperatures (less than 200°C) and involves the introduction of hydrogen … fepl 145.05 02