Hydrothermal Alteration in Mineral Exploration
A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Deposits".
Deadline for manuscript submissions: closed (23 October 2022) | Viewed by 1217
Special Issue Editors
Interests: Ore deposits and metallogeny in general, with special focus on magmatic-hydrothermal deposits, their mineralogy, structure, timing and the sources for ore-bearing fluids, metals an other components by using tools like fluid inclusions and stable isotopes.
Special Issue Information
Dear Colleagues,
Hydrothermal alteration of host rocks has always been one of the most relevant tools in mineral exploration due to its intrinsic association with ore. Each type of deposit presents particular configurations or architecture of alteration assemblages in time and space, posing numerous challenges in the characterization of ore genesis and the location of ore bodies. Broadly speaking, the mineralogy, elemental and isotopic geochemical features as well as the spatial distribution and timing of hydrothermal alteration assemblages depend on the reactivity between different types of fluids and host rocks, the composition of host rocks and fluids, multiple events of hydrothermal activity, the physical state of fluids, temperature, depth and pressure, pH, Eh, the mutable position of the phreatic water table, type of magmatic activity, structural framework, sources for fluids, or the occurrence of physical phenomena such as boiling, among many other factors. Therefore, the correct understanding of alteration assemblages comes necessarily from a multi-scalar approach. For instance, the types of mineral deposits in which both ore and alteration assemblages are relatively indifferent from the composition of host rocks (especially when host rocks and fluids have a low reactivity) require a different approach than those in which the composition of hypogene minerals is tightly associated to that of minerals in host rocks. “Classic” hypogene alteration assemblages (phyllic, potassic, argillic, propylitic, etc.) may be present in a broad variety of types of deposits but occur in different space configurations and, beyond any generalization by types, the particularities of each single deposit pose additional challenges in interpretation and exploration endeavors.
This special issue is devoted to the characterization of hydrothermal alteration assemblages with an intended bend toward their use as exploration proxies, but also any aspect that relates to progress in the understanding of mineralizing systems that is focused on alteration is equally welcome. Any mineralization system with which an associated hydrothermal alteration is expected, whatever its arrangement may be, is susceptible of being of interest for this special issue. What is relevant for mineral deposits is relevant for geothermal systems as well — therefore, contributions about the mineralogy of alteration assemblages in active hydrothermal systems and the associated exploration strategies are also encouraged. The expected contributions may be formulated around (m)any analytical techniques, spanning from petrographic or geochemical to remote sensing studies.
Dr. Antoni Camprubí
José Perelló
Guest Editors
Manuscript Submission Information
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Keywords
- hypogene alteration
- supergene alteration
- ore deposit
- phyllic alteration
- potassic alteration
- propylitic alteration
- argillic alteration
- advanced argillic alteration
- sodic alteration
- talcose alteration
- magnesic alteration
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