Lithogeochemical Investigations Applied to Exploration for Sediment-Hosted Lead-Zinc Deposits
作者： N. G. Lavery , D. L. Leach , J. A. Saunders
DOI: 10.1007/978-3-662-03054-7_20
关键词:
摘要: Sediment-hosted stratiform massive sulphide (Sedex) deposits and Mississippi Valley-type (MVT) differ in morphology, but there is considerable overlap their host rock lithology, regional setting, size, grade, metal ratios, age of rocks, lead isotopes, sulphur genesis. Recent advances the understanding basin-derived formation fluids provide a framework for interpreting lithogeochemical signatures these deposits. The composition ore both types controlled part by fluid-rock reactions within sedimentary basins, nature sediments source fluids, thermal gradient basin, migratory history physical chemical conditions depositional environment cause variations patterns present. Studies modern waters indicate that diagenetic basins can liberate dissolve significant amounts metals. most metal-enriched are brines with more than 200 000 ppm total dissolved solids. Some contain several hundred combined Fe, Zn, Pb, Ba, minor Cu, Ag, Mn, Cd, As, Sb, Ni, Co, Mo, Tl.
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