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Negative Haloes and Geochemical Field Systems of Hydrothermal Deposits 1
Author(s) -
Kejian Ji,
Liben Wang,
Fengxiang Lu,
Wuyi Wang,
Jianhua Zhang
Publication year - 1993
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.1993.mp6002007.x
Subject(s) - hydrothermal circulation , geology , geochemistry , magmatism , mineral , skarn , field (mathematics) , mineral resource classification , halo , mineralogy , paleontology , astrophysics , chemistry , physics , fluid inclusions , mathematics , organic chemistry , galaxy , pure mathematics , tectonics
Primary haloes of hydrothermal deposits were previously considered as positive haloes. Although it has been recently suggested that primary haloes incude positive and negative ones, almost all the research work on primary haloes has still focused on positive haloes for various reasons. In order to understand the source of ore substances a number of large hydrothermal deposits related to magmatism including porphyry, skarn and vein type deposits have been studied. It has been found that negative haloes exist on the peripheries of positive haloes of a mineral deposit. On the basis of the study the authors propose the concept of the geochemical field system of ore‐forming elements of hydrothermal deposits, i. e., with the orebody as the centre outwards there occur the mineralized field, positive halo field, depleted field and background field successively.