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Characteristics of Disseminated Diaspore in the Longzhou Bauxite Deposit, Guangxi Province, China
Author(s) -
WANG Yan,
XING Shuwen,
ZHANG Yong,
ZHANG Zengjie,
MA Yubo,
DU Xiaohui,
WANG Xin
Publication year - 2014
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 - 10.1111/1755-6724.12382_22
Subject(s) - metallogeny , beijing , china , mineral resource classification , mining engineering , geology , geochemistry , geography , archaeology , pyrite , sphalerite
Mineralogical investigation reveals that diaspore is the main mineral; pyrophyllite, kaolinite, gibbsite and hematite are minor accessories, and rutile is a relict mineral. Diaspore crystallizes in the orthorhombic dipyramidal class and is often associated with kaolinite, pyrophyllite and other clay minerals, and accompanied by hematite. Semi-quantitative XRD results reveal that the modal mineral proportions are diaspore (36.5% 37% ), pyrophyllite (38.60% 46.70% ), kaolinite (6.10% 15.5%), gibbsite (1.6% 3.10%) and hematite (6.60 6.90%) but that these widely in their abundance. The rutile abundance (0.70%) is relatively consistent. The relatively large quantities of silicates decrease A/S ratio and present difficulties for mineral separation.