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Lateral Variation of Zinc Isotopes in Dongshengmiao Ore Deposit, Inner Mongolia, China
Author(s) -
GAO Zhaofu,
ZHU Xiangkun
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 - 10.1111/1755-6724.12384_6
Subject(s) - beijing , chinese academy of sciences , china , geology , tectonics , earth science , mining engineering , geochemistry , library science , archaeology , paleontology , geography , computer science
Zinc isotopes have seen an increasing interest as a potential tool for tracing hydrothermal fluid migration in large ore-forming systems. Previous zinc isotope studies of spatial distribution on deposit scale revealed the increase of isotope values from the early to late stage (Wilkinson et al., 2005; John et al., 2008; Kelley et al., 2009; Zhou et al, 2014). However, large zinc isotopic variations were observed in the colloform texture growth banding at the hand specimen scale which indicated that the fractionation process is likely to have occurred at very short spatial scale, thereby limiting the use of Zn isotopes as exploration tool within deposits (Gagnevin et al., 2012). Without the complexity of large-scale ore-forming systems, here we investigate zinc isotope spatial distribution within a single orebody from the Dongshengmiao deposit. The Dongshengmiao SEDEX-type Pb-Zn deposit is located in the Langshan district, an important polymetallic ore belt in the western segment of the northern margin of the North China Craton. The main orebody whose average thickness is 14.38m is more than 1 km long in lateral extent. The availability of detailed information on the geology and exploration of the main orebody makes it an ideal object to study the variability in zinc isotopes on orebody scale.