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Characteristics of Sulfur Isotope in Kalatongke Cu-Ni Deposit and Its Geological Significance(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2010年第04期
Page:
344-343
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Characteristics of Sulfur Isotope in Kalatongke Cu-Ni Deposit and Its Geological Significance
Author(s):
SUN Tao1; 2;  QIAN Zhuang-zhi1; 2;  DANG Xin-sheng3;  JIAO Jian-gang1; 2;  YAN Hai-qing1; 2;  WANG Jian-zhong1; 4
(1. School of Earth Sciences and Resources, Chang'an University, Xi'an 710054, Shaanxi, China; 2. Key Laboratory of Western Mineral Resources and Geological Engineering of Ministry of Education, Chang'an University, Xi'an 710054,Shaanxi, China; 3. Xinjiang Xinxin Mining Compary Limited, Urumqi 830057, Xinjiang, China; 4. No.8 GoldGeological Party, Chinese People's Armed Police Force, Urumqi 830057, Xinjiang, China)
Keywords:
sulfur isotope;  minor element;  magma segregation;  Cu-Ni deposit;  Kalatongke;  Xinjiang
PACS:
P618.41;P619.21+6
DOI:
-
Abstract:
The study on sulfur isotope is of great importance to revealing the process of crustal contamination in Kalatongke mafic-ultramafic intrusion. The concentrations of sulfur isotope of chalcopyrite, pyrite, pyruhotite in massive sulfide, disseminated sulfide, speckled and veined ores and wall rocks were analyzed; and the characteristic of sulfur isotope in Kalatongke Cu-Ni deposit and its geological significance were discussed. The results showed that per thousand deviations between measured isotope and standard values δ(34S)of massive, disseminated, speckled and veined ores and pyrite in wall rock were(-1.30-1.84)×10-3,(-2.50-0.85)×10-3,(-1.54-3.00)×10-3 and(-7.8--3.3)×10-3, respectively; concentrations of sulfur isotope in sulfide were pyrite, pyruhotite and chalcopyrite in descending order, and it basically achieved sulfur isotope equilibrium among the sulfides; the sulfur in Kalatongke Cu-Ni deposit was mainly derived from mantle, traces of crustal sulfur contamination were little or partial in disseminated ores which formed in the process of magma segregation, vein ores which formed in postmagmatic hydrothermal stage, and pyrite which formed in postmagmatic later stage; the crust-derived sulfur did not enter into the magma source zone, it would be partly occurr in the process of the magma rising and sulfide segregation in situ, almost had little affect on sulfur saturation and sulfide segregation; the fractional crystallization of olivine and chromite occurred in deep crustal magma may be the major factor to promote sulfur saturation and sulfide segregation.

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Last Update: 2010-12-20