Multiple Sulfur Isotope Analyses Support a Magmatic Model for the   Volcanogenic Massive Sulfide Deposits of the Teutonic Bore Volcanic   Complex, Yilgarn Craton, Western Australian

doi:10.2113/econgeo.110.6.1411

CORC > 北京大学 > 地球与空间科学学院

	Multiple Sulfur Isotope Analyses Support a Magmatic Model for the Volcanogenic Massive Sulfide Deposits of the Teutonic Bore Volcanic Complex, Yilgarn Craton, Western Australian
	Chen, Mimi ; Campbell, Ian H. ; Xue, Yunxing ; Tian, Wei ; Ireland, Trevor R. ; Holden, Peter ; Cas, Raymond A. F. ; Hayman, Patrick C. ; Das, Ritipurna
刊名	ECONOMIC GEOLOGY
	2015
关键词	FLOOR HYDROTHERMAL SYSTEMS EAST PACIFIC RISE SULFATE REDUCTION INDEPENDENT FRACTIONATION ATMOSPHERIC SULFUR FLUIDS 21-DEGREES-N GEOCHEMISTRY CONSTRAINTS EVOLUTION
DOI	10.2113/econgeo.110.6.1411
英文摘要	We report sensitive high mass resolution ion microprobe, stable isotopes (SHRIMP SI) multiple sulfur isotope analyses (S-32, S-33, S-34) to constrain the sources of sulfur in three Archean VMS deposits Teutonic Bore, Bentley, and Jaguar from the Teutonic Bore volcanic complex of the Yilgarn Craton, Western Australia, together with sedimentary pyrites from associated black shales and interpillow pyrites. The pyrites from VMS mineralization are dominated by mantle sulfur but include a small amount of slightly negative mass-independent fractionation (MIF) anomalies, whereas sulfur from the pyrites in the sedimentary rocks has pronounced positive MIF, with Delta S-33 values that lie between 0.19 and 6.20 parts per thousand (with one outlier at 1.62 parts per thousand). The wall rocks to the mineralization include sedimentary rocks that have contributed no detectable positive MIF sulfur to the VMS deposits, which is difficult to reconcile with the leaching model for the formation of these deposits. The sulfur isotope data are best explained by mixing between sulfur derived from a magmatic-hydrothermal fluid and seawater sulfur as represented by the interpillow pyrites. The massive sulfide lens pyrites have a weighted mean Delta S-33 value of -0.27 +/- 0.05 parts per thousand (MSWD = 1.6) nearly identical with -0.31 +/- 0.08 parts per thousand (MSWD = 2.4) for pyrites from the stringer zone, which requires mixing to have occurred below the sea floor. We employed a two component mixing model to estimate the contribution of seawater sulfur to the total sulfur budget of the two Teutonic Bore volcanic complex VMS deposits. The results are 15 to 18% for both Teutonic Bore and Bentley, much higher than the 3% obtained by Jamieson et al. (2013) for the giant Kidd Creek deposit. Similar calculations, carried out for other Neoarchean VMS deposits give value between 2% and 30%, which are similar to modern hydrothermal VMS deposits. We suggest that multiple sulfur isotope analyses may be used to predict the size of Archean VMS deposits and to provide a vector to ore deposit but further studies are needed to test these suggestions.; ARC Linkage Project [LP110200747]; NSFC [41121062]; SCI(E); EI; ARTICLE; Ian.Campbell@anu.edu.au; 6; 1411-1423; 110
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/424758]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Chen, Mimi,Campbell, Ian H.,Xue, Yunxing,et al. Multiple Sulfur Isotope Analyses Support a Magmatic Model for the Volcanogenic Massive Sulfide Deposits of the Teutonic Bore Volcanic Complex, Yilgarn Craton, Western Australian[J]. ECONOMIC GEOLOGY,2015.
APA	Chen, Mimi.,Campbell, Ian H..,Xue, Yunxing.,Tian, Wei.,Ireland, Trevor R..,...&Das, Ritipurna.(2015).Multiple Sulfur Isotope Analyses Support a Magmatic Model for the Volcanogenic Massive Sulfide Deposits of the Teutonic Bore Volcanic Complex, Yilgarn Craton, Western Australian.ECONOMIC GEOLOGY.
MLA	Chen, Mimi,et al."Multiple Sulfur Isotope Analyses Support a Magmatic Model for the Volcanogenic Massive Sulfide Deposits of the Teutonic Bore Volcanic Complex, Yilgarn Craton, Western Australian".ECONOMIC GEOLOGY (2015).