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Migration of Trace Elements in Pyrite From Orogenic Gold Deposits: Evidence From LA‐ICP‐MS Analyses
Author(s) -
ZHANG Kai,
LI Hongyan
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 - 10.1111/1755-6724.12375_79
Subject(s) - beijing , china , pyrite , library science , chinese academy of sciences , citation , zhàng , trace (psycholinguistics) , history , geochemistry , geology , computer science , archaeology , philosophy , linguistics
Pyrite is the most abundant sulfide mineral in the majority of orogenic sulfide ore deposits and gold deposits. Original textures of such deposits are difficult to determine because they are lost or replaced during metamorphism or hydrothermalism. Pyrite is a very refractory mineral, it means pyrite could be an ideal mineral to preserve evidence of evolution history of the deposits. Wet chemical analyses studies to determine trace constituents have provided much information about pyrite composition. However, several limitations must be taken into consideration. For example, it’s difficult to produce pure separates, and difficult to separate grains of different crystal habits. Electron microprobe is the most widely used in-situ microanalytical tool, but limited by relatively high detection limit (~>100ppm). The measurement of trace elements by laser ablation inductivity coupled plasma mass spectrometry(LA-ICP-MS) has advantages of in-situ, realtime, high resolution(5-10μm) and low detection limit (<1ppm) over these traditional methods. However, development of analysis of trace metal elements in sulfide minerals by LA-ICP-MS has been hampered by lack of reference materials of sulfides. In recent years large amount of work have been carried out at the CODES LAICP-MS analytical facility University, Australia, since they developed the calibration standard STDGL2b2 which improves the accuracy of measurement for sulphide by LA-ICP-MS.