摘要
绢云母是胶东西北部金矿的主要蚀变矿物。短波红外光谱测量可以提供云母类AlOH波长、结晶度、云母(蚀变)强度、云母层间水强度等参数,这些参数可以用来研究蚀变特征、预测金矿化。为确定招平断裂带内已知金矿化的蚀变矿物特征,为在区域上寻找类似特征地段提供类比依据,在台上特大型金矿上下盘围岩1km之内采集岩石样品,利用便携式红外矿物分析仪(PIMA)进行短波红外光谱测量。结果表明上盘含更多的白云母、具有更高的云母水强度,多硅白云母发育在下盘。高结晶度的云母和更多的多硅白云母是金矿化的指示。
Sericite is a main alteration mineral of gold deposits in the northwestern Jiaodong Peninsula. Short wave infrared spectral （SWIR） survey can provide important parameters such as AIOH wave, crystallinity, （alteration） intensity, （interlayered） water intensity of mica. These parameters are useful for studying alteration characteristics and predicting gold mineralization. To describe the alteration characteristics of gold mineralization in the Zhaoping fault, and to provide analogy criteria for delineating gold potential area with similar characteristics, rock samples in both hanging and foot wall of the fault for up to 1,000 meters distant from gold ore zone at Taishang gold deposit were taken. The samples were subject to hyperspectral mineral mapping using PIMA （ portable infrared mineral analyzer）. Hanging wall contains more muscovite, and higher mica interlayer water intensity than footwall. Phengite mainly develops in foot wall. High crystallinity of mica and more phengite are characteristics of gold mineralization zone.
出处
《地质与勘探》
CAS
CSCD
北大核心
2008年第5期58-63,共6页
Geology and Exploration
基金
国家自然科学基金项目(编号:40572063
40172036)资助
