四川马脑壳层控金矿床中辉锑矿残余沉积组构的发现及其成因意义
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摘要
在川西北马脑壳层控 Au- Sb- W建造矿床中 ,发现了辉锑矿的显微沉积层纹状组构。由细晶辉锑矿和自生石英交替互层所显示的方向与辉锑矿的粒内变形作用以及晶体粒度变化所显示的方向一致 ,也与矿石和围岩的宏观 -微观层理一致。这一组构代表了一种保留有沉积成因先存组构残余的次生组构
The syngenetic fine laminated fabric of stibnite was recognized in the Manaoke stratabound Au W Sb deposit. The direction shown by the interbedded fine crystalline stibnite and authigenic quartz coincides with the direction shown by the intragranular deformation and change of grain size of stibnite. It is also in agreement with macroscopic and microscopic stratifications of ores and host rocks. This fabric is interpreted as a secondary fabric representing the relict predecessor fabrics of synsedimentary origin.
The syngenetic fine laminated fabric of stibnite was recognized in the Manaoke stratabound Au W Sb deposit. The direction shown by the interbedded fine crystalline stibnite and authigenic quartz coincides with the direction shown by the intragranular deformation and change of grain size of stibnite. It is also in agreement with macroscopic and microscopic stratifications of ores and host rocks. This fabric is interpreted as a secondary fabric representing the relict predecessor fabrics of synsedimentary origin.
引文
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[2 ]郑明华 ,周渝峰 ,刘建明 ,等 .喷流型与浊流型层控金矿床 [M].成都 :四川科学技术出版社 ,1 994.1 - 1 73.
[3]Gu X X.Geology,geochemistry and genesis of theMiddle- Upper Triassic sediment- hosted gold deposits inNW- Sichuan,China[D].University of Innsbruck,Austria,1 994.
[4]Gu X X.Geochemical characteristics of the TriassicTethys- turbidites in northwestern Sichuan,China:Implications for provenance and interpretation of thetectonic setting[J].Geochimica et Cosmochimica Acta,1 994,58(2 1 ) :461 5- 4631 .
[5]郑明华 ,周渝峰 ,付仁平 ,等 .四川西北部马脑壳层控金矿床中白钨矿矿体的发现及其意义 [J].科学通报 ,1 993,38(7) :642 - 644.
[6]Zheng M H,Liu J M,Schulz O,et al.Schichtgebundene Goldlagerstatten in kambrischen undtriassischen Gesteinen in NW- Sichuan (China) [M ].Vienna:Arch f L agerst Forsch,Geol B- A Band 1 5,1 993.1 - 1 52 .
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