Cleaning Rod HI-7 ,The cleaning rod is part of an injection holder, and it is used to clean the inside of the injection holder. This issue discusses the cleaning rod.

Already thirty years ago Dr.Marshall has built and sold Cathodoluminescence (CL) equipment in the U.S.A. and Great Britain. I was among the first who be-came interested in CL research for minerals and gemstones in Austria and bought such an instrument 1984. Then, it was called “Luminoscope”. Today it is named ”Reliotron”. To investigate minerals, I had to use a large compartment that could house samples up to 6 x 3.5 x 3 cm placed on an easily moveable sledge. This instrument I have still in use and it is in good working order.

Detailed characterization of diagenetic fluid behaviour and evolution is commonly hindered by shortage of appropriate and economic methods to carry out in situ analysis in the tiny diagenetic mineral crystals. Using micromill sampling method, this study presents in situ stable isotopic data for the growth zones of saddle dolomite crystals in the hydrothermally-altered dolostones of Upper Cambrian (Furongian) at Keping, Tarim Basin, NW China. These data show minor and large variations in δ13C (−0.7‰ to −1.5‰ VPDB) and δ18O (−8.3‰ to −13.8‰ VPDB), respectively, from the cores to outer rims of the dolomite crystals and suggest that saddle dolomites precipitated from dolomitizing fluids with similar carbon sources but oscillatory temperatures during different formation stages. This scenario is confirmed by microthermometry of fluid inclusions within the growth zones of dolomite crystals. This study indicates that in situ isotope analysis could provide more detailed information related to the source and pathway of dolomitizing fluids, facilitating better characterization of dolomitizing fluids and processes.

Detailed characterization of diagenetic fluid behaviour and evolution is commonly hindered by shortage of appropriate and eco- nomic methods to carry out in situ analysis in the tiny diagenet ic mineral crystals. Using micromill sampling method, this study presents in situ stable isotopic data for the growth zones of saddle dolomite crystals in the hydrothermally-altered dolostones of Upper Cambrian (Furongian) at Keping, Tarim Basin, NW China. These data show minor and large variations in δ 13 C (− 0.7‰ to − 1.5‰ VPDB) and δ 18 O (−8.3‰ to − 13.8‰ VPDB), respectively, from the cores to outer rims of the dolomite crystals and sug- gest that saddle dolomites precipitated from dolomitizing fluids with similar carbon sources but oscillatory temperatures during different formation stages. This scenario is confirmed by microthe rmometry of fluid inclusions within the growth zones of dolo- mite crystals. This study indicates that in situ isotope analysis could provide more deta iled information related to the source and pathway of dolomitizing fluids, facilitating better characterization of dolomitizing fluids and processes.

RELIONⅢCL阴极发光仪拍摄矿物的照片 CLandTrLphotosofcalciteveinsin volcaniclasticrocksofCariblancoFormation, PuertoRico.ProvidedbyRubenUribe,U.ofIowa 火山碎屑岩中的方解石的CL图像