云母具有较高Rb/Sr比值, 且Rb-Sr同位素体系在该矿物中的封闭温度高于中、低温矿产的成矿温度, 因此对其进行激光原位微区Rb-Sr等时线定年是解决中、低温热液矿床成矿时代的一个重要途径. 本文利用三重四极杆等离子体质谱仪(ICP-MS/MS)与193nm激光剥蚀系统(LA)联用, 以SF6为反应气体, 实现了同质异位素87Rb+...
Cullen/Frost, less than a 50th the size of Wells Fargo, had trouble getting its computers to work seamlessly with the SBA’s systems, so it marshaled an army of employees to handle forms. Most volunteered and worked from home, where they hopped online in the early morning and worked until...
ftp://ftp.x.org/pub/R6.1/xc/doc/hardcopy/XLFD/xlfd.PS.Z [The official specification of X font descriptors, including font transformation matrices.] Foley, van Dam, Feiner, and Hughes, _Computer Graphics: Principles and Practice_, 2nd ed. Addison-Wesley, 1990, ISBN 0-201-12110-7. [...