An empirical test of sample size and precision of Robin's method of strain analysis

摘要: Abstract Using Robin's method of strain analysis, we attempted to determine empirically how many inclusions must be measured obtain principal ratios that are reproducible within ± 10%. Six large specimens deformed leuco-granite with strained lenticular quartz aggregates were studied from a crescentic pluton in the Grenville Province southeastern Ontario. Between 63 and 177 per specimen face, calculated on basis. sets 100 measurements, ten separate for each sample size 10, 15, 20, … 45 drawn at random data set. Only about 35 need face