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Background Of Acient Mining And Tools Used Litmosphere And Mineral Distribution

Given the acceptable MSWD of 1.5 we use the errorweighted mean of 266 177 1 Ma n 55 as the best estimate for the minimum age of this sample. The ircon Hf i ranges from 3.2 to 0.7 with a unimodal distribution and a mean of 0.6 177 1.7 2SD . Only one ircon within this sample yielded a concordant U

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