Figure F3 (continued). B. Al and Fe scans comparing the MARUM XRF 3 Avaatech scanner (Bremen; red line) with tube current of 0.12 mA and 20 s live time to the scans from the Gulf Coast Repository (GCR) Avaatech scanner using a tube current of 2 mA and 20 s live time (blue line). The two scanners have different generations of detectors with different sensitivity, but these differences did not appreciably affect the shape of the depth profiles. Top plots in each shows a scatter plot of the individual samples.
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