Geofluids

Research Article

Understanding Fluid Flow during Tectonic Reactivation: An Example from the Flamborough Head Chalk Outcrop (UK)

Table 2

Data from clumped isotopes analyses.


	δ¹³C (, VPDB)	δ¹⁸O (, VPDB)	Δ₄₇ (, CDES)	Av. Δ₄₇ (, CDES)	±1 S.D. ()	(°C)	(SMOW)

Sample Group I	2.54		0.582
	2.56		0.581	0.588	0.012
	2.54		0.602

Sample Group II	2.61		0.595
	2.47		0.601	0.597	0.004
	2.60		0.594

Sample Group III	0.75		0.577
	0.81		0.596	0.579	0.016
	0.79		0.565

For each sample the three replicate measurements are averaged and show one standard deviation close to that found for homogeneous carbonate standards (, 1 SD). Uncertainties on temperature estimates are calculated from this external reproducibility or the SD obtained here if higher. Uncertainties on values reflect the variability in and values.