Geofluids

Research Article

Structural Controls on Shallow Cenozoic Fluid Flow in the Otago Schist, New Zealand

Table 4

In situ average ⁸⁷Sr/⁸⁶Sr isotope ratios with error and mean square weighted deviation (MSWD) values from the different carbonate types.


Locality	Sample	Lithology	⁸⁷Sr/⁸⁶Sr	±2σ	No.	MSWD

Akatore Creek	AK17-1	Breccia	0.70624	0.00039	2	2.1
	AK17-2	Breccia	0.70639	0.00004	3	0.7
	AK23-1	Breccia	0.70635	0.00006	1	—
	AK23-2	Breccia	0.70692	0.00010	1	—
	AK23-3	Breccia	0.70646	0.00007	1	—
	AK23-4	Breccia	0.70626	0.00005	1	—
	AK23-5	Breccia	0.70598	0.00005	1	—
	AK24	Botryoidal carbonate	0.70633	0.00005	5	2
	AK33-1	Breccia	0.70595	0.00004	2	0.2
	AK33-2	Breccia	0.70604	0.00003	3	0.74
	AK34-1	Fibrous vein	0.70630	0.00047	2	2.5
	AK34-2	Fibrous vein	0.70608	0.00007	4	2.1
	AK40	Fibrous vein	0.70588	0.00008	5	3.2
	AK42-1	Quartz-calcite vein	0.70577	0.00037	2	2.1
	AK42-2	Quartz-calcite vein	0.70588	0.00004	3	0.29

Bruce rocks	BR2.E2A-1	Botryoidal carbonate	0.70579	0.00005	8	2.6
	BR2.E2A-2	Siderite	0.70624	0.00011	2	0.25
	BR2.E2B-1	Fibrous vein	0.70641	0.00008	2	1.5
	BR2.E2B-2	Fibrous vein	0.70606	0.00004	2	0.28
	BR2.E2C-1	Fibrous vein	0.70596	0.00009	1	—
	BR2.E2C-2	Fibrous vein	0.70624	0.00005	3	1.9
	BR6.A-1	Breccia	0.70593	0.00007	3	1.1
	BR6.A-2	Breccia	0.70618	0.00059	3	0.98
	BR6.B	Quartz-calcite vein	0.70614	0.00009	6	6.3