Geofluids

Research Article

Fluid Dynamics in a Thrust Fault Inferred from Petrology and Geochemistry of Calcite Veins: An Example from the Southern Pyrenees

Table 1

δ¹⁸O, δ¹³C, and ⁸⁷Sr/⁸⁶Sr isotopic signature of the calcite cements, fault rocks, and host rocks. The , δ₁₈O_fluid, and precipitation temperatures obtained from clumped isotopes are also included. Fw means footwall and Hw means hanging wall.


Sample	Fracture	Cement	δ¹⁸O ‰VPDB	δ¹³C ‰VPDB	⁸⁷Sr/⁸⁶Sr		δ₁₈O_fluid ‰VSMOW	(°C)

Bx1B	F2	Cc1	-8.2	-1.7	0.707707	0.619/0.642	-1.8 to -0.1	42 to 51
Bx 3	F1	Cc1	-7.3	-1.8
Bx36.I	Breccia (Fw)	Cc1	-7.6	-2
Bx36.IV	Breccia (Fw)	Cc1	-7.4	-1.6
Bx36.V	Breccia (Fw)	Cc1	-6.5	-1.5
Bx3.III	F1	Cc2	-8.2	-3.7
Bx1A.I	F2	Cc2	-7	-4.6	0.707699	0.562/0.589	+3.7 to +5.9	64 to 78
Bx1B.II	F2	Cc2	-6.3	-4.6
Bx3.II	F1	Cc2	-7	-3.3
Bx36.II	Breccia (Fw)	Cc2	-7.8	-5.6	0.707695
Bx36.III	Breccia (Fw)	Cc2	-7.2	-6.3
Bx35	F2	Cc2	-5.4	-4	0.707765
Bx1A.II	F3	Cc3	-13	-1.9
Bx2A	F3	Cc3	-12.1	-2.9	0.707698	0.498/0.515	+3.2 to +5.5	105 to 117
Bx2B	F3	Cc3	-11.9	-2.8
Bx4	F3	Cc3	-11.7	-3.2
Bx5	Thrust plane	Cc4	-12.9	+0.4	0.707771	0.53/0.535	+0.7 to +1.9	93 to 96
Bx6	Breccia (Hw)	Cc4	-12.3	+2.4
Bx7.I	Breccia (Hw)	Cc4	-13.1	+0.4	0.707715
Bx7.II	Breccia (Hw)	Cc4	-11.9	+0.9
Bx 8	Breccia (Hw)	Cc4	-12.3	-0.6
Bx66.C	Slip plane	Cc4	-12	+1.6
Bx1.HR	Host rock (Fw)	Cc0	-7.2	-0.5
Bx2A.HR	Host rock (Fw)	Cc0	-6.7	+0.7	0.707606
Bx3.HR	Host rock (Fw)	Cc0	-7	+0.1
Bx7	Host rock (Hw)		-5.8	+2.2
Bx8	Host rock (Hw)		-6.2	+2.1	0.707718
Bx6.I	Fault rock (matrix)		-6.9	+2.9
Bx6.II	Fault rock (matrix)		-7.1	+3
Bx66	Fault rock (matrix)		-6.6	+2.6
Bx67	Fault rock (matrix)		-6	+2.3