Dynamic Permeability Related to Greisenization Reactions in Sn-W Ore Deposits: Quantitative Petrophysical and Experimental Evidence

Table 2

Rock petrophysical properties measured in samples of granite, greisenized granite, and greisen from Panasqueira. AI corresponds to the chemical alteration index defined in Section 4.3.

	Location	AI	(g.cm^-3)	(%)	(m^2)	(m^2)
Granite
E2	SCB2	61.9	2.68	0.54
D3	SCB2	62.2	2.66	0.59	-	-
D1	SCB2	62.1	2.69	0.6	-	-
D2	SCB2	64.3	2.69	0.70	-	-
D4	SCB2	62.6	2.68	0.71	-
Greisenized granite
C1	SCB2	66.4	2.70	1.08
O4	SCB2	66.1	2.72	0.99	-	-
P3D	Mine	67.0	2.71	1.37	-	-
P3C	Mine	68.1	2.76	1.8
P3E	Mine	66.9	2.75	1.53	-	-
O1	SCB2	68.6	2.72	1.64	-	-
O3	SCB2	66.1	2.73	1.58	-	-
O5	SCB2	70.3	2.73	3.26
P4-2	Mine	72.3	2.79	3.34	-	-
P4-3	Mine	69.8	2.73	2.04	-	-
P4-4	Mine	71.4	2.73	2.04	-	-
Greisen
B2	SCB2	72.9	2.9	5.91
B1	SCB2	72.8	2.87	5.86	-	-
P57-A	Mine	73.9	2.93	8.97	-	-
Host rock (Beira schist)
A1	SCB2	-	-	-	-