Analytical Sample Bundle Metadata

2011

GSC Izok Lake bedrock MMSIM counts

Type: lab data



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Bundle Description

A split of 22 bedrock samples was shipped to Overburden Drilling Management Limited (ODM), Ottawa for processing and production of heavy mineral concentrates.  Bedrock samples were first examined under a binocular microscope and described by ODM.  Samples were then processed such that the most mineralized samples were processed last to limit carry over of ore minerals between samples.

Each bedrock sample was disaggregated at ODM using a custom built CNT Spark-2 electric pulse disaggregator (EPD) instead of a conventional rock crusher to preserve natural grain sizes, texures and shapes.  The volume of material disaggregated ranged from 40 to 650 g.  A sample was placed in a metal chamber that was then filled with water and sealed. The rapid scattering of electric pulses through the sample leads to explosions, which occur preferentially along grain boundaries, the natural zones of weakness in a rock sample. The explosions along grain boundaries result in liberated individual, undamaged mineral grains that are recovered in their original shape and form regardless of grain size (Rudashevski et al., 2002; Lastra et al., 2003; Cabri et al., 2008).  The <2.0 mm material of each bedrock sample was then processed at ODM to produce a non-ferromagnetic heavy mineral concentrate for picking indicator minerals.  The <2.0 mm material was passed over a shaking table and the heavy table concentrate recovered and micro panned to recover gold and sulphides in the <0.25 mm fraction.  The minerals in the panned concentrates were counted and their size and shape characteristics recorded and then returned to the sample. The heavy table concentrate was then sieved at 0.18 mm.  The 0.18 to 2.0 mm pre-concentrate was then further refined using heavy liquid separation in methylene iodide diluted to a specific gravity (SG) of 3.2.

The ferromagnetic fraction, including magnetite and pyrrhotite, was then separated using a hand magnet.  The non-ferromagnetic heavy mineral fraction was sieved into four size fractions: 0.18-0.25, 0.25-0.5, 0.5-1.0, 1.0-2.0 mm.  The 0.18-0.25 mm fraction was archived and the 0.25-0.5 mm fraction was further subjected to paramagnetic separations using a Carpco® magnetic separator at 0.6, 0.8 and 1.0 amps to assist picking this fine-grained fraction.  Four quartz blank bedrock samples were inserted into the batch prior to processing at the beginning, part way through the batch, and at the end of the batch to monitor cross contamination between samples: QBK-1, QBK-2, QBK-3, QBK-4.

The samples were picked for MMSIMS, but not KIMs.

Sample Classification (Analytical)

IndexSample CountSurveySample TypePrep Lab MaterialControl RefUnknown SourceDuplicates count
   Unknown Unspecified No  Yes 
   Control Reference Unspecified Yes  No 
21  Till and lithogeochemical survey, NTS 86H/10, Izok Lake area, Nunavut and Northwest Territories, 2009-2010. (more) Whole EPD + HMC separation No  No 

Analytical Package Description

Laboratory: Overburden Drilling Management, Ottawa, Ontario (ODM)

Name: ODM EPD and KIM + MMSIM picking (more)

Overburden Drilling Management

Rock samples are disaggregated by electric-pulse disaggregation.  The resultant samples are processed to obtain the heavy mineral concentrate.  The concentrate is picked for a variety of minerals, including KIMs, MMSIMs, hematite and pyrrhotite.  The samples are also panned for < 0.25 mm gold grains.

Analytical Suites:

IndexName
1  ODM electric-pulse disaggregation
2  ODM HMC separation of disaggregated bedrock samples
3  ODM HMC separation of <0.18mm size fraction
4  ODM HMC paramagnetic separation
5  ODM VG count
6  ODM – calculated gold concentrations
7  ODM MMSIM picked grain counts ( HMC 0.25-0.5 mm fraction )
8  ODM MMSIM picked grain counts ( HMC 0.5-1.0 mm fraction )
9  ODM MMSIM picked grain counts ( HMC 1.0-2.0 mm fraction )
10  ODM MMSIM grain counts
11  ODM hematite grain counts
12  ODM pyrrhotite grain counts

Analytical Methods:

IndexColumn NameSuite OrderMethod OrderSuite RepeatQuantityUnitsDetermination Limit
1  Wt_Recvd    Wt  grams  
2  Wt_Archive    Wt  grams  
3  Wt_EPD    Wt  grams  
4  Wt_post_EPD    Wt  grams  
5  Wt_EPD_gt_2    Wt  grams  
6  Wt_EPD_lt_2    Wt  grams  
7  Wt_lt_2mm    Wt  grams  
8  Wt_Fn_Sieve    Wt  grams  
9  Wt_gt_018    Wt  grams  
10  Wt_HvLq_Lgt    Wt  grams  
11  Wt_HvLq_Mag    Wt  grams  
12  Wt_NM_Tot    Wt  grams  
13  Wt_NM_Split    Wt  grams  
14  Wt_NM_lt_018_wash    Wt  grams  
15  Wt_NM_018_025    Wt  grams  
16  Wt_NM_025_050  10    Wt  grams  
17  Wt_NM_050_100  11    Wt  grams  
18  Wt_NM_100_200  12    Wt  grams  
19  Wt_lt_018_tot    Wt  grams  
20  Wt_lt_018_lgt    Wt  grams  
21  Wt_lt_018_hvy    Wt  grams  
22  Wt_lt_018_hvy_mag    Wt  grams  
23  Wt_lt_018_hvy_nm    Wt  grams  
24  Wt_06A    Wt  grams  
25  Wt_08A    Wt  grams  
26  Wt_10A    Wt  grams  
27  Wt_gt_1A_Lgt    Wt  grams  
28  Wt_gt_1A_Hvy    Wt  grams  
29  VG_tot    VG Tot  count  
30  VG_reshaped    VG Reshaped  count  
31  VG_modif    VG Modified  count  
32  VG_pristin    VG Pristine  count  
33  VG_HMC_Wt    Wt  grams  
34  VG_tot_ppb    Au  ppb  
35  VG_reshaped_ppb    Au  ppb  
36  VG_modif_ppb    Au  ppb  
37  VG_pristin_ppb    Au  ppb  
38  Pck_alm_1    Alm  count  
39  Pck_ant_1    Ant  count  
40  Pck_and_1    And  count  
41  Pck_adr_1    Adr  count  
42  Pck_ap_1    Ap  count  
43  Pck_apy_1    Apy  count  
44  Pck_aug_1    Aug  count  
45  Pck_ccp_1    Ccp  count  
46  Pck_chl_1    Chl  count  
47  Pck_chr_1  10    Chr  count  
48  Pck_crn_1  11    Crn  count  
49  Pck_di_1  12    Di  count  
50  Pck_fac_1  13    Fac  count  
51  Pck_ghn_1  14    Ghn  count  
52  Pck_gn_1  15    Gn  count  
53  Pck_gru_1  16    Gru  count  
54  Pck_hd_1  17    Hd  count  
55  Pck_lo_1  18    Lo  count  
56  Pck_Mn_ax_1  19    Mn_Ax  count  
57  Pck_Mn_alm_1  20    Mn_Alm  count  
58  Pck_Mn_ep_1  21    Mn_Ep  count  
59  Pck_mol_1  22    Mol  count  
60  Pck_mnz_1  23    Mnz  count  
61  Pck_pl_1  24    Pl  count  
62  Pck_pmp_1  25    Pmp  count  
63  Pck_py_1  26    Py  count  
64  Pck_rt_1  27    Rt  count  
65  Pck_suz_1  28    Suz  count  
66  Pck_sps_1  29    Sps  count  
67  Pck_sp_1  30    Sp  count  
68  Pck_spl_1  31    Spl  count  
69  Pck_st_1  32    St  count  
70  Pck_steel_1  33    Steel  count  
71  Pck_tur_1  34    Tur  count  
72  Pck_zo_1  35    Zo  count  
73  Pck_alm_2    Alm  count  
74  Pck_ant_2    Ant  count  
75  Pck_and_2    And  count  
76  Pck_adr_2    Adr  count  
77  Pck_ap_2    Ap  count  
78  Pck_apy_2    Apy  count  
79  Pck_aug_2    Aug  count  
80  Pck_ccp_2    Ccp  count  
81  Pck_chl_2    Chl  count  
82  Pck_chr_2  10    Chr  count  
83  Pck_crn_2  11    Crn  count  
84  Pck_di_2  12    Di  count  
85  Pck_fac_2  13    Fac  count  
86  Pck_ghn_2  14    Ghn  count  
87  Pck_gn_2  15    Gn  count  
88  Pck_gru_2  16    Gru  count  
89  Pck_hd_2  17    Hd  count  
90  Pck_lo_2  18    Lo  count  
91  Pck_Mn_ax_2  19    Mn_Ax  count  
92  Pck_Mn_alm_2  20    Mn_Alm  count  
93  Pck_Mn_ep_2  21    Mn_Ep  count  
94  Pck_mol_2  22    Mol  count  
95  Pck_mnz_2  23    Mnz  count  
96  Pck_pl_2  24    Pl  count  
97  Pck_pmp_2  25    Pmp  count  
98  Pck_py_2  26    Py  count  
99  Pck_rt_2  27    Rt  count  
100  Pck_suz_2  28    Suz  count  
101  Pck_sps_2  29    Sps  count  
102  Pck_sp_2  30    Sp  count  
103  Pck_spl_2  31    Spl  count  
104  Pck_st_2  32    St  count  
105  Pck_steel_2  33    Steel  count  
106  Pck_tur_2  34    Tur  count  
107  Pck_zo_2  35    Zo  count  
108  Pck_alm_3    Alm  count  
109  Pck_ant_3    Ant  count  
110  Pck_and_3    And  count  
111  Pck_adr_3    Adr  count  
112  Pck_ap_3    Ap  count  
113  Pck_apy_3    Apy  count  
114  Pck_aug_3    Aug  count  
115  Pck_ccp_3    Ccp  count  
116  Pck_chl_3    Chl  count  
117  Pck_chr_3  10    Chr  count  
118  Pck_crn_3  11    Crn  count  
119  Pck_di_3  12    Di  count  
120  Pck_fac_3  13    Fac  count  
121  Pck_ghn_3  14    Ghn  count  
122  Pck_gn_3  15    Gn  count  
123  Pck_gru_3  16    Gru  count  
124  Pck_hd_3  17    Hd  count  
125  Pck_lo_3  18    Lo  count  
126  Pck_Mn_ax_3  19    Mn_Ax  count  
127  Pck_Mn_alm_3  20    Mn_Alm  count  
128  Pck_Mn_ep_3  21    Mn_Ep  count  
129  Pck_mol_3  22    Mol  count  
130  Pck_mnz_3  23    Mnz  count  
131  Pck_pl_3  24    Pl  count  
132  Pck_pmp_3  25    Pmp  count  
133  Pck_py_3  26    Py  count  
134  Pck_rt_3  27    Rt  count  
135  Pck_suz_3  28    Suz  count  
136  Pck_sps_3  29    Sps  count  
137  Pck_sp_3  30    Sp  count  
138  Pck_spl_3  31    Spl  count  
139  Pck_st_3  32    St  count  
140  Pck_steel_3  33    Steel  count  
141  Pck_tur_3  34    Tur  count  
142  Pck_zo_3  35    Zo  count  
143  Ccp_Pct  10    Ccp  percent  
144  Ccp_Count  10    Ccp  count  
145  Mol_Pct  10    Mol  percent  
146  Mol_Count  10    Mol  count  
147  Sp_Pct  10    Sp  percent  
148  Sp_Count  10    Sp  count  
149  Gn_Pct  10    Gn  percent  
150  Gn_Count  10    Gn  count  
151  Apy_Pct  10    Apy  percent  
152  Apy_Count  10  10    Apy  count  
153  Lo_Pct  10  11    Lo  percent  
154  Lo_Count  10  12    Lo  count  
155  Py_Pct  10  13    Py  percent  
156  Py_Count  10  14    Py  count  
157  Po_Pct  10  15    Po  percent  
158  Po_Count  10  16    Po  count  
159  Gth_Pct  10  17    Gth  percent  
160  Gth_Count  10  18    Gth  count  
161  Ghn_Pct  10  19    Ghn  percent  
162  Ghn_Count  10  20    Ghn  count  
163  Spl_Pct  10  21    Spl  percent  
164  Spl_Count  10  22    Spl  count  
165  Di_Pct  10  23    Di  percent  
166  Di_Count  10  24    Di  count  
167  Mn_Ep_Pct  10  25    Mn_Ep  percent  
168  Mn_Ep_Count  10  26    Mn_Ep  count  
169  Crn_Pct  10  27    Crn  percent  
170  Crn_Count  10  28    Crn  count  
171  Mn_Ax_Pct  10  29    Mn_Ax  percent  
172  Mn_Ax_Count  10  30    Mn_Ax  count  
173  Rt_Pct  10  31    Rt  percent  
174  Rt_Count  10  32    Rt  count  
175  Ky_Pct  10  33    Ky  percent  
176  Ky_Count  10  34    Ky  count  
177  Sil_Pct  10  35    Sil  percent  
178  Sil_Count  10  36    Sil  count  
179  Tur_Pct  10  37    Tur  percent  
180  Tur_Count  10  38    Tur  count  
181  St_Pct  10  39    St  percent  
182  St_Count  10  40    St  count  
183  Sps_Pct  10  41    Sps  percent  
184  Sps_Count  10  42    Sps  count  
185  Ol_Pct  10  43    Ol  percent  
186  Ol_Count  10  44    Ol  count  
187  Opx_Pct  10  45    Opx  percent  
188  Opx_Count  10  46    Opx  count  
189  Chr_Pct  10  47    Chr  percent  
190  Chr_Count  10  48    Chr  count  
191  Ap_Pct  10  49    Ap  percent  
192  Ap_Count  10  50    Ap  count  
193  Mnz_Pct  10  51    Mnz  percent  
194  Mnz_Count  10  52    Mnz  count  
195  Hem_grey  11    Hem_grey  count  
196  Hem_red  11    Hem_red  count  
197  Po  12    Po  count  
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