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TILL-2冰磧土樣品Till Sample

Source
TILL-1, TILL-2, TILL-3 and TILL-4 were collected and characterized in cooperation with the Mineral Resources Division, Minerals and Continental Geoscience Branch, Geological Survey of Canada.
TILL-1 was collected 25 kilometres north-west of Lanark, Ontario; TILL-3 was collected 8 kilometres east of Cobalt, Ontario. These two soil samples were collected from the combined B and C horizons. The two till samples (TILL-2 and TILL-4) were collected near Scission's Brook, New Brunswick. At this location, extensive trenching had been done by the mining company who owned the property in order to expose the till. The company had obtained preliminary analyses of till samples collected at various sites within the trenched areas. These analyses were used as guidelines to sampling. No effort was made to collect any particular horizon. In order to augment the molybdenum levels in TILL-4, a small quantity of a molybdenite-bearing soil was collected near an old test pit. All sampling was done by shovelling.
Description
These four materials, two soils and two tills, complete a series of reference samples of surficial materials which also includes the lake and stream sediment materials, LKSD-1, LKSD-2, LKSD-3, LKSD-4, STSD-1, STSD-2, STSD-3 and STSD-4, which are already available.
Like the sediment series, the TILL samples are characterised for major element oxides, total elements as well as elements from partial extractions. The partial extractions are concentrated hydrochloride - concentrated nitric acids and dilute hydrochloric-dilute nitric acids. In addition, informational data from a single source are provided for a number of elements derived by EPA digestions 3050 and 3051.
Intended use
TILL-1, TILL-2, TILL-3 and TILL-4 are intended for quality control in chemical analysis.
Instructions for use
TILL samples should be used “as is” without drying. The contents of the bottle should be thoroughly mixed before taking samples.
Method of preparation
In each case, the collected material was spread to a depth of 7.5 to 10 cm over a polyethylene sheet and allowed to dry for several weeks at room temperature. When dry, each sample was sieved through an 80-mesh (177 μm) screen. The +80 mesh fraction was discarded. The -80-mesh fraction was ball milled and sieved through a 200-mesh screen (74 μm). The oversize material from this sieving was retained, ball milled and sieved a second time through the 200-mesh screen. At this point, any oversize fraction (plus-200 mesh) was discarded. The two minus-200-mesh fractions were combined and tumbled as a single batch in a conical blender for eight hours. Each material was bottled in 100-g units.
Homogeneity
A method described by Lynch (1) was employed for homogeneity testing. No evidence of inhomogeneity was found.
Certification
TILL-1, TILL-2, TILL-3 and TILL-4 were characterised by an interlaboratory analysis program involving thirty-one laboratories. The provisional values for these soil and till reference materials were assigned from the average of data after a two-step trimming method described by Lynch (1).
Legal notice
The Canadian Certified Reference Materials Project has prepared these reference materials and statistically evaluated the analytical data of the interlaboratory certification program to the best of its ability. The purchaser, by receipt hereof, releases and indemnifies the Canadian Certified Reference Materials Project from and against all liability and costs arising out of the use of these materials and information.
References
(1) J.J. Lynch (1990). "Provisional elemental values for eight new geochemical lake sediment and stream sediment reference materials LKSD-1, LKSD-2, LKSD-3, LKSD-4, STSD-1, STSD-2, STSD-3 and STSD-4", Geostandards Newsletter, 14: 153-167. 
Material collection locations
Sample NTS* Designation Location
TILL-1 31F Joe Lake, Ontario
TILL-2 21C 5 km West Scisson's Brook,
New Brunswick
TILL-3 31M O'Brien Mine, near Cobalt, Ontario
TILL-4 21C Scisson's Brook, New Brunswick
31G Molybdenite Occurrence near
Hull, Quebec
Summary of major and minor elements
expressed as oxides (%)
  TILL-1 TILL-2 TILL-3 TILL-4
SiO2 60.9 60.8 69.1 65.0
Al2O3 13.7 16.0 12.2 14.4
Fe2O3(T) 6.82 5.39 3.92 5.63
MgO 2.15 1.83 1.71 1.26
CaO 2.72 1.27 2.63 1.25
Na2O 2.71 2.19 2.64 2.46
K2O 2.22 3.07 2.42 3.25
MnO 0.18 0.10 0.06 0.06
TiO2 0.98 0.88 0.49 0.81
P2O5 0.22 0.17 0.11 0.20
LOI (1000°C) 7.3 8.1 4.6 5.7
Sum 99.90 99.80 99.88 100.02
Summary of "total" elements in TILL series
(in μg/g unless otherwise noted)
  TILL-1 TILL-2 TILL-3 TILL-4
As 18 26 87 111
Au (ppb) 13 2 6 5
Ba 702 540 489 395
Be 2.4 4.0 2.0 3.7
Bi <5 <5 <5 40
Br 6.4 12.2 4.5 8.6
Ce 71 98 42 78
Co 18 15 15 8
Cr 65 74 123 53
Cs 1.0 12. 1.7 12
Cu 47 150 22 237
Eu 1.3 1.0 <1.0 <1.0
Er 3.6 3.7 1.4 3.2
Fe (%) 4.81 3.84 2.78 3.97
Hf 13 11 8 10
La 28 44 21 41
Li 15 47 21 30
LOI (500°C) % 6.3 6.8 3.6 4.4
Lu 0.6 0.6 0.2 0.5
Mn 1420 780 520 490
Mo 2 14 2 16
Nb 10 20 7 15
Nd 26 36 16 30
Ni 24 32 39 17
P 930 750 490 880
Pb 22 31 26 50
Rb 44 143 55 161
S (%) <0.05 <0.05 <0.05 0.08
Sb 7.8 0.8 0.9 1.0
Sc 13 12 10 10
Sm 5.9 7.4 3.3 6.1
Sr 291 144 300 109
Ta 0.7 1.9 <0.5 1.6
Tb 1.1 1.2 <0.5 1.1
Th 5.6 18.4 4.6 17.4
Ti 5990 5300 2910 4840
U 2.2 5.7 2.1 5.0
V 99 77 62 67
W <1 5 <1 204
Y 38 40 17 33
Yb 3.9 3.7 1.5 3.4
Zn 98 130 56 70
Zr 502 390 230 385
 

 

Summary of partial extraction elements;
concentrated HNO3 - concentrated HCl
(in μg/g unless otherwise noted)
  TILL-1 TILL-2 TILL-3 TILL-4
Ag 0.2 0.2 1.6 <0.2
As 13 22 84 102
Ba 84 95 43 71
Bi <3 4 <3 44
Cd <0.2 0.3 <0.2 <0.2
Co 12 13 11 6
Cr 30 40 73 26
Cu 48 149 23 254
Fe (%) 3.1 3.2 2.0 3.3
Hg (ppb) 92 74 107 39
Mn 950 530 310 260
Mo <2 11 <2 14
Ni 18 31 32 15
Pb 12 21 16 36
V 48 38 33 38
Zn 70 116 43 63
Summary partial extraction elements;
dilute HNO3 - dilute HCl
(in μg/g unless otherwise noted)
  TILL-1 TILL-2 TILL-3 TILL-4
Ag <0.2 <0.2 1.4 <0.2
Co 12 12 10 6
Cu 49 152 23 252
Fe (%) 3.4 3.4 2.2 3.5
Mn 1020 570 310 260
Mo 1 13 1 15
Ni 17 30 32 14
Pb 14 24 17 37
Zn 71 116 43 62
Single source data by EPA 3050 digestion -
ICP-AES analysis (all values in μg/g)
Element TILL-1 TILL-2 TILL-3 TILL-4
Al 18883 32600 10750 25200
Ba 84.3 104.6 46.4 75.1
Be 1.1 2.1 0.8 1.6
Cd <0.33 <0.33 <0.33 <0.33
Ca 4145 1940 6240 1438
Cr 29.3 39.3 66.7 25.8
Co 11.7 12.5 10.2 5.8
Cu 44.0 162 17.6 266
Fe 29167 33967 19900 32533
Pb 24.0 35.7 24.0 50.0
Mg 6250 7547 6510 5470
Mn 1060 601 294 243
Mo 8.7 18.7 5.0 20.7
Ni 14.0 27.5 28.0 11.0
P 915 856 470 1150
K 1188 4355 1220 3915
Na 530 527 336 313
V 89 107.2 71.6 82.9
Zn 65.2 111.0 42.5 59.0
Single source data by EPA 3051 digestion -
ICP-AES analysis (all values in μg/g)
Element TILL-1 TILL-2 TILL-3 TILL-4
Al 18050 27550 12000 20400
Ba 77.8 60.8 49.2 102
Be <0.2 1.7 <0.2 <0.2
Cd <0.35 <0.3 <0.35 <0.3
Ca 3817 1640 5660 1565
Cr 29.3 34.7 64.7 24.3
Co 12.3 15.5 14.8 8.1
Cu 44.8 176 16.5 332
Fe 37900 38600 21000 40500
Pb <10.0 31.5 23 42
Mg 6990 8525 7445 5570
Mn 1060 588 317 280
Mo <2.5 <1.7 6.0 22.5
Ni 18.7 29.5 26.5 11.0
P 834 540 457 1260
K 640 3370 964 3115
Na 575 450 427 485
V 70 111.2 66.1 88.0
Zn 69.8 112.7 42.7 57.6
APPENDIX for CCRMP Reference Materials LKSD, STSD, and TILL 
Explanation of Extraction Methods 
The provisional values for the lake, stream and till reference materials (LKSD, STSD and TILL) were determined from the results of numerous laboratories involved in geochemical exploration using their existing routine methods. Two main types of methods were used.
The first type can be termed total methods wherein the complete amount of a particular element is determined. One subgroup of these total methods involves the sample being analyzed without pretreatment i.e., instrumental neutron activation and powder x ray diffraction. Another subgroup of total methods includes pretreatments such as a multi acid dissolution with hydrofluoric acid, or fusions followed by, for example, an instrumental finish. This second group of methods may be used to determine the total concentration of numerous elements, but losses of some other elements may occur.
A second type of techniques involves a partial dissolution or extraction of the elements using different combinations of acids at varying strengths. The laboratories that submitted data did not follow established protocols with regards to either the types or amounts of acid utilized. However, two main subgroups of partial extraction or partial dissolution techniques were chosen. The first of these involves the use of both diluted nitric and hydrochloric acids i.e., 2 mL of nitric acid, 1 mL of hydrochloric acid and 5 mL of water; or 3 mL, 2 mL and 1 mL of each component, respectively; or 3 mL, 1 mL and 4 mL of each component, respectively. The second subgroup involves the use of varying amounts of these two acids without the addition of any water i.e., 3 mL of hydrochloric acid plus 1 mL of nitric acid, or 3 mL of nitric acid plus 1 mL of hydrochloric acid. For both of these two subgroups, the sample and acid mixture were heated from 2 to 4 hours at 95°C to 100°C, cooled, diluted to volume and analyzed.