This sample belongs to: Sarah George
Aliquot Name: 18AST02
IGSN:
Stratigraphic Formation Name:
Stratigraphic Age:
Rock Type: Sandstone
Mineral: Zircon
Latitude: -130.13
Longitude: 57.79
Internal Uncertainty Level: one sigma
External Uncertainty 206/238 (% two sigma): 0.7
External Uncertainty 206/207 (% two sigma): 0.6
Analysis Purpose:
Laboratory Name: Arizona LaserChron Center
Analyst Name: Daniel Alberts
Aliquot Reference:
Aliquot Instrumental Method: LA-ICPMS
Aliquot Instrumental Reference: Gehrels, G.E., Valencia, V., Ruiz, J., (2008), Enhanced precision, accuracy, efficiency, and spatial resolution of U-Pb ages by laser ablation-multicollector-inductively coupled plasma-mass spectrometry: Geochemistry, Geophysics, Geosystems, v. 9, Q03017, doi:10.1029/2007GC001805.
Aliquot Instrumental Reference:
Analysis Name |
U |
206Pb/204Pb |
U/Th |
206Pb/207Pb |
± (%) |
207Pb/235U |
± (%) |
206Pb/238U |
± (%) |
error corr. |
206Pb/238U Age |
± (Ma) |
207Pb/235U Age |
± (Ma) |
206Pb/207Pb Age |
± (Ma) |
Best age |
± (Ma) |
Conc. |
18AST02 Spot 8 |
6701 |
174012 |
1.6 |
19.8255 |
0.7 |
0.1807 |
1.2 |
0.026 |
1.0 |
0.81 |
165.4 |
1.6 |
168.6 |
1.9 |
214.3 |
16.1 |
165.4 |
1.6 |
98.1 |
18AST02 Spot 16 |
3258 |
18917409 |
2.2 |
19.7967 |
0.8 |
0.1988 |
1.4 |
0.0286 |
1.1 |
0.80 |
181.5 |
2.0 |
184.1 |
2.3 |
217.7 |
18.8 |
181.5 |
2.0 |
98.6 |
18AST02 Spot 29 |
2167 |
146789 |
1.5 |
20.0378 |
0.8 |
0.2022 |
1.5 |
0.0294 |
1.2 |
0.85 |
186.8 |
2.3 |
187.0 |
2.5 |
189.6 |
17.9 |
186.8 |
2.3 |
99.9 |
18AST02 Spot 10 |
494 |
14169 |
2.4 |
20.0972 |
0.9 |
0.2116 |
1.4 |
0.0309 |
1.1 |
0.77 |
195.9 |
2.2 |
194.9 |
2.6 |
182.7 |
21.2 |
195.9 |
2.2 |
100.5 |
18AST02 Spot 5 c3 |
602 |
22705 |
2.3 |
19.8424 |
1.1 |
0.2148 |
1.6 |
0.0309 |
1.1 |
0.71 |
196.3 |
2.1 |
197.5 |
2.8 |
212.3 |
25.4 |
196.3 |
2.1 |
99.4 |
18AST02 Spot 19 |
557 |
24417 |
2.9 |
20.0873 |
0.9 |
0.2171 |
1.9 |
0.0316 |
1.6 |
0.86 |
200.8 |
3.2 |
199.5 |
3.4 |
183.8 |
22.0 |
200.8 |
3.2 |
100.7 |
18AST02 Spot 31 |
4439 |
89142 |
1.5 |
20.0506 |
0.8 |
0.2187 |
1.7 |
0.0318 |
1.4 |
0.87 |
201.9 |
2.9 |
200.8 |
3.0 |
188.1 |
19.2 |
201.9 |
2.9 |
100.5 |
18AST02 Spot 26 |
321 |
13465 |
3.3 |
19.8282 |
1.2 |
0.2224 |
1.7 |
0.032 |
1.3 |
0.74 |
203.0 |
2.6 |
203.9 |
3.2 |
214.0 |
26.7 |
203.0 |
2.6 |
99.6 |
18AST02 Spot 27 |
372 |
14187 |
2.2 |
20.191 |
1.4 |
0.2184 |
1.9 |
0.032 |
1.2 |
0.64 |
203.1 |
2.4 |
200.6 |
3.4 |
171.8 |
33.3 |
203.1 |
2.4 |
101.2 |
18AST02 Spot 33 |
415 |
26540 |
2.9 |
19.7547 |
1.3 |
0.2233 |
1.7 |
0.032 |
1.1 |
0.66 |
203.1 |
2.2 |
204.6 |
3.1 |
222.6 |
29.0 |
203.1 |
2.2 |
99.2 |
18AST02 Spot 20 |
293 |
12275 |
3.3 |
20.4914 |
1.3 |
0.2153 |
1.7 |
0.032 |
1.2 |
0.69 |
203.1 |
2.4 |
198.0 |
3.1 |
137.3 |
29.7 |
203.1 |
2.4 |
102.6 |
18AST02 Spot 13 |
461 |
42351 |
2.6 |
19.9096 |
0.8 |
0.2224 |
1.3 |
0.0321 |
1.0 |
0.77 |
203.9 |
2.0 |
203.9 |
2.4 |
204.5 |
19.5 |
203.9 |
2.0 |
100.0 |
18AST02 Spot 23 |
916 |
310139 |
2.0 |
20.0139 |
0.9 |
0.2215 |
1.4 |
0.0322 |
1.1 |
0.77 |
204.1 |
2.2 |
203.2 |
2.6 |
192.4 |
21.1 |
204.1 |
2.2 |
100.5 |
18AST02 Spot 28 |
494 |
109038 |
2.4 |
19.5443 |
1.1 |
0.2273 |
1.5 |
0.0322 |
1.0 |
0.67 |
204.5 |
2.1 |
207.9 |
2.9 |
247.3 |
26.1 |
204.5 |
2.1 |
98.3 |
18AST02 Spot 17 |
253 |
8500 |
3.6 |
20.213 |
1.4 |
0.2205 |
2.2 |
0.0323 |
1.6 |
0.74 |
205.1 |
3.2 |
202.3 |
3.9 |
169.3 |
33.8 |
205.1 |
3.2 |
101.4 |
18AST02 Spot 12 |
412 |
27173 |
2.8 |
20.3606 |
1.3 |
0.2192 |
1.8 |
0.0324 |
1.3 |
0.70 |
205.5 |
2.6 |
201.3 |
3.3 |
152.3 |
30.7 |
205.5 |
2.6 |
102.1 |
18AST02 Spot 30 |
311 |
21375 |
3.6 |
19.9513 |
1.3 |
0.2242 |
1.6 |
0.0325 |
0.9 |
0.54 |
205.9 |
1.7 |
205.4 |
2.9 |
199.7 |
30.9 |
205.9 |
1.7 |
100.2 |
18AST02 Spot 7 |
405 |
16965 |
2.0 |
20.1795 |
0.9 |
0.2224 |
1.6 |
0.0326 |
1.4 |
0.85 |
206.6 |
2.7 |
203.9 |
3.0 |
173.1 |
20.0 |
206.6 |
2.7 |
101.3 |
18AST02 Spot 9 |
373 |
13189 |
2.9 |
20.4882 |
1.4 |
0.2193 |
1.6 |
0.0326 |
0.9 |
0.54 |
206.8 |
1.8 |
201.3 |
3.0 |
137.6 |
32.4 |
206.8 |
1.8 |
102.7 |
18AST02 Spot 22 |
312 |
35056 |
2.8 |
20.007 |
1.4 |
0.225 |
2.1 |
0.0327 |
1.5 |
0.73 |
207.2 |
3.1 |
206.1 |
3.9 |
193.2 |
33.6 |
207.2 |
3.1 |
100.5 |
18AST02 Spot 21 |
425 |
13565 |
2.6 |
20.2958 |
1.4 |
0.2223 |
1.8 |
0.0327 |
1.2 |
0.64 |
207.6 |
2.4 |
203.8 |
3.3 |
159.8 |
32.2 |
207.6 |
2.4 |
101.9 |
18AST02 Spot 18 |
355 |
22099 |
2.9 |
20.1412 |
1.2 |
0.2243 |
1.5 |
0.0328 |
0.9 |
0.61 |
207.9 |
1.8 |
205.5 |
2.7 |
177.6 |
27.1 |
207.9 |
1.8 |
101.2 |
18AST02 Spot 6 r3 |
561 |
23437 |
2.6 |
20.269 |
1.3 |
0.2229 |
1.7 |
0.0328 |
1.2 |
0.68 |
207.9 |
2.4 |
204.3 |
3.2 |
162.8 |
29.4 |
207.9 |
2.4 |
101.8 |
18AST02 Spot 32 |
437 |
10177 |
2.7 |
20.2719 |
1.7 |
0.2234 |
2.1 |
0.0329 |
1.1 |
0.53 |
208.5 |
2.2 |
204.8 |
3.8 |
162.5 |
40.8 |
208.5 |
2.2 |
101.8 |
18AST02 Spot 34 |
816 |
52858 |
1.2 |
20.2371 |
1.1 |
0.2275 |
1.6 |
0.0334 |
1.1 |
0.69 |
211.8 |
2.3 |
208.1 |
3.0 |
166.5 |
26.7 |
211.8 |
2.3 |
101.8 |
18AST02 Spot 15 |
896 |
187436 |
2.3 |
19.9654 |
0.9 |
0.2419 |
1.8 |
0.035 |
1.5 |
0.86 |
222.1 |
3.4 |
220.0 |
3.6 |
198.0 |
21.1 |
222.1 |
3.4 |
100.9 |
18AST02 Spot 14 |
745 |
335095 |
3.6 |
19.6984 |
1.1 |
0.2579 |
1.5 |
0.0369 |
1.0 |
0.69 |
233.3 |
2.3 |
233.0 |
3.0 |
229.2 |
24.2 |
233.3 |
2.3 |
100.2 |
18AST02 Spot 25 |
789 |
63920 |
1.9 |
19.3093 |
1.1 |
0.3427 |
1.6 |
0.048 |
1.2 |
0.75 |
302.3 |
3.6 |
299.2 |
4.2 |
275.1 |
24.6 |
302.3 |
3.6 |
101.0 |
18AST02 Spot 11 |
280 |
17950 |
2.9 |
18.9815 |
1.2 |
0.4012 |
1.6 |
0.0553 |
1.0 |
0.66 |
346.7 |
3.5 |
342.5 |
4.6 |
314.2 |
26.9 |
346.7 |
3.5 |
101.2 |
18AST02 Spot 4 r2 |
273 |
128556 |
2.6 |
10.7282 |
0.7 |
3.2182 |
1.3 |
0.2505 |
1.1 |
0.85 |
1441.1 |
14.1 |
1461.6 |
10.0 |
1491.4 |
12.8 |
1491.4 |
12.8 |
96.6 |
18AST02 Spot 3 c2 |
224 |
145677 |
2.0 |
9.4398 |
0.8 |
4.5588 |
1.4 |
0.3122 |
1.1 |
0.80 |
1751.8 |
17.1 |
1741.8 |
11.6 |
1729.8 |
15.3 |
1729.8 |
15.3 |
101.3 |
filename:20873.xml