This sample belongs to: Tshering Lama Sherpa
Aliquot Name: OK3
IGSN:
Stratigraphic Formation Name: Lesser Himalayan Augen gneiss
Stratigraphic Age: Paleoproterozoic
Rock Type: orthogneiss
Mineral: Zircon
Latitude: 27.44089
Longitude: 86.58054
Internal Uncertainty Level: 2 sigma
External Uncertainty 206/238 (% two sigma): 1.46
External Uncertainty 206/207 (% two sigma): 0.69
Analysis Purpose: Igneous zircon geochronology
Laboratory Name: Arizona LaserChron Center
Analyst Name: Tshering Z.L. Sherpa
Aliquot Reference: Sundell, K.E., Gehrels, G., Pecha, M. (2020), Rapid U-Pb geochronology by laser ablation multicollector ICP-MS, Geostandards and Geoanalytical Research.
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. |
| OK3_4 |
536 |
291656 |
13.9 |
8.903 |
0.9 |
4.6978 |
3.4 |
0.3035 |
3.3 |
0.97 |
1708.6 |
49.2 |
1766.8 |
28.4 |
1836.4 |
15.7 |
1836.4 |
15.7 |
93.0 |
| OK3_5 |
597 |
771223 |
10.4 |
8.927 |
0.6 |
4.3543 |
4.8 |
0.2821 |
4.8 |
0.99 |
1601.7 |
68.0 |
1703.7 |
39.9 |
1831.5 |
10.7 |
1831.5 |
10.7 |
87.5 |
| OK3_9 |
652 |
289403 |
14.2 |
8.996 |
0.8 |
4.099 |
7.1 |
0.2676 |
7.0 |
0.99 |
1528.5 |
95.3 |
1654.1 |
57.6 |
1817.6 |
15.3 |
1817.6 |
15.3 |
84.1 |
| OK3_11 |
422 |
1286279 |
12.2 |
9.014 |
0.9 |
4.4905 |
3.6 |
0.2937 |
3.5 |
0.97 |
1660.0 |
51.2 |
1729.2 |
30.0 |
1814.0 |
16.1 |
1814.0 |
16.1 |
91.5 |
| OK3_15 |
536 |
148964 |
12.7 |
8.806 |
0.8 |
4.4494 |
3.1 |
0.2843 |
3.0 |
0.97 |
1612.9 |
42.2 |
1721.6 |
25.3 |
1856.4 |
13.8 |
1856.4 |
13.8 |
86.9 |
| OK3_18 |
324 |
545603 |
6.7 |
9.077 |
0.9 |
4.6801 |
3.1 |
0.3083 |
3.0 |
0.96 |
1732.1 |
45.6 |
1763.7 |
26.3 |
1801.3 |
16.7 |
1801.3 |
16.7 |
96.2 |
| OK3_19 |
184 |
739170 |
3.2 |
8.702 |
0.9 |
5.0815 |
3.8 |
0.3209 |
3.6 |
0.97 |
1793.9 |
57.1 |
1833.0 |
31.8 |
1877.7 |
16.0 |
1877.7 |
16.0 |
95.5 |
| OK3_21 |
436 |
3472418 |
10.9 |
9.058 |
0.7 |
4.3365 |
2.5 |
0.285 |
2.4 |
0.96 |
1616.5 |
34.5 |
1700.3 |
20.8 |
1805.2 |
13.6 |
1805.2 |
13.6 |
89.5 |
| OK3_22 |
398 |
6377051 |
10.0 |
9.016 |
0.6 |
4.5058 |
2.7 |
0.2948 |
2.7 |
0.97 |
1665.2 |
39.1 |
1732.0 |
22.8 |
1813.7 |
11.8 |
1813.7 |
11.8 |
91.8 |
| OK3_23 |
382 |
400287 |
12.1 |
9.028 |
0.9 |
4.7122 |
2.9 |
0.3087 |
2.7 |
0.95 |
1734.2 |
41.5 |
1769.4 |
24.1 |
1811.2 |
16.8 |
1811.2 |
16.8 |
95.7 |
| OK3_28 |
354 |
1298882 |
1.1 |
8.654 |
0.9 |
4.9036 |
3.5 |
0.3079 |
3.4 |
0.97 |
1730.5 |
51.7 |
1802.9 |
29.7 |
1887.6 |
15.8 |
1887.6 |
15.8 |
91.7 |
| OK3_30 |
897 |
11577943 |
14.0 |
8.893 |
0.8 |
4.4229 |
5.8 |
0.2854 |
5.8 |
0.99 |
1618.4 |
82.3 |
1716.6 |
48.1 |
1838.6 |
15.1 |
1838.6 |
15.1 |
88.0 |
| OK3_32 |
1046 |
1474043 |
13.4 |
8.935 |
2.1 |
4.0114 |
5.8 |
0.2601 |
5.4 |
0.93 |
1490.2 |
71.3 |
1636.5 |
46.9 |
1830.0 |
38.7 |
1830.0 |
38.7 |
81.4 |
| OK3_33 |
446 |
1068538 |
12.5 |
9.041 |
0.4 |
4.7368 |
1.7 |
0.3107 |
1.7 |
0.97 |
1744.3 |
25.5 |
1773.8 |
14.4 |
1808.6 |
7.4 |
1808.6 |
7.4 |
96.4 |
| OK3_36 |
678 |
7122046 |
7.3 |
8.999 |
0.8 |
4.7082 |
2.5 |
0.3074 |
2.4 |
0.95 |
1728.1 |
36.5 |
1768.7 |
21.3 |
1817.0 |
14.6 |
1817.0 |
14.6 |
95.1 |
| OK3_38 |
518 |
136907 |
3.7 |
8.68 |
0.8 |
4.4156 |
3.5 |
0.2781 |
3.4 |
0.97 |
1581.7 |
47.5 |
1715.3 |
28.9 |
1882.4 |
14.8 |
1882.4 |
14.8 |
84.0 |
| OK3_43 |
421 |
2717192 |
9.1 |
9.089 |
0.7 |
4.8499 |
1.9 |
0.3198 |
1.8 |
0.93 |
1788.9 |
27.4 |
1793.6 |
15.8 |
1799.0 |
12.2 |
1799.0 |
12.2 |
99.4 |
| OK3_45 |
416 |
1749794 |
9.0 |
9.13 |
0.6 |
4.7654 |
2.1 |
0.3157 |
2.0 |
0.96 |
1768.7 |
31.2 |
1778.8 |
17.7 |
1790.7 |
10.9 |
1790.7 |
10.9 |
98.8 |
| OK3_47 |
465 |
422657 |
10.9 |
9.038 |
1.0 |
4.7254 |
3.0 |
0.3099 |
2.8 |
0.94 |
1740.1 |
42.8 |
1771.8 |
24.9 |
1809.2 |
17.8 |
1809.2 |
17.8 |
96.2 |
| OK3_48 |
509 |
261623 |
9.7 |
9.082 |
0.7 |
4.6255 |
3.9 |
0.3048 |
3.8 |
0.98 |
1715.2 |
57.2 |
1753.9 |
32.2 |
1800.3 |
12.4 |
1800.3 |
12.4 |
95.3 |
| OK3_50 |
578 |
365419 |
6.1 |
9.068 |
0.7 |
4.438 |
4.6 |
0.292 |
4.5 |
0.99 |
1651.6 |
65.9 |
1719.5 |
37.9 |
1803.2 |
12.8 |
1803.2 |
12.8 |
91.6 |
filename:27536.xml
