Hogan, L G; Scheidegger, Kenneth F; Kulm, LaVerne D; Dymond, Jack R; Mikkelsen, Naja (1978): (Table 1) Argon dating of ash layers from DSDP Hole 18-178 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.718620
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Abstract:
Ash layers from Deep Sea Drilling Project site 178 in the northeast Pacific Ocean have been dated by the 40Ar-39Ar stepwise heating technique to resolve published discrepancies concerning the length of time explosive volcanism has affected the eastern Aleutian arc and Alaskan Peninsula. The results of the investigation indicate that the record of ash-fall deposition at site 178 extends back at least 6.5 m.y. Assuming that 6.5 m.y. ago marks the onset of renewed calc-alkalic volcanism of the volcanic arc, proposed models of continuous and discontinuous motion between the Pacific and North American lithospheric plates can be evaluated. If appreciable time elapsed between the onset of subduction and the onset of arc volcanism, the 6.5-m.y. record of ash-fall deposition in the north-east Pacific is most compatible with models of continuous plate motion throughout late Cenozoic time.
Related to:
Hogan, L G; Scheidegger, Kenneth F; Kulm, LaVerne D; Dymond, Jack R; Mikkelsen, Naja (1978): Biostratigraphic and tectonic implications of 40Ar-39Ar dates of ash layers from the northeast Gulf of Alaska. Geological Society of America Bulletin, 89(8), 1259-1264, https://doi.org/10.1130/0016-7606(1978)89%3C1259:BATIOA%3E2.0.CO;2
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 56.956300 * Longitude: -147.131000
Date/Time Start: 1971-06-30T00:00:00 * Date/Time End: 1971-06-30T00:00:00
Minimum DEPTH, sediment/rock: 242.36 m * Maximum DEPTH, sediment/rock: 456.78 m
Event(s):
18-178 * Latitude: 56.956300 * Longitude: -147.131000 * Date/Time: 1971-06-30T00:00:00 * Elevation: -4218.0 m * Penetration: 794.5 m * Recovery: 212.5 m * Location: North Pacific/PLAIN * Campaign: Leg18 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 471.5 m cored; 48 m drilled; 45.1 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Hogan, L G | DSDP/ODP/IODP sample designation | ||
| 3 | Sample comment | Sample comment | Hogan, L G | |||
| 4 | Temperature, technical | T tech | °C | Hogan, L G | ||
| 5 | Argon-40 at standard pressure | 40Ar STP | 10-6 cm3/g | Hogan, L G | ||
| 6 | Argon-40 | 40Ar | % | Hogan, L G | ||
| 7 | Argon-40/Argon-36 | 40Ar/36Ar | Hogan, L G | corrected | ||
| 8 | Argon-36/Argon-39 | 36Ar/39Ar | 10-3 | Hogan, L G | corrected; in original table given as Ar39/Ar36, recalulated | |
| 9 | Age, dated | Age dated | ka | Hogan, L G | ||
| 10 | Age, error | Age e | ± | Hogan, L G | ||
| 11 | Age, dated | Age dated | ka | Hogan, L G | total isochron age | |
| 12 | Age, dated standard deviation | Age dated std dev | ± | Hogan, L G | of total isochron age | |
| 13 | Age, dated | Age dated | ka | Hogan, L G | preffered isochron age | |
| 14 | Age, dated standard deviation | Age dated std dev | ± | Hogan, L G | of preffered isochron age |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
174 data points
Data
| 1 Depth sed [m] | 2 Sample label | 3 Sample comment | 4 T tech [°C] | 5 40Ar STP [10-6 cm3/g] | 6 40Ar [%] | 7 40Ar/36Ar (corrected) | 8 36Ar/39Ar [10-3] (corrected; in original table ...) | 9 Age dated [ka] | 10 Age e [±] | 11 Age dated [ka] (total isochron age) | 12 Age dated std dev [±] (of total isochron age) | 13 Age dated [ka] (preffered isochron age) | 14 Age dated std dev [±] (of preffered isochron age) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 242.36 | 18-178-28-2,135-137 | step 1 | 400 | 0.34600 | 27.70 | 408.8 | 39.4 | 3390 | 98 | ||||
| 242.36 | 18-178-28-2,135-137 | step 2 | 500 | 0.18300 | 56.10 | 672.6 | 11.3 | 3250 | 91 | ||||
| 242.36 | 18-178-28-2,135-137 | step 3 | 600 | 0.03890 | 22.20 | 379.7 | 66.5 | 4250 | 292 | ||||
| 242.36 | 18-178-28-2,135-137 | step 4 | 800 | 0.00348 | 8.78 | 323.9 | 450.0 | 9700 | 996 | ||||
| 242.36 | 18-178-28-2,135-137 | step 5 | 1000 | 0.11800 | 19.40 | 366.4 | 920.0 | 48900 | 3010 | ||||
| 242.36 | 18-178-28-2,135-137 | step 6, fusion temperature | 0.04850 | 15.00 | 347.6 | 2022.7 | 78500 | 3600 | |||||
| 242.36 | 18-178-28-2,135-137 | 2530 | 90 | 3100 | 100 | ||||||||
| 326.08 | 18-178-34-6,107-109 | step 1 | 400 | 0.17960 | 4.05 | 308.0 | 408.5 | 3870 | 214 | ||||
| 326.08 | 18-178-34-6,107-109 | step 2 | 500 | 0.19510 | 15.20 | 348.6 | 120.1 | 4840 | 181 | ||||
| 326.08 | 18-178-34-6,107-109 | step 3 | 600 | 0.27700 | 23.70 | 387.3 | 68.4 | 4770 | 133 | ||||
| 326.08 | 18-178-34-6,107-109 | step 4 | 800 | 0.05120 | 9.34 | 325.9 | 283.2 | 6540 | 309 | ||||
| 326.08 | 18-178-34-6,107-109 | step 5 | 1000 | 0.01850 | 3.50 | 306.2 | 4310.3 | 34700 | 1970 | ||||
| 326.08 | 18-178-34-6,107-109 | step 6, fusion temperature | 0.01380 | 1.24 | 299.2 | 33333.3 | 92700 | 14700 | |||||
| 326.08 | 18-178-34-6,107-109 | 4430 | 130 | 4900 | 100 | ||||||||
| 456.78 | 18-178-44-4,78-79 | step 1 | 400 | 0.14370 | 10.70 | 331.0 | 116.2 | 7020 | 136 | ||||
| 456.78 | 18-178-44-4,78-79 | step 2 | 500 | 0.18940 | 20.10 | 369.8 | 50.7 | 6400 | 82 | ||||
| 456.78 | 18-178-44-4,78-79 | step 3 | 600 | 0.25920 | 35.10 | 455.0 | 24.6 | 6660 | 81 | ||||
| 456.78 | 18-178-44-4,78-79 | step 4 | 800 | 0.13810 | 30.90 | 427.4 | 30.7 | 6880 | 107 | ||||
| 456.78 | 18-178-44-4,78-79 | step 5 | 1000 | 0.03400 | 9.20 | 325.4 | 255.2 | 13000 | 1230 | ||||
| 456.78 | 18-178-44-4,78-79 | step 6, fusion temperature | 0.02710 | 4.70 | 310.1 | 1897.5 | 46500 | 1230 | |||||
| 456.78 | 18-178-44-4,78-79 | 5760 | 80 | 6500 | 100 |