St. John, Kristen E Kudless; Cowan, Ellen A (2000): Sulfur-isotope analyses of gypsium samples from the Southeast Greenland margin, southern Alaska and Gulf of Alaska (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.763420, Supplement to: St. John, KEK; Cowan, EA (2000): Terrestrial gypsum from Alaska and Greenland in glacially influenced marine sediments. Sedimentary Geology, 136(1-2), 43-58, https://doi.org/10.1016/S0037-0738(00)00083-X
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Gypsum grains were identified in Miocene–Pleistocene sediment cores from two deep-water ODP sites, Site 918 off the SE Greenland margin and Site 887 in the Gulf of Alaska, and in Holocene sediment cores from shallow-water localities in Disenchantment Bay and Muir Inlet in southern Alaska. Although initial morphologic and textural observations suggested a complex system in which the gypsum may have had more than one origin, quantitative sulfur isotope analyses of the gypsum provide evidence of its detrital nature. d34S values in gypsum from southern Alaska range between +0.0 and +7.1 per mil. Gypsum has d34S values between -27.1 and -27.5 per mil in the Gulf of Alaska and values between -28.5 and +0.2 per mil off the SE Greenland margin. All of these isotopic signatures are too highly depleted in d34S to have precipitated from seawater, present or past. In addition there is no significant change in d34S values for gypsum crystals with differing physical characteristics (abraded vs. unabraded) from the same stratigraphic horizon, suggesting all the gypsum is detrital regardless of the degree of abrasion. The isotopic and physical evidence, in combination with the onshore geology the environmental setting, and site characteristics of the gypsum-bearing marine localities, lead us to propose that the ultimate source of the gypsum is precipitation from freeze-induced terrestrial sediment or soil brines. Furthermore the combined evidence suggests that the subsequent occurrence of gypsum in glacimarine sediments results from ice-rafting (by icebergs or sea ice) of the frozen regolith and/or, in the proximal glacimarine setting of southern Alaska, very rapid burial via turbidity currents.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 60.052886 * Median Longitude: -100.282760 * South-bound Latitude: 54.365400 * West-bound Longitude: -148.446000 * North-bound Latitude: 63.926130 * East-bound Longitude: -38.638900
Date/Time Start: 1992-09-09T15:30:00 * Date/Time End: 1993-11-12T16:50:00
Minimum DEPTH, sediment/rock: 0.13 m * Maximum DEPTH, sediment/rock: 2.70 m
Event(s):
145-887A * Latitude: 54.365400 * Longitude: -148.446000 * Date/Time Start: 1992-09-09T15:30:00 * Date/Time End: 1992-09-11T06:15:00 * Elevation: -3643.0 m * Penetration: 286 m * Recovery: 239.84 m * Location: North Pacific Ocean * Campaign: Leg145 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 31 core; 286 m cored; 0 m drilled; 83.9 % recovery
152-918A * Latitude: 63.926130 * Longitude: -38.638900 * Date/Time Start: 1993-10-26T11:29:00 * Date/Time End: 1993-10-28T07:15:00 * Elevation: -1869.0 m * Penetration: 332.7 m * Recovery: 260.27 m * Location: Greenland Sea * Campaign: Leg152 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 38 cores; 332.7 m cored; 0 m drilled; 78.2 % recovery
152-918D * Latitude: 63.092900 * Longitude: -38.638900 * Date/Time Start: 1993-10-28T21:30:00 * Date/Time End: 1993-11-12T16:50:00 * Elevation: -1868.0 m * Penetration: 1310.1 m * Recovery: 254.58 m * Location: Greenland Sea * Campaign: Leg152 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 113 cores; 1012.8 m cored; 0 m drilled; 25.1 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | St. John, Kristen E Kudless | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Description | Description | St. John, Kristen E Kudless | |||
| 5 | δ34S | δ34S | ‰ CDT | St. John, Kristen E Kudless |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
72 data points
Data
| 1 Event | 2 Sample label | 3 Depth sed [m] | 4 Description | 5 δ34S [‰ CDT] |
|---|---|---|---|---|
| 152-918A | 152-918A-17H-1,99-100 | 4 grains | -23.8 | |
| 152-918A | 152-918A-31X-5,47-49 | 1 grain: unabraded | 10.2 | |
| 152-918A | 152-918A-31X-5,47-49 | 5 grains: unabraded | -1.2 | |
| 152-918A | 152-918A-31X-5,47-49 | 2 grains: abraded | -1.0 | |
| 152-918A | 152-918A-31X-5,47-49 | 4 grains: abraded | -2.1 | |
| 152-918D | 152-918A-22R-3,92-94 | 3 grains | -28.5 | |
| 152-918D | 152-918A-25R-5,22-24 | 2 grains | -10.6 | |
| 152-918D | 152-918A-29R-2,107-100 | 2 grains | -12.6 | |
| 152-918D | 152-918A-33R-1,37-39 | 5 grains | -10.4 | |
| 145-887A | 152-918A-5H-1,141-143 | 5 grains: abraded | -27.1 | |
| 145-887A | 152-918A-5H-1,141-143 | 6 grains: abraded | -27.5 | |
| Disenchantment_Bay | AH94 YB11,55 | 0.55 | 1 grain: unabraded | 16.5 |
| Disenchantment_Bay | AH94 YB11,55 | 0.55 | 2 grains: abraded | 16.8 |
| Disenchantment_Bay | AH94 YB11,220 | 2.20 | 3 grains | 17.1 |
| Disenchantment_Bay | AH94 YB11,270 | 2.70 | 4 grains | 16.6 |
| Muir_Inlet | AH93 GB5,13 | 0.13 | 1 grain: unabraded | 12.2 |
| Muir_Inlet | AH93 GB5,13 | 0.13 | 1 grain: abraded | 10.7 |
| Muir_Inlet | AH93 GB5,13 | 0.13 | 2 grains: abraded | 10.4 |
| Muir_Inlet | AH93 GB5,26 | 0.26 | 5 grains: unabraded | 11.0 |
| Muir_Inlet | AH93 GB5,26 | 0.26 | 2 grains: abraded | 10.0 |
| Muir_Inlet | AH93 GB5,50 | 0.50 | 3 grains: unabraded | 13.6 |
| Muir_Inlet | AH93 GB5,50 | 0.50 | 5 grains: abraded | 12.8 |
| Muir_Inlet | AH93 GB7,60 | 0.60 | 1 grain: abraded | 15.2 |
| Muir_Inlet | AH93 GB7,180 | 1.80 | 1 grain | 14.3 |