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Li, Chen; Clementi, Vincent; Bova, Samantha C; Rosenthal, Yair; Childress, Laurel; Wright, James D; Jian, Zhimin (2022): Measured biogenic opal percentage for sites J1002 and J1007, Chilean Margin [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.946045, In: Li, C et al. (2022): Age model, biogenic opal contents and sedimentary U/Th for sites J1002 and J1007, Chilean Margin [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.946044

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Abstract:
Sediment cores at sites J1002 and J1007 were collected from the Chilean Margin during D/V JOIDES Resolution Expedition 379T (JR100) in 2019. Sedimentary Green/Blue (G/B) ratio data were collected during the expedition. Measured biogenic opal contents were compared to the G/B to test the utility of G/B as a proxy for diatom productivity. Laboratory measurements in this study were conducted in 2020 at Rutgers University.
Keyword(s):
biogenic opal; chilean margin; opal mass accumulation rate; organic carbon; oxygen isotope; radiocarbon age model; U/Th
Funding:
Ministry of Science and Technology of the People's Republic of China (MOST), grant/award no. 2018YFE0202401
National Science Foundation (NSF), grant/award no. 1756241: Digging Deeper with the JR100: Extending high resolution paleoclimate records from the Chilean Margin to the Eemian
Coverage:
Median Latitude: -41.306967 * Median Longitude: -74.676828 * South-bound Latitude: -46.071607 * West-bound Longitude: -75.687167 * North-bound Latitude: -36.542327 * East-bound Longitude: -73.666490
Date/Time Start: 2019-07-31T22:08:00 * Date/Time End: 2019-08-13T16:30:00
Minimum DEPTH, sediment/rock: 0.105 m * Maximum DEPTH, sediment/rock: 124.482 m
Event(s):
379T-J1002  * Latitude: -46.071607 * Longitude: -75.687167 * Date/Time Start: 2019-07-31T22:08:00 * Date/Time End: 2019-08-03T13:30:00 * Elevation: -1534.8 m * Campaign: Exp379T * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL)
379T-J1007  * Latitude: -36.542327 * Longitude: -73.666490 * Date/Time Start: 2019-08-12T09:10:00 * Date/Time End: 2019-08-13T16:30:00 * Elevation: -787.1 m * Campaign: Exp379T * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL)
Comment:
Further funding: NETL Methane Hydrates Fellowship Program
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventLi, Chen
2 SiteSiteLi, Chen
3 DEPTH, sediment/rockDepth sedmLi, ChenGeocode
4 AGEAgeka BPLi, ChenGeocode
5 Color, green/blueGreen/blueLi, ChenRGB channels, line-scan camera
6 Opal, biogenic silicabSiO2%Li, ChenWet-alkaline digestion, spectrophotometer
7 CommentCommentLi, Chen
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
144 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Event		2 
Site		3 
Depth sed [m]		4 
Age [ka BP]		5 
Green/blue		6 
bSiO2 [%]		7 
Comment
379T-J1002 J10020.1050.301.2324.36
379T-J1002J10021.6054.481.2622.11
379T-J1002J10022.9057.241.2242.87
379T-J1002J10024.3059.981.2072.61
379T-J1002J10025.70512.841.1391.69
379T-J1002J10027.10515.981.1231.07
379T-J1002J100236.19228.351.0180.63
379T-J1002J100243.19429.691.0030.36
379T-J1002J100259.88339.601.1140.91
379T-J1002J100261.30340.921.0500.70
379T-J1002J100264.11343.551.0880.81
379T-J1002J100292.21655.121.1991.45
379T-J1002J1002121.76281.391.0391.53
379T-J1002J1002124.48283.041.1201.04
379T-J1007 J10070.1100.441.1853.54
379T-J1007J10076.40919.371.1692.80
379T-J1007J10079.60922.641.1161.92
379T-J1007J100711.20924.251.1081.89
379T-J1007J100712.80325.891.0792.63
379T-J1007J100714.39327.611.1264.34
379T-J1007J100722.37538.111.1873.80
379T-J1007J100725.60640.641.1623.81
379T-J1007J100727.23641.651.1833.91
379T-J1007J100733.59945.721.1894.90
379T-J1007J100741.60649.701.1373.41
379T-J1007J100743.20650.381.1864.34
379T-J1007J100748.00152.291.2385.34
379T-J1007J100749.60553.111.1775.35
379T-J1007J100760.80166.011.0982.40
379T-J1007J100767.19779.481.1212.87
379T-J1007J100770.29887.321.1852.83
379T-J1007J100772.00391.021.1292.77
379T-J1007J100775.20397.941.1353.53
379T-J1007J100781.596118.311.1863.65
379T-J1007J100789.602130.971.1462.85
379T-J1007J100799.979143.951.2243.74
379T-J1002J1002104.96567.801.0400.62Data_points_with_underestimated_opal_contents.
379T-J1007J10071.6056.441.2082.20Data_points_with_underestimated_opal_contents.
379T-J1007J10071.6156.481.2202.55Data_points_with_underestimated_opal_contents.
379T-J1007J10073.20512.871.1871.99Data_points_with_underestimated_opal_contents.
379T-J1007J100752.00555.161.2433.03Data_points_with_underestimated_opal_contents.
379T-J1007J100752.80555.841.2503.97Data_points_with_underestimated_opal_contents.
379T-J1007J100753.60556.491.2532.53Data_points_with_underestimated_opal_contents.
379T-J1007J100754.40557.151.2151.98Data_points_with_underestimated_opal_contents.
379T-J1007J100793.838136.041.2072.74Data_points_with_underestimated_opal_contents.