/* DATA DESCRIPTION: Citation: Hein, James R; Koski, Randolph A; Morgenson, Lisa A (1982): (Table 1) Chemical and lithological composition of rocks from DSDP Hole 465A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.696416, Supplement to: Hein, JR et al. (1982): Uranium and thorium enrichment in rocks from the base of DSDP Hole 465A, Hess Rise, Central North Pacific. Chemical Geology, 36(3-4), 237-251, https://doi.org/10.1016/0009-2541(82)90050-X Abstract: Uranium and thorium are concentrated in Cretaceous limestone, chert, ash, basalt, and other rock types at Deep Sea Drilling Project Site 465 located on the southern Hess Rise in the central North Pacific. U concentrations, up to 194 ppm on a carbonate-free basis, are among the highest recorded for any deep-sea deposits. U was initially derived from seawater and concentrated by absorption on terrigenous (humic) organic matter in limestone in a shallow marine environment. U and Th were probably concentrated further by low-temperature hydrothermal fluids emanating from the basaltic basement. Mainly montmorillonite, an alteration product of basalt and ash, and organic matter in sedimentary rocks acted as hosts for U and Th. The unique combination of sediments rich in humic organic matter, abundant smectite in altered ash and basalt, and warm hydrothermal solutions provided the necessary conditions for migration and concentration of U and Th. To better understand the conditions limiting the migrating and concentration of U and Th, other rocks deposited during the ocean-wide Cretaceous anoxic events should be analyzed for these elements. Project(s): Deep Sea Drilling Project (DSDP) (URI: http://www.deepseadrilling.org/) Coverage: LATITUDE: 33.820500 * LONGITUDE: 178.919000 DATE/TIME START: 1978-08-23T00:00:00 * DATE/TIME END: 1978-08-23T00:00:00 MINIMUM DEPTH, sediment/rock: 392.80 m * MAXIMUM DEPTH, sediment/rock: 419.50 m Event(s): 62-465A * LATITUDE: 33.820500 * LONGITUDE: 178.919000 * DATE/TIME: 1978-08-23T00:00:00 * ELEVATION: -2161.0 m * PENETRATION: 476 m * RECOVERY: 98.9 m * LOCATION: North Pacific/CONT RISE * CAMPAIGN: Leg62 * BASIS: Glomar Challenger (URI: https://www-odp.tamu.edu:443/glomar.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 43 cores; 408.5 m cored; 9.5 m drilled; 24.2 % recovery Comment: In the sample 465A-40-1, 145 (calcareous ash / sulfide-rich fraction) contents of major oxides were measured by quantitative emission spectroscopy; in the samples 465A-40-2, 62 (altered ash) and 465A-40-2, 62 (altered ash, <1 µm fraction) contents of major oxides were measured by semi-quantitative emission spectroscopy. Parameter(s): DEPTH, sediment/rock [m] (Depth sed) * GEOCODE Sample code/label (Sample label) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: DSDP/ODP/IODP sample designation (URI: hdl:10013/epic.27914.d001) Rock type (Rock) * PI: Hein, James R (jhein@usgs.gov) Lithology/composition/facies (Lithology) * PI: Hein, James R (jhein@usgs.gov) Minerals (Minerals) * PI: Hein, James R (jhein@usgs.gov) * COMMENT: major Minerals (Minerals) * PI: Hein, James R (jhein@usgs.gov) * COMMENT: moderate Minerals (Minerals) * PI: Hein, James R (jhein@usgs.gov) * COMMENT: minor Minerals (Minerals) * PI: Hein, James R (jhein@usgs.gov) * COMMENT: trace Silicon dioxide [%] (SiO2) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Aluminium oxide [%] (Al2O3) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Titanium dioxide [%] (TiO2) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Iron oxide, Fe2O3 [%] (Fe2O3) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder * COMMENT: total Fe as Fe2O3 Magnesium oxide [%] (MgO) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Calcium oxide [%] (CaO) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Sodium oxide [%] (Na2O) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Potassium oxide [%] (K2O) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Phosphorus pentoxide [%] (P2O5) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Barium oxide [%] (BaO) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Sulfite [%] ([SO3]2-) * PI: Hein, James R (jhein@usgs.gov) * COMMENT: 3 by difference on barite-rich samples Manganese [mg/kg] (Mn) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: X-ray fluorescence on pressed powder Loss on ignition [%] (LOI) * PI: Hein, James R (jhein@usgs.gov) * COMMENT: at 1050°C Sum [%] (Sum) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: Calculated Carbon, organic, total [%] (TOC) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: Element analyser CHN, LECO WR-12 Calcium carbonate [%] (CaCO3) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: Element analyser CHN, LECO WR-12 Uranium [mg/kg] (U) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: Element analysis, neutron activation (NAA) Thorium [mg/kg] (Th) * PI: Hein, James R (jhein@usgs.gov) * METHOD/DEVICE: Element analysis, neutron activation (NAA) * COMMENT: differences in detection limits are due to dilutions required to complete the analysis License: Creative Commons Attribution 3.0 Unported (CC-BY-3.0) (URI: https://creativecommons.org/licenses/by/3.0/) Size: 278 data points */ Depth sed [m] Sample label (DSDP/ODP/IODP sample designation) Rock Lithology Minerals (major) Minerals (moderate) Minerals (minor) Minerals (trace) SiO2 [%] (X-ray fluorescence on pressed...) Al2O3 [%] (X-ray fluorescence on pressed...) TiO2 [%] (X-ray fluorescence on pressed...) Fe2O3 [%] (total Fe as Fe2O3, X-ray fluo...) MgO [%] (X-ray fluorescence on pressed...) CaO [%] (X-ray fluorescence on pressed...) Na2O [%] (X-ray fluorescence on pressed...) K2O [%] (X-ray fluorescence on pressed...) P2O5 [%] (X-ray fluorescence on pressed...) BaO [%] (X-ray fluorescence on pressed...) [SO3]2- [%] (3 by difference on barite-ric...) Mn [mg/kg] (X-ray fluorescence on pressed...) LOI [%] (at 1050°C) Sum [%] (Calculated) TOC [%] (Element analyser CHN, LECO WR-12) CaCO3 [%] (Element analyser CHN, LECO WR-12) U [mg/kg] (Element analysis, neutron act...) Th [mg/kg] (differences in detection limi...) 392.80 465A-38-2, 80 chert black chert quartz pyroxene, smectite 90.10 4.36 <0.02 0.07 0.13 0.45 <0.15 0.05 0.06 <200 3.15 98.37 0.96 2.0 6.21 <5.0 392.85 465A-38-2, 85 limestone gray limestone calcite quartz 3.01 1.09 <0.02 0.16 0.74 49.20 0.46 0.22 0.19 <200 42.40 97.47 2.94 88.7 20.80 <8.8 400.91 465A-39-1, 91 limestone gray limestone calcite plumbo-jarosite?, quartz 2.33 93.5 12.60 <7.1 410.00 465A-40-1, 50 limestone gray-green limestone calcite dolomite quartz, plumbo-jarosite? 4.44 1.51 <0.02 0.15 1.03 48.30 0.50 0.24 0.36 900 39.90 96.43 2.41 89.0 20.80 <7.5 410.95 465A-40-1, 145 ash dolomite plagioclase high-Mg calcite pyrite, barite, quartz smectite 1.78 32.7 9.83 15.6 410.95 465A-40-1, 145 ash calcareous ash / barite-rich fraction 16.53 5.22 0.27 1.95 5.71 9.76 1.42 0.97 0.10 29.8 13.91 400 14.31 99.95 410.95 465A-40-1, 145 ash calcareous ash / sulfide-rich fraction <21.40 3.02 0.10 >28.59 3.98 7.00 0.96 1.18 <0.05 340 410.95 465A-40-1, 145 ash calcareous ash / dolomite-rich fraction 411.10 465A-40-2, 10 pyrite dark-gray pyrite layer pyrite quartz, plagioclase dolomite, calcite, barite 21.90 5.75 0.10 41.06 0.69 2.71 1.79 2.02 <0.05 3.21 240 20.97 100.20 0.16 7.6 3.73 8.1 411.29 465A-40-2, 29 dolomite gray-green clastic dolomite barite calcite K-feldspar, quartz, pyrite 7.89 2.77 0.09 1.73 4.97 14.20 0.66 0.24 <0.05 33.7 15.15 1000 18.45 99.85 0.93 29.2 0.78 5.9 411.62 465A-40-2, 62 ash altered ash microcline smectite, quartz, plagioclase pyrite, pyroxene, barite, opal-CT apatite, illite 59.90 14.55 0.33 2.57 2.98 0.48 3.77 3.61 0.12 370 0.01 0.4 7.65 35.6 411.62 465A-40-2, 62 ash altered ash, <1 µm fraction montmorillonite 59.90 15.12 0.32 1.72 4.97 0.13 3.64 0.60 0.09 <200 4.79 29.9 411.64 465A-40-2, 64 ash gray laminated ash plagioclase, smectite quartz, pyroxene 6.84 30.1 411.94 465A-40-2, 94 ash yellow-to-gray altered ash plagioclase jarosite, pyrite, smectite quartz illite? 42.24 13.78 0.76 8.39 1.98 1.22 2.70 2.83 0.15 8.0 2.90 <200 15.09 100.04 0.00 0.6 5.23 14.3 412.36 465A-40-2, 136 volcanic breccia gray m-b basalt breccia plagioclase calcite, smectite, pyroxene pyrite apatite? 54.50 17.60 0.98 4.07 3.25 2.29 3.52 2.86 0.18 <200 10.00 99.25 0.00 1.6 4.54 13.3 419.50 465A-41-1, 50 volcanic breccia gray m- b basalt breccia plagioclase pyroxene smectite, pyrite, quartz apatite? 56.70 18.30 0.97 3.53 2.43 2.06 4.61 3.01 0.27 <200 7.29 99.17 <0.01 0.7 4.07 10.9