Hein James R jhein@usgs.gov Koski Randolph A Morgenson Lisa A 1982 (Table 1) Chemical and lithological composition of rocks from DSDP Hole 465A dataset https://doi.org/10.1594/PANGAEA.696416 Hein James R jhein@usgs.gov Koski Randolph A Morgenson Lisa A 1982 Uranium and thorium enrichment in rocks from the base of DSDP Hole 465A, Hess Rise, Central North Pacific journal article Chemical Geology 36(3-4) https://doi.org/10.1016/0009-2541(82)90050-X 237-251 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. 178.919 178.919 33.8205 33.8205 178.919 33.8205 1978-08-23T00:00:00 1978-08-23T00:00:00 392.8 419.5 vertical profile DSDP Deep Sea Drilling Project http://www.deepseadrilling.org/ Deep Sea Drilling Project DSDP 62-465A 33.8205 178.919 North Pacific/CONT RISE -2161.0 1978-08-23T00:00:00 Leg62 Leg62 1978-07-29T00:00:00 1978-07-29 1978-09-07T00:00:00 1978-09-07 Glomar Challenger https://www-odp.tamu.edu:443/glomar.html Thiede, Jörn Thiede, Jörn Vallier, Tracy L Vallier, Tracy L doi:10.2973/dsdp.proc.62.1981 Glomar Challenger https://www-odp.tamu.edu:443/glomar.html Drilling/drill rig DRILL 476 m 98.9 m 43 cores; 408.5 m cored; 9.5 m drilled; 24.2 % recovery 278 CC-BY-3.0 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ 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. DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Depth sed [m] Sample code/label Sample label DSDP/ODP/IODP sample designation hdl:10013/epic.27914.d001 Hein James R jhein@usgs.gov Sample label (DSDP/ODP/IODP sample designation) Rock type Rock rock Hein James R jhein@usgs.gov Rock Lithology/composition/facies Lithology Hein James R jhein@usgs.gov Lithology Minerals Minerals Hein James R jhein@usgs.gov major Minerals (major) Minerals Minerals Hein James R jhein@usgs.gov moderate Minerals (moderate) Minerals Minerals Hein James R jhein@usgs.gov minor Minerals (minor) Minerals Minerals Hein James R jhein@usgs.gov trace Minerals (trace) Silicon dioxide SiO2 % https://en.wikipedia.org/wiki/Silicon_dioxide silicon dioxide http://purl.obolibrary.org/obo/CHEBI_30563 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov SiO2 [%] (X-ray fluorescence on pressed...) Aluminium oxide Al2O3 % aluminium oxide http://purl.obolibrary.org/obo/CHEBI_30187 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov Al2O3 [%] (X-ray fluorescence on pressed...) Titanium dioxide TiO2 % https://en.wikipedia.org/wiki/Titanium_dioxide titanium dioxide http://purl.obolibrary.org/obo/CHEBI_32234 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov TiO2 [%] (X-ray fluorescence on pressed...) Iron oxide, Fe2O3 Fe2O3 % iron oxide http://purl.obolibrary.org/obo/CHEBI_50816 ferric oxide Fe2O3 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov total Fe as Fe2O3 Fe2O3 [%] (total Fe as Fe2O3, X-ray fluo...) Magnesium oxide MgO % magnesium oxide http://purl.obolibrary.org/obo/CHEBI_31794 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov MgO [%] (X-ray fluorescence on pressed...) Calcium oxide CaO % https://en.wikipedia.org/wiki/Calcium_oxide calcium oxide http://purl.obolibrary.org/obo/CHEBI_31344 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov CaO [%] (X-ray fluorescence on pressed...) Sodium oxide Na2O % sodium oxide Na2O https://pubchem.ncbi.nlm.nih.gov/compound/73971 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov Na2O [%] (X-ray fluorescence on pressed...) Potassium oxide K2O % potassium oxide http://purl.obolibrary.org/obo/CHEBI_88321 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov K2O [%] (X-ray fluorescence on pressed...) Phosphorus pentoxide P2O5 % phosphorus oxide http://purl.obolibrary.org/obo/CHEBI_37349 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov P2O5 [%] (X-ray fluorescence on pressed...) Barium oxide BaO % barium oxide https://pubchem.ncbi.nlm.nih.gov/compound/62392 Dimensionless Ratio ψ X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov BaO [%] (X-ray fluorescence on pressed...) Sulfite [SO3]2- % https://en.wikipedia.org/wiki/Sulfite sulfite http://purl.obolibrary.org/obo/CHEBI_17359 Dimensionless Ratio ψ Hein James R jhein@usgs.gov 3 by difference on barite-rich samples [SO3]2- [%] (3 by difference on barite-ric...) Manganese Mn mg/kg manganese Mn https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:18291 X-ray fluorescence on pressed powder Hein James R jhein@usgs.gov Mn [mg/kg] (X-ray fluorescence on pressed...) Loss on ignition LOI % http://en.wikipedia.org/wiki/Loss_on_ignition loss Dimensionless Ratio ψ Hein James R jhein@usgs.gov at 1050°C LOI [%] (at 1050°C) Sum Sum % sum http://www.oxforddictionaries.com/definition/american_english/sum Dimensionless Ratio ψ Calculated Hein James R jhein@usgs.gov Sum [%] (Calculated) Carbon, organic, total TOC % carbon C https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27594 organic total https://www.oxforddictionaries.com/definition/american_english/total Dimensionless Ratio ψ Element analyser CHN, LECO WR-12 Chemical property sensors CHN elemental analyser http://vocab.nerc.ac.uk/collection/L22/current/TOOL0631/ Hein James R jhein@usgs.gov TOC [%] (Element analyser CHN, LECO WR-12) Calcium carbonate CaCO3 % calcium carbonate http://purl.obolibrary.org/obo/CHEBI_3311 Dimensionless Ratio ψ Element analyser CHN, LECO WR-12 Chemical property sensors CHN elemental analyser http://vocab.nerc.ac.uk/collection/L22/current/TOOL0631/ Hein James R jhein@usgs.gov CaCO3 [%] (Element analyser CHN, LECO WR-12) Uranium U mg/kg uranium Element analysis, neutron activation (NAA) Chemical property sensors elemental analysers http://vocab.nerc.ac.uk/collection/L05/current/LAB01/ Hein James R jhein@usgs.gov U [mg/kg] (Element analysis, neutron act...) Thorium Th mg/kg thorium http://purl.obolibrary.org/obo/CHEBI_33385 Element analysis, neutron activation (NAA) Chemical property sensors elemental analysers http://vocab.nerc.ac.uk/collection/L05/current/LAB01/ Hein James R jhein@usgs.gov differences in detection limits are due to dilutions required to complete the analysis Th [mg/kg] (differences in detection limi...) supplement citable author25771 author32813 author32814 basis12 campaign184 campaign3374925 event12681 geocode1 geocode1599 geocode1600 geocode1601 geocode8128 inst41 journal3311 license101 method10974 method190 method4962 method50 method5004 method5059 param14536 param1546 param1825 param18371 param2208 param24619 param27315 param2834 param2842 param6166 param67 param70 param701 param702 param703 param704 param705 param707 param708 param709 param790 param811 pi25771 project4 ref29002 term1073131 term1073193 term1073224 term1073388 term1073626 term1074034 term1074050 term1074058 term1074190 term1074191 term1074204 term20691 term2299468 term2299833 term2632269 term38253 term38263 term38380 term38477 term38521 term40550 term40802 term41056 term41092 term43794 term43863 term44419 term49257 term49339 term67625 topotype3