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Baturin, Gleb N; Dubinchuk, V T (2005): (Table 2) Chemical composition of phosphates from the Namibian and Chilean shelves. PANGAEA, https://doi.org/10.1594/PANGAEA.763666, Supplement to: Baturin, GN; Dubinchuk, VT (2005): Authigenic minerals of uranium and rare earth elements in oceanic phosphorites. Translated from Okeanologiya, 2005, 45(6), 906-915, Oceanology, 45(6), 857-866

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Abstract:
This study on phosphorites of different compositions and ages from shelf sediments and seamounts of the Pacific Ocean by means of analytical electron microscopy showed that these phosphorites contain ultra-microscopic inclusions of authigenic minerals and, more rarely, of rare earth element (REE) minerals. In some of phosphorite samples of Pleistocene-Pliocene age from the Namibian shelf both kinds of minerals were found. Uranium minerals were represented by uraninite, coffinite, and ningioite; those of REE - by monazite, xenotime, and bastnesite, which points to their potential accumulation not only as isomorphous admixtures in calcium phosphate but also as independent mineral phases. Coexistence of the minerals noted in shelf phosphorites is caused by repeated changes in redox conditions during formation and then redeposition of phosphate concretions. Presence of uranium minerals in phosphorites from seamounts shows that during an initial step of formation of these phosphorites environment was rather suboxic or reductive than oxic.
Project(s):
Coverage:
Median Latitude: -22.843767 * Median Longitude: -14.116400 * South-bound Latitude: -25.265000 * West-bound Longitude: -70.366700 * North-bound Latitude: -21.133300 * East-bound Longitude: 14.050500
Minimum Elevation: -199.0 m * Maximum Elevation: -85.0 m
Event(s):
AK4-250 * Latitude: -21.133300 * Longitude: -70.366700 * Elevation: -150.0 m * Location: Chile shelf * Campaign: AKU4 * Basis: Akademik Kurchatov * Device: Grab (GRAB)
ML26_2048 * Latitude: -22.133000 * Longitude: 13.967000 * Elevation: -85.0 m * Location: Atlantic Ocean * Campaign: ML26 * Basis: Mikhail Lomonosov * Device: Dredge (DRG)
PL4-12 * Latitude: -25.265000 * Longitude: 14.050500 * Elevation: -199.0 m * Location: Namibian shelf * Device: Grab (GRAB)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5Area/localityAreaBaturin, Gleb N
6Sample typeSamp typeBaturin, Gleb N
7EpochEpochBaturin, Gleb N
8Phosphorus oxideP2O5%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
9Calcium oxideCaO%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
10Magnesium oxideMgO%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
11Sodium oxideNa2O%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
12Potassium oxideK2O%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
13Silicon dioxideSiO2%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
14Aluminium oxideAl2O3%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
15Titanium dioxideTiO2%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
16Iron oxide, Fe2O3Fe2O3%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
17Manganese oxideMnO%Baturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
18Carbon dioxideCO2%Baturin, Gleb NCarbon analyser AN-7529, 7560
19Carbon, organic, totalTOC%Baturin, Gleb NCarbon analyser AN-7529, 7560
20UraniumUmg/kgBaturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
21ThoriumThmg/kgBaturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
22LanthanumLamg/kgBaturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
23CeriumCemg/kgBaturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
24YttriumYmg/kgBaturin, Gleb NICP-MS, Inductively coupled plasma - mass spectrometry
Size:
120 data points

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