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  • 1
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    Rare earth element content of the clay fraction from sediment core CRP-1 (Table 2)
    PANGAEA
    In:  Supplement to: Setti, Massimo; Marinoni, L; Lopez-Galindo, A; Aboud, A B (1998): TEM observations and trace element analysis on the clay minerals of the CRP-1 Core (Ross Sea, Antarctica). Terra Antartica, 5(3), 621-626, hdl:10013/epic.28308.d001
    Details
    Publication Date: 2023-06-27
    Description: TEM observations on smectites and REE analyses on the clay minerals of the sediments of CRP-1 core were carried out to investigate their origin and the source rocks from which they were derive from. Smectites are mostly dioctahedral, but Fe-Mg richer than in other cores from Ross Sea. In addition, small amounts of nontronites and trioctahedral smectites (probably saponites) were found. Smectite microparticles are mainly flaky, but significant percentages of hairy smectites were also recognized. Micromorphologies indicate that smectites were derived from the continent but, in addition, they formed in situ through recrystallisation processes. The shale-normalised rare earth elements patterns are very homogeneous, and their features are typical of land-derived sediments. The smectites of CRP-1 formed from parent rocks influenced by volcanic activity, and the source areas probably represented by both the basaltic rocks of the the McMurdo Volcanic Group and the complex of basement and sedimentary rocks cropping out in the Transantarctic Mountains.
    Keywords: 16 km ENE Cape Roberts; Cape Roberts Project; Cerium; Core wireline system; CRP; CRP-1; CWS; DEPTH, sediment/rock; Dysprosium; Erbium; Europium; Gadolinium; Holmium; Inductively coupled plasma - mass spectrometry (ICP-MS); Lanthanum; Lutetium; Neodymium; off Cape Roberts, Ross Sea, Antarctica; Praseodymium; Samarium; Sampling/drilling ice; Terbium; Thulium; Ytterbium
    Type: Dataset
    Format: text/tab-separated-values, 210 data points
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    DATA PANGAEA
  • 2
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    (Table 1) Average composition of smectites of sediment core CRP-3
    PANGAEA
    In:  Supplement to: Setti, Massimo; Marinoni, L; Lopez-Galindo, A (2001): Crystal-chemistry of smectites in sediments of CRP-3 drillcore (Victoria Land Basin, Antarctica): preliminary results. Terra Antartica, 8(4), 543-550, hdl:10013/epic.28222.d001
    Details
    Publication Date: 2023-06-27
    Description: The aim of this work is to evaluate the origin of smectites in sediments of CRP-3 core (Victoria Land Basin, Antarctica), through TEM observations and microanalyses on smectite microparticles and XRD analyses of clay fractions. Smectites in the lower sedimentary section (between 602.05 and 815.86 mbsf), and in some levels of the central section of the core, are intermediate members of the beidellite-saponite series, with lower K and higher Mg contents in interlayer and higher cristallinity values. The clay fraction largely consists of smectite, that is regarded as authigenic. Smectites in the upper (between 6.60 and 101.69 mbsf) and in some other levels of the central section of the core are Al-Fe beidellites, with higher K and lower Mg contents in interlayer sites and lower values of crystallinity. In the clay fraction illite and chlorite also occur. These characteristics suggest that smectites in these sediments are detrital. Smectites in an igneous body (between 901.20 and 919.06 mbsf) have a homogeneous composition and are Al-rich beidellite-montmorillonites; the clay fraction is mostly composed by kaolinite with mixed-layer smectite-illite or kaolinite-smectite. Authigenic smectites probably formed from the alteration of volcanic material (pyroxenes, glasses) and/or through precipitation from fluids of possible hydrothermal origin.
    Keywords: Aluminium (IV); Aluminium (VI); Calcium; Cape Roberts Project; Core wireline system; CRP; CRP-3; CWS; DEPTH, sediment/rock; Iron 3+; Magnesium; Magnesium (VI); Potassium; Ross Sea; Sampling/drilling from ice; Silicon; Titanium
    Type: Dataset
    Format: text/tab-separated-values, 180 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Clay mineralogy of core CRP-1 (2005)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 16 km ENE Cape Roberts; Cape Roberts Project; Chlorite; Core wireline system; CRP; CRP-1; CWS; DEPTH, sediment/rock; Illite; Illite 5Å/10Å Esquevin-index; Illite crystallinity; Illite position 10Å; Kaolinite; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling ice; Size fraction 〈 0.002 mm, clay; Smectite; Smectite crystallinity; X-ray diffraction TEXTUR, clay fraction
    Type: Dataset
    Format: text/tab-separated-values, 943 data points
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    DATA PANGAEA
  • 4
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    Clay mineralogy of core CRP-2 (2005)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 14.2 km at 096° true from Cape Roberts; Cape Roberts Project; Chlorite; Core wireline system; CRP; CRP-2; CRP-2A; CWS; DEPTH, sediment/rock; Grain size, sieving/settling tube; Illite; Illite 5Å/10Å Esquevin-index; Illite crystallinity; Illite position 10Å; Kaolinite; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling from ice; Size fraction 〈 0.002 mm, clay; Smectite; Smectite crystallinity; X-ray diffraction TEXTUR, clay fraction
    Type: Dataset
    Format: text/tab-separated-values, 1139 data points
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    DATA PANGAEA
  • 5
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    Clay mineralogy of core CRP-3 (2005)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Cape Roberts Project; Chlorite; Core wireline system; CRP; CRP-3; CWS; DEPTH, sediment/rock; Grain size, sieving/settling tube; Illite; Illite 5Å/10Å Esquevin-index; Illite crystallinity; Illite position 10Å; Kaolinite; Ross Sea; Sampling/drilling from ice; Size fraction 〈 0.002 mm, clay; Smectite; Smectite crystallinity; X-ray diffraction TEXTUR, clay fraction
    Type: Dataset
    Format: text/tab-separated-values, 1046 data points
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    DATA PANGAEA
  • 6
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    Geochemistry on smectites in sediment cores CRP-1 and CRP-2 from the Ross Sea, Antarctica
    PANGAEA
    In:  Supplement to: Setti, Massimo; Marinoni, L; Lopez-Galindo, A; Delgado-Huertas, Antonio (2000): Compositional and morphological features of the smectites of the sediments of CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 581-587, hdl:10013/epic.28251.d001
    Details
    Publication Date: 2023-06-27
    Description: TEM (transmission electron microscopy) observations and microanalyses on smectite microparticles in the sediments of the CRP-2A core were carried out to determine their origin (authigenic or detrital) and the source rocks. Smectites are dioctahedral and are Fe-rich members of the nontronite-beidellite series. They generally display both flaky and hairy shapes, but no large compositional difference between the two forms was observed. Flaky smectites are detrital while hairy smectites probably formed in situ through the reorganisation of previous flaky particles. The source rocks for smectites are probably represented by the McMurdo Volcanic Group to the south, but also by the Ferrar Dolerites and Kirkpatrick Basalts in the Transantarctic Mountains. CRP-2A smectites are Fe and Mg richer than those of the coeval or not coeval levels of the CIROS-I, DSDP 270 and 274 cores. The average compositions of smectite in CRP-1 and CRP-2A cores show a downcore trend toward more alluminiferous terms, which might reflect the increase of the chemical weathering processes on the continent.
    Keywords: 14.2 km at 096° true from Cape Roberts; 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; CRP; CRP-1; CRP-2; CRP-2A; CWS; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling from ice; Sampling/drilling ice
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table 2) Average major elements composition of smectites of sediment core CRP-2A
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 14.2 km at 096° true from Cape Roberts; Aluminium oxide; Cape Roberts Project; Core wireline system; CRP; CRP-2; CRP-2A; CWS; DEPTH, sediment/rock; Iron oxide, Fe2O3; Magnesium oxide; off Cape Roberts, Ross Sea, Antarctica; Potassium oxide; Sampling/drilling from ice; Silicon dioxide
    Type: Dataset
    Format: text/tab-separated-values, 95 data points
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    DATA PANGAEA
  • 8
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    (Table 2) Average major elements composition of smectites of sediment core CRP-1
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 16 km ENE Cape Roberts; Aluminium oxide; Cape Roberts Project; Core wireline system; CRP; CRP-1; CWS; DEPTH, sediment/rock; Iron oxide, Fe2O3; Magnesium oxide; off Cape Roberts, Ross Sea, Antarctica; Potassium oxide; Sampling/drilling ice; Silicon dioxide
    Type: Dataset
    Format: text/tab-separated-values, 75 data points
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    DATA PANGAEA
  • 9
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    (Table 1) Average composition of smectites of sediment core CRP-2A
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 14.2 km at 096° true from Cape Roberts; Aluminium (IV); Aluminium (VI); Calcium; Cape Roberts Project; Core wireline system; CRP; CRP-2; CRP-2A; CWS; DEPTH, sediment/rock; Iron 3+; Magnesium; Magnesium (VI); off Cape Roberts, Ross Sea, Antarctica; Potassium; Sampling/drilling from ice; Silicon; Titanium
    Type: Dataset
    Format: text/tab-separated-values, 171 data points
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    DATA PANGAEA
  • 10
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    Clay mineralogy of Cape Roberts sediment cores (2005)
    PANGAEA
    In:  Supplement to: Ehrmann, Werner; Setti, Massimo; Marinoni, L (2005): Clay minerals in Cenozoic sediments off Cape Roberts (McMurdo Sound, Antarctica) reveal palaeoclimatic history. Palaeogeography, Palaeoclimatology, Palaeoecology, 229(3), 187-211, https://doi.org/10.1016/j.palaeo.2005.06.022
    Details
    Publication Date: 2023-10-28
    Description: The clay mineral assemblages of the ca. 1600 m thick Cenozoic sedimentary succession recovered at the CRP-1, CRP-2/2A and CRP-3 drill sites off Cape Roberts on the McMurdo Sound shelf, Antarctica, were analysed in order to reconstruct the palaeoclimate and the glacial history of this part of Antarctica. The sequence can be subdivided into seven clay mineral units that reflect the transition from humid to subpolar and polar conditions. Unit I (35-33.6 Ma) is characterised by an almost monomineralic assemblage consisting of well crystalline, authigenic smectite, and therefore does not allow a palaeoclimatic reconstruction. Unit II (33.6-33.1 Ma) has also a monomineralic clay mineral composition. However, the assemblage consists of variably crystallized smectite that, at least in part, is of detrital origin and indicates chemical weathering under a humid climate. The main source area for the clays was in the Transantarctic Mountains. Minor amounts of illite and chlorite appear for the first time in Unit III (33.1-31 Ma) and suggest subordinate physical weathering. The sediments of Unit IV (31-30.5 Ma) have strongly variable smectite and illite concentrations indicating an alternation of chemical weathering periods and physical weathering periods. Unit V (30.5-24.2 Ma) shows a further shift towards physical weathering. Unit VI (24.2-18.5 Ma) indicates strong physical weathering under a cold climate with persistent and intense illite formation. Unit VII (18.5 Ma to present) documents an additional input of smectite derived from the McMurdo Volcanic Group in the south.
    Keywords: 14.2 km at 096° true from Cape Roberts; 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; CRP; CRP-1; CRP-2; CRP-2A; CRP-3; CWS; off Cape Roberts, Ross Sea, Antarctica; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Ross Sea; Sampling/drilling from ice; Sampling/drilling ice; SPP1158
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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