Smellie, John L (1998): (Table 1) Detrital modes for sand grains in sediment core CRP-1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.54979, Supplement to: Smellie, JL (1998): Sand grain detrital modes in CRP-1: provenance variations and influence of Miocene eruptions on the marine record in the McMurdo Sound region. Terra Antartica, 5(3), 579-587, hdl:10013/epic.28306.d001
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Abstract:
Detrital modes for the sand-size fraction in 24 samples from the CRP-1 drillcore are described. Most samples are largely composed of quartzo-feldspathic detritus sourced dominantly from Palaeozoic granitoids and quartzose sedimentary sequences. Minor contributions from basic lamprophyre dykes, felsic dykes and possibly Kirkpatrick basalts are also identified as detrital components for the first time. The provenance also included a minor outcrop area of high-grade metamorphic rocks. Detritus derived from a Ferrar dolerite source is common throughout. It was possibly derived mainly from thick sills of the lower coastal ranges (intruding Palaeozoic and older "basement") rather than those sills intruding the stratigraphically higher Beacon sedimentary sequence, although this suggestion is not strongly constrained. Tephra particles from both magmatic and hydrovolcanic eruptions are well represented and persistent at all levels in the core, although no primary tephra layers are present. The volcanic influence is minor in most of the Quaternary samples analysed (although these are few) and most Miocene samples. Conversely, the topmost part of the Miocene sequence (above 62 metres below sea floor (mbsf)) is strongly affected by volcanism, with two major basic-intermediate eruptions represented in the detrital record (at c. 61 and 45 mbsf) and provisionally correlated with a volcano formerly situated near Mount Morning. A third eruption of evolved pumice is also recorded in the Miocene sequence at c. 116 mbsf.
Project(s):
Cape Roberts Project (CRP)
Coverage:
Latitude: -77.007580 * Longitude: 163.755080
Date/Time Start: 1997-10-17T01:30:00 * Date/Time End: 1997-10-24T02:00:00
Minimum DEPTH, sediment/rock: 24.53 m * Maximum DEPTH, sediment/rock: 138.52 m
Event(s):
CRP-1 (16 km ENE Cape Roberts) * Latitude: -77.007580 * Longitude: 163.755080 * Date/Time Start: 1997-10-17T01:30:00 * Date/Time End: 1997-10-24T02:00:00 * Elevation: -153.5 m * Penetration: 132.06 m * Recovery: 113.32 m * Location: off Cape Roberts, Ross Sea, Antarctica * Campaign: CRP-1 * Basis: Sampling/drilling ice * Method/Device: Core wireline system (CWS) * Comment: sea ice thickness: 1.60 m, recovery 86 %. Age and lithology of oldest strata: 22-24 Ma; mudstone with scattered pebbles.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Lithology/composition/facies | Lithology | Smellie, John L | Coarse fraction/modal analysis | mean grain size | |
| 3 | Quartz, angular | Qz ang | % | Smellie, John L | Coarse fraction/modal analysis | |
| 4 | Quartz, rounded | Qz round | % | Smellie, John L | Coarse fraction/modal analysis | |
| 5 | Quartz | Qz | % | Smellie, John L | Coarse fraction/modal analysis | |
| 6 | Plagioclase | Pl | % | Smellie, John L | Coarse fraction/modal analysis | |
| 7 | Kalifeldspar | Kfs | % | Smellie, John L | Coarse fraction/modal analysis | |
| 8 | Feldspar | Fsp | % | Smellie, John L | Coarse fraction/modal analysis | |
| 9 | Pyroxene | Pyrox | % | Smellie, John L | Coarse fraction/modal analysis | Includes Ti-augite, deep green cpx, opx, pigeonite |
| 10 | Amphibole | Amp | % | Smellie, John L | Coarse fraction/modal analysis | Includes rare sodic amphibole |
| 11 | Biotite | Bt | % | Smellie, John L | Coarse fraction/modal analysis | Mainly brown, rare green |
| 12 | Muscovite | Ms | % | Smellie, John L | Coarse fraction/modal analysis | |
| 13 | Mica | Mica | % | Smellie, John L | Coarse fraction/modal analysis | |
| 14 | Quartz, polycrystalline | PolyQz | % | Smellie, John L | Coarse fraction/modal analysis | |
| 15 | Sedimentary rock | Sedim rock | % | Smellie, John L | Coarse fraction/modal analysis | |
| 16 | Volcanite | Volcanite | % | Smellie, John L | Coarse fraction/modal analysis | LvMVGbasic, McMurdo vulcanic group, basic |
| 17 | Volcanite | Volcanite | % | Smellie, John L | Coarse fraction/modal analysis | LvMVGevol, McMurdo vulcanic group |
| 18 | Volcanite | Volcanite | % | Smellie, John L | Coarse fraction/modal analysis | |
| 19 | Metamorphite | Metam | % | Smellie, John L | Coarse fraction/modal analysis | |
| 20 | Rock fragments | Rock fragm | % | Smellie, John L | Coarse fraction/modal analysis | |
| 21 | Volcanic glass, brown | Volc glass brown | % | Smellie, John L | Coarse fraction/modal analysis | |
| 22 | Volcanic glass, clear | Volc glass clear | % | Smellie, John L | Coarse fraction/modal analysis | |
| 23 | Volcanic glass | Volc glass | % | Smellie, John L | Coarse fraction/modal analysis | |
| 24 | Components indeterminata | Comp indet | % | Smellie, John L | Coarse fraction/modal analysis | Includes garnet, epidote, opaque oxide, ?aenigmatite, ?glauconite, olivine, zircon, sphene, bioclastic debris (siliceous and carbonate) |
| 25 | Matrix | Matrix | % | Smellie, John L | Coarse fraction/modal analysis | Calculated as % of the total count, excluded from other values in the table |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
574 data points