Citation:

epic.28306.d001

Name: (Table 1) Detrital modes for sand grains in sediment core CRP-1
Creator: John L Smellie
Published: 1998
License: https://creativecommons.org/licenses/by/3.0/

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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: * 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

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Depth sed [m]	2 Lithology (mean grain size)	3 Qz ang [%]	4 Qz round [%]	5 Qz [%]	6 Pl [%]	7 Kfs [%]	8 Fsp [%]	9 Pyrox [%] (Includes Ti-augite, deep gree...)	10 Amp [%] (Includes rare sodic amphibole)	11 Bt [%] (Mainly brown, rare green)	12 Ms [%]	13 Mica [%]	14 PolyQz [%]	15 Sedim rock [%]	16 Volcanite [%] (LvMVGbasic, McMurdo vulcanic ...)	17 Volcanite [%] (LvMVGevol, McMurdo vulcanic g...)	18 Volcanite [%]	19 Metam [%]	20 Rock fragm [%]	21 Volc glass brown [%]	22 Volc glass clear [%]	23 Volc glass [%]	24 Comp indet [%] (Includes garnet, epidote, opa...)	25 Matrix [%] (Calculated as % of the total ...)
24.53	fine sand	36.630	4.94	41.56	17.28	9.88	27.16	12.35	0.82	1.65	0.4	2.06	0.00	5.35	4.12	0.00	1.65	0.82	11.93	0.82	1.23	2.06	2.06	19.00
26.63	very fine sand to fine sand	21.130	2.80	24.13	16.08	9.09	25.17	11.54	1.40	1.75	0.0	1.75	0.35	8.39	6.29	0.00	1.75	0.00	16.78	11.89	2.45	14.34	4.90	4.67
27.51	medium sand to coarse sand			25.80	15.55	6.36	21.91	3.89	0.00	0.35	0.0	0.35	0.00	43.82	3.53	0.00	0.00	0.00	47.35	0.35	0.00	0.35	0.35	5.67
30.88	fine sand to medium sand	34.940	10.04	44.98	10.04	6.83	16.87	6.83	0.40	0.40	0.0	0.40	1.20	20.88	1.61	0.00	3.21	1.20	28.11	0.40	0.00	0.40	2.01	17.00
44.83	very fine sand to fine sand	16.670	1.06	17.73	21.63	4.96	26.60	4.61	0.35	0.00	0.0	0.00	0.00	0.35	21.28	1.77	1.77	0.00	25.18	20.57	4.96	25.53	0.00	6.00
47.23	very fine sand to fine sand	30.350	0.50	30.85	28.36	8.46	36.82	13.43	0.50	1.00	0.0	1.00	0.00	1.00	6.47	1.00	1.49	0.00	9.95	2.99	1.99	4.98	2.49	33.00
55.85	medium sand to coarse sand	29.800	0.82	30.61	30.20	15.10	45.31	11.02	0.41	3.27	0.4	3.67	1.22	0.00	0.82	0.00	2.04	0.00	4.08	2.45	2.45	4.90	0.00	18.33
60.66	medium sand	42.140	2.86	45.00	13.21	9.64	22.86	11.07	0.71	0.00	0.0	0.00	0.00	0.00	3.21	1.79	3.93	0.00	8.93	8.21	1.43	9.64	1.79	6.67
60.99	fine sand	33.670	2.69	36.36	15.49	5.05	20.54	11.11	0.00	0.34	0.0	0.34	0.00	0.00	9.09	2.02	3.03	0.67	14.81	12.79	2.69	15.49	1.35	1.00
61.88	fine sand	36.730	2.86	39.59	15.92	4.90	20.82	9.80	0.00	1.22	0.0	1.22	0.00	0.00	6.12	3.67	2.04	0.41	12.24	13.47	2.04	15.51	0.82	18.33
65.27	fine sand	37.630	4.30	41.94	23.30	10.39	33.69	15.41	0.72	0.36	0.0	0.36	0.00	0.36	1.43	0.00	1.79	0.00	3.58	2.87	0.36	3.23	1.08	7.00
72.51	fine sand	38.670	1.17	39.84	23.05	8.59	31.64	18.36	0.39	0.00	0.0	0.00	0.00	0.39	1.56	0.00	3.91	0.00	5.86	1.56	1.17	2.73	1.17	14.67
79.50	fine sand to medium sand	44.680	12.77	57.45	16.67	8.16	24.82	10.64	0.71	0.35	0.0	0.35	0.00	0.00	0.71	1.77	1.77	0.00	4.26	0.71	0.35	1.06	0.71	6.00
89.14	medium sand	40.130	15.38	55.52	20.40	7.02	27.42	7.69	0.00	0.00	0.0	0.00	0.00	0.67	2.68	1.34	3.68	0.00	8.36	0.67	0.33	1.00	0.00	0.33
90.72	medium sand	49.500	10.30	59.80	14.62	8.31	22.92	9.63	0.00	0.00	0.3	0.33	0.00	0.00	1.99	0.66	3.99	0.00	6.64	0.33	0.33	0.66	0.00	0.00
91.50	fine sand	43.040	7.59	50.63	19.41	8.02	27.43	10.13	0.00	0.00	0.0	0.00	0.00	0.00	2.95	0.00	2.53	0.00	5.49	0.42	1.69	2.11	4.22	21.00
103.10	fine sand	39.380	5.79	45.17	22.01	12.74	34.75	10.04	0.00	1.16	0.0	1.16	0.00	0.00	1.54	0.39	3.47	0.00	5.41	0.77	1.16	1.93	1.54	13.67
106.90	very fine sand	31.250	1.79	33.04	22.77	17.41	40.18	13.39	1.79	0.45	0.4	0.89	0.45	1.79	1.34	0.00	2.23	0.00	5.80	3.57	0.89	4.46	0.45	25.33
109.70	very fine sand to fine sand	42.500	0.83	43.33	26.25	12.50	38.75	10.83	0.00	0.83	0.0	0.83	0.00	1.25	0.00	0.00	2.50	0.00	3.75	0.42	0.83	1.25	1.25	20.00
115.20	medium sand to coarse sand	29.720	5.94	35.66	32.87	12.59	45.45	8.04	0.70	0.70	0.0	0.70	0.00	0.00	3.50	0.70	3.15	0.70	8.04	0.35	0.35	0.70	0.70	9.21
116.55	fine sand	43.340	5.80	49.15	17.06	8.19	25.26	8.19	1.02	0.00	0.0	0.00	0.34	0.34	2.05	0.00	1.37	0.00	4.10	0.34	11.60	11.95	0.34	5.18
117.55	fine sand to medium sand	35.530	8.06	43.59	23.81	8.79	32.60	8.79	0.37	0.37	0.0	0.37	0.37	2.56	2.56	0.37	2.93	0.00	8.79	0.73	3.66	4.40	1.10	9.00
124.83	very fine sand to fine sand	28.500	1.40	29.91	32.71	13.55	46.26	10.75	0.93	0.47	0.0	0.47	0.00	1.87	0.47	0.47	2.34	0.00	5.14	2.80	1.87	4.67	1.87	28.67
138.52	very fine sand to fine sand	27.000	1.00	28.00	29.50	9.50	39.00	18.50	1.00	1.00	0.0	1.00	0.00	0.50	0.00	0.00	4.50	0.50	5.50	2.50	2.50	5.00	2.00	33.33