Citation:

epic.28284.d001

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Abstract:

The mineralogy of the lower Oligocene (to possibly upper Eocene) sediments of core CRP-3 drilled on the continental shelf of McMurdo Sound in the Ross Sea, Antarctica, has been examined by the X-ray diffraction method. Quartz, plagioclase K- feldspar and pyroxene are the most important non-clay minerals. Amphibole occurs in minor amounts. The composition of the sediments points exclusively to an origin in the Transantarctic Mountains for the detrical components. There, the plutonic and metamorphic rocks of the basement, the sediments of the Beacon Supergroup and the volcanic rocks of the Ferrar Supergroup could serve as possible source lithologies. The distribution of the detrital minerals reflects a longterm history of successive erosion and beginning valley incision. During the deposition of the lowest part of the Cenozoic sediments of CRP-3, the majority of detrital minerals was probably derived from the sediments of the upper Beacon Supergroup (Victoria Group) and the Ferrar Supergroup, as indicated by the high quartz and pyroxene concentrations. Only a very minor proportion probably was contributed by basement rocks. From c. 620 to c. 420 mbsf the sandstone-dominated Taylor Group of the Beacon Supergroup probably acted as the main source rock and was responsible for maximum quartz concentrations and the strongly lowered feldspar and pyroxene amounts in the CRP-3 core. Above c. 420 mbsf the erosion in the valleys cutting through the Transantarctic mountains reached the level of the basement rocks and therefore the amount of basement-derived minerals like K-feldspar and amphibole in the CRP-3 sediments became more important.

Project(s):

Cape Roberts Project (CRP)

Coverage:

Latitude: -77.006000 * Longitude: 163.719000

Date/Time Start: 1999-10-09T00:00:00 * Date/Time End: 1999-11-19T00:00:00

Minimum DEPTH, sediment/rock: 8.97 m * Maximum DEPTH, sediment/rock: 788.94 m

Event(s):

CRP-3 * Latitude: -77.006000 * Longitude: 163.719000 * Date/Time Start: 1999-10-09T00:00:00 * Date/Time End: 1999-11-19T00:00:00 * Elevation: -295.0 m * Penetration: 939 m * Recovery: 936 m * Location: Ross Sea * Campaign: * Basis: Sampling/drilling from ice * Method/Device: Core wireline system (CWS) * Comment: 11.76 km at 76° true from Cape Roberts, 2.04 km at 225° true from CRP-2. Fast ice thickness: 2.0 to 2.2 m. Sea rise embedded to 9.55 mbsf. Lateral ice movement from spudding 5.0 m to 82° true. HQ core to 345.85 mbsf. NQ core to 939.42 mbsf. Core recovery 97%. Phase 1 logging to 345 mbsf, Phase 2 logging to 773 mbsf, Phase 3 logging to 918 mbsf. Deepest Cenozoic lithology and depth: sandstone breccia from 822.87 to 823.11 mbsf. Age of oldest Cenozoic strata: earliest Oligocene or latest Eocene. Deepest core lithology and depth: light red-brown quartz-cemented quartz sandstone to 939.42 mbsf. Age of bedrock: (mid?) Devonian.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Sand	Sand	%	Ehrmann, Werner	X-ray diffraction, bulk mineralogy
3	Quartz/standard ratio	Qz/std		Ehrmann, Werner	X-ray diffraction, bulk mineralogy	Quartz 4.26 Angström
4	Feldspar/standard ratio	Fsp/std		Ehrmann, Werner	X-ray diffraction, bulk mineralogy
5	Kalifeldspar/standard ratio	Kfs/std		Ehrmann, Werner	X-ray diffraction, bulk mineralogy
6	Plagioclase/standard ratio	Pl/std		Ehrmann, Werner	X-ray diffraction, bulk mineralogy
7	Kalifeldspar/Plagioclase ratio	Kfs/Pl		Ehrmann, Werner	X-ray diffraction, bulk mineralogy
8	Quartz/Feldspar ratio	Qz/Fsp		Ehrmann, Werner	X-ray diffraction, bulk mineralogy	Quartz 4.26 Angström
9	Pyroxene/standard ratio	Pyrox/std		Ehrmann, Werner	X-ray diffraction, bulk mineralogy
10	Amphibole/standard ratio	Amp/std		Ehrmann, Werner	X-ray diffraction, bulk mineralogy
11	Zeolite/standard ratio	Zeo/std		Ehrmann, Werner	X-ray diffraction, bulk mineralogy
12	Opal-CT/standard ratio	Opal-CT/std		Ehrmann, Werner	X-ray diffraction, bulk mineralogy

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

1051 data points

Data

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

1 Depth sed [m]	2 Sand [%]	3 Qz/std	4 Fsp/std	5 Kfs/std	6 Pl/std	7 Kfs/Pl	8 Qz/Fsp	9 Pyrox/std	10 Amp/std	11 Zeo/std	12 Opal-CT/std
8.97	21.63	1.967	7.764	0.996	8.333	0.119	0.253	0.979	0.039	0.020	0.000
18.95	16.19	1.516	2.829	1.148	1.242	0.924	0.536	1.172	0.014	0.000	0.000
27.07	40.63	2.196	2.221	0.454	0.555	0.819	0.989	1.334	0.014	0.000	0.000
36.46	4.72	1.539	3.066	0.737	1.196	0.616	0.502	1.252	0.012	0.000	0.000
47.85	24.31	1.671	4.091	1.002	1.602	0.625	0.408	1.410	0.050	0.000	0.025
55.84	12.15	1.680	2.792	0.685	1.257	0.545	0.602	1.116	0.037	0.000	0.000
66.73	5.48	1.258	3.508	0.778	1.657	0.470	0.359	1.465	0.027	0.000	0.000
72.77	21.06	1.538	2.988	1.060	1.141	0.929	0.515	1.420	0.039	0.000	0.014
78.74	2.47	1.173	2.237	0.751	1.037	0.725	0.524	1.065	0.027	0.050	0.000
83.72	47.35	2.170	3.268	0.951	1.153	0.825	0.664	1.123	0.042	0.073	0.000
89.88	46.41	1.752	3.561	1.322	2.301	0.574	0.492	1.065	0.050	0.074	0.000
98.10	47.63	2.124	2.870	1.570	1.087	1.444	0.740	0.827	0.043	0.000	0.016
102.78	26.09	1.825	1.919	0.550	0.728	0.755	0.951	0.924	0.040	0.066	0.000
106.95	19.75	1.867	2.354	0.649	0.913	0.710	0.793	1.057	0.048	0.070	0.000
116.12	46.57	2.291	2.470	0.684	1.259	0.543	0.927	1.171	0.043	0.063	0.000
123.81	1.02	1.399	2.332	0.545	0.753	0.724	0.600	1.055	0.031	0.056	0.000
135.02	16.26	1.725	2.316	0.726	0.662	1.097	0.745	0.853	0.000	0.135	0.013
145.72	72.48	1.909	2.297	0.550	0.974	0.565	0.831	1.038	0.000	0.084	0.000
150.01	75.00	2.677	2.830	0.578	0.924	0.626	0.946	1.697	0.025	0.000	0.000
155.97	70.57	3.183	1.994	0.791	0.946	0.836	1.596	0.526	0.020	0.048	0.000
165.09	25.38	1.671	2.878	0.816	1.032	0.791	0.581	0.747	0.021	0.016	0.000
170.95	52.72	2.128	2.634	1.002	1.744	0.574	0.808	0.553	0.010	0.029	0.000
179.06	26.80	2.429	2.241	0.352	1.347	0.262	1.084	0.703	0.017	0.040	0.009
187.92	14.23	1.844	1.751	0.385	0.578	0.666	1.053	0.729	0.007	0.047	0.000
197.88	50.70	2.673	3.698	1.194	1.552	0.769	0.723	1.088	0.028	0.075	0.000
208.00	77.54	3.519	2.463	1.267	0.808	1.568	1.429	0.542	0.000	0.070	0.000
217.32	60.31	2.863	1.869	1.178	0.635	1.856	1.532	0.641	0.008	0.023	0.000
221.91	59.88	3.061	1.865	0.618	0.413	1.496	1.641	0.752	0.000	0.013	0.007
227.90	76.16	1.587	3.729	0.506	1.428	0.355	0.426	1.550	0.021	0.000	0.000
231.98	17.61	1.991	1.806	0.687	0.655	1.048	1.103	0.667	0.000	0.000	0.000
239.84	84.38	3.043	1.386	0.388	0.000		2.196	0.399	0.000	0.000	0.010
246.03	81.85	3.268	0.513	0.256	0.199	1.290	6.376	0.078	0.000	0.000	0.000
258.57	18.90	1.936	2.153	0.873	0.000		0.899	0.579	0.011	0.000	0.000
262.70	91.66	2.420	4.478	0.000	1.263	0.000	0.540	1.089	0.000	0.087	0.000
269.51	22.46	2.036	1.757	0.581	0.514	1.130	1.159	0.689	0.000	0.000	0.000
275.81	29.98	2.541	2.528	1.437	0.703	2.044	1.005	0.614	0.000	0.000	0.000
283.90	83.39	3.379	1.802	0.332	1.325	0.251	1.875	0.380	0.000	0.216	0.000
297.31	80.08	2.524	2.852	0.241	0.406	0.595	0.885	0.638	0.000	0.000	0.000
307.21	64.06	2.227	1.288	0.578	0.386	1.498	1.728	0.314	0.010	0.000	0.000
313.31	29.14	2.023	1.509	0.407	0.645	0.631	1.341	0.573	0.012	0.000	0.000
318.36	45.21	2.124	1.915	0.448	0.727	0.616	1.109	0.589	0.018	0.010	0.010
325.10	39.78	3.515	1.665	0.438	0.535	0.820	2.111	0.463	0.000	0.000	0.000
330.97	42.77	1.830	2.802	0.754	1.329	0.567	0.653	0.723	0.181	0.000	0.000
339.98	39.62	2.595	2.629	1.541	1.035	1.489	0.987	0.518	0.012	0.000	0.000
349.78	91.24	3.183	1.514	0.428	0.870	0.492	2.102	0.224	0.013	0.165	0.000
357.80	82.76	2.470	3.140	1.899	1.035	1.834	0.787	0.727	0.000	0.547	0.015
361.92	55.93	2.275	2.395	0.397	0.738	0.537	0.950	0.340	0.000	0.000	0.000
377.23	94.67	2.500	0.804	0.264	0.318	0.831	3.110	0.109	0.000	0.000	0.000
386.13	84.41	3.063	1.285	0.489	0.625	0.782	2.383	0.345	0.000	0.000	0.000
397.97	93.77	2.696	0.703	0.208	0.264	0.786	3.837	0.256	0.000	0.000	0.000
406.09	8.73	1.841	3.522	0.791	0.906	0.874	0.523	0.562	0.018	0.013	0.013
411.29	16.26	1.750	1.927	0.547	0.659	0.831	0.908	0.614	0.008	0.012	0.012
416.80	82.66	3.056	1.901	0.000	1.414	0.000	1.608	0.260	0.017	0.000	0.000
426.72	95.10	3.639	1.273	0.865	0.196	4.417	2.858	0.187	0.000	0.000	0.000
434.62	87.39	3.009	0.831	0.411	0.214	1.916	3.622	0.357	0.000	0.000	0.000
443.05	84.98	3.258	0.688	0.000	0.159	0.000	4.737	0.097	0.017	0.000	0.000
454.95	94.95	3.420	0.602	0.329	0.172	1.911	5.677	0.201	0.006	0.000	0.000
464.95	85.70	3.447	1.789	0.763	0.235	3.248	1.927	0.290	0.000	0.000	0.000
477.01	92.98	4.162	0.603	0.281	0.125	2.258	6.903	0.264	0.000	0.000	0.000
485.63	96.10	4.113	0.666	0.000	0.347	0.000	6.171	0.124	0.000	0.000	0.000
495.39	98.29	2.995	0.483	0.248	0.000		6.201	0.130	0.000	0.000	0.000
505.82	98.38	4.251	0.865	0.939	0.074	12.641	4.912	0.101	0.000	0.000	0.000
516.68	92.92	2.978	0.923	0.312	0.313	0.994	3.228	0.291	0.000	0.000	0.000
524.78	92.03	4.218	0.698	0.198	0.347	0.571	6.044	0.146	0.000	0.000	0.000
534.39	94.05	4.340	0.455	0.322	0.198	1.625	9.536	0.000	0.000	0.000	0.000
542.73	83.98	2.106	0.657	0.247	0.224	1.106	3.205	0.231	0.005	0.000	0.000
551.69	82.76	2.547	1.412	0.327	0.991	0.330	1.803	0.264	0.006	0.000	0.000
560.24	90.43	3.587	1.589	0.475	0.435	1.091	2.258	0.163	0.012	0.000	0.102
571.10	98.81	3.593	0.249	0.141	0.050	2.828	14.425	0.056	0.007	0.000	0.000
579.95	92.39	2.753	0.803	0.000	0.458	0.000	3.428	0.129	0.008	0.000	0.000
587.89	91.44	3.733	0.629	0.182	0.000		5.932	0.147	0.006	0.000	0.000
592.71	89.97	2.707	1.380	0.588	0.592	0.994	1.961	0.143	0.010	0.000	0.000
601.75	83.83	3.052	1.701	0.612	0.480	1.275	1.794	0.419	0.000	0.000	0.021
611.42	91.36	2.982	1.211	0.291	0.616	0.472	2.463	0.129	0.007	0.000	0.031
620.48	85.45	3.124	2.069	0.597	0.998	0.598	1.510	0.358	0.021	0.000	0.012
629.58	80.92	1.994	4.216	1.279	1.238	1.033	0.473	1.170	0.000	0.000	0.000
637.79	81.22	2.868	2.652	2.055	0.879	2.338	1.081	0.368	0.008	0.000	0.000
642.81	80.65	2.517	2.494	0.195	3.459	0.056	1.009	0.136	0.013	0.000	0.009
651.81	68.26	2.226	3.074	3.346	0.612	5.467	0.724	0.292	0.003	0.000	0.000
661.05	55.92	1.640	3.652	1.439	2.450	0.587	0.449	0.246	0.000	0.000	0.000
669.06	88.36	2.832	1.423	0.319	0.979	0.326	1.990	0.275	0.000	0.015	0.000
677.91	82.75	2.558	3.353	0.382	2.455	0.155	0.763	0.609	0.000	0.000	0.000
685.93	82.51	2.514	2.922	0.801	1.649	0.486	0.860	0.620	0.009	0.000	0.000
692.85	79.76	3.412	1.372	0.735	0.460	1.597	2.488	0.218	0.013	0.000	0.000
702.94	76.37	2.969	1.654	0.448	1.006	0.445	1.795	0.208	0.006	0.015	0.000
711.07	67.58	1.295	3.145	1.139	1.304	0.873	0.412	1.706	0.000	0.000	0.000
722.92	70.96	1.794	3.183	1.236	2.167	0.570	0.564	0.388	0.002	0.000	0.000
728.17	77.74	2.171	4.883	0.462	3.195	0.145	0.445	0.886	0.000	0.000	0.000
737.09	76.37	2.615	1.430	0.373	0.670	0.556	1.829	0.325	0.000	0.000	0.000
747.25	64.09	2.847	2.229	0.795	0.872	0.911	1.278	0.391	0.004	0.000	0.000
755.95	80.10	2.896	2.341	0.970	1.256	0.772	1.237	0.476	0.010	0.000	0.000
765.01	51.71	2.387	1.621	0.396	0.746	0.530	1.472	0.425	0.009	0.000	0.000
774.87	80.38	2.908	1.271	0.158	1.629	0.097	2.288	0.056	0.000	0.014	0.000
778.93	85.72	3.369	1.270	0.939	0.000		2.654	0.206	0.004	0.000	0.000
782.25	82.74	2.515	0.653	0.130	0.353	0.368	3.849	0.159	0.000	0.000	0.000
788.94	42.10	2.001	2.001	0.553	0.728	0.760	1.000	0.548	0.000	0.000	0.000