Citation:

egqsj-66-57-2017

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Abstract:

During the Pleistocene, glaciers advanced repeatedly from the Alps onto the Swiss Plateau. Numeric age control for the last glaciation is good and thus the area is well suited to test a method which has so far not been applied to till in Switzerland. In this study, we apply in situ produced cosmogenic 10Be depth profile dating to several till deposits. Three sites lie inside the assumed Last Glacial Maximum (LGM) extent of the Rhône and Aare glaciers (Bern, Deisswil, Steinhof) and two lie outside (Niederbuchsiten, St. Urban). All sites are strongly affected by denudation, and all sites have reached steady state, i.e., the 10Be production is in equilibrium with radioactive decay and denudational losses. Deposition ages can therefore not be well constrained. Assuming constant denudation rates of 5 cm/kyr, total denudation on the order of 100 cm for sites within the extent of the LGM and up to tens of meters for older moraines are calculated. Denudation events, for example related to periglacial conditions during the LGM, mitigate the need to invoke such massive denudation and could help to explain high 10Be concentrations at great depths, which we here dub "pseudo-inheritance". This term should be used to distinguish conceptionally from "true inheritance", i.e., high concentrations derived from the catchment.

Coverage:

Median Latitude: 47.121400 * Median Longitude: 7.645000 * South-bound Latitude: 46.922000 * West-bound Longitude: 7.453000 * North-bound Latitude: 47.286000 * East-bound Longitude: 7.855000

Minimum DEPTH, sediment/rock: 0.100 m * Maximum DEPTH, sediment/rock: 3.800 m

Event(s):

Deisswil * Latitude: 47.034000 * Longitude: 7.465000 * Elevation: 574.0 m * Location: Switzerland * Method/Device: Rock sample (ROCK)

Gurten * Latitude: 46.922000 * Longitude: 7.453000 * Elevation: 654.0 m * Location: Switzerland * Method/Device: Rock sample (ROCK)

Niederbuchsiten * Latitude: 47.286000 * Longitude: 7.770000 * Elevation: 483.0 m * Location: Switzerland * Method/Device: Rock sample (ROCK)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Wüthrich, Lorenz
2	Latitude of event	Latitude		Wüthrich, Lorenz
3	Longitude of event	Longitude		Wüthrich, Lorenz
4	Elevation of event	Elevation	m	Wüthrich, Lorenz
5	Sample code/label	Sample label		Wüthrich, Lorenz
6	Beryllium-10, production rate per year	10Be prod	atoms/g/a	Wüthrich, Lorenz
7	DEPTH, sediment/rock	Depth sed	m	Wüthrich, Lorenz	Geocode
8	Mass per area	Mass	g/cm²	Wüthrich, Lorenz	density is 2.2 g/cm**3
9	Quartz, dissolved	Qz diss	g	Wüthrich, Lorenz
10	Carrier	Carrier		Wüthrich, Lorenz	9Be carrier added [mg]
11	Beryllium-10/Beryllium-9	10Be/9Be	10^-9 atoms/atoms	Wüthrich, Lorenz
12	Beryllium-10/Beryllium-9, standard deviation	10Be/9Be std dev	±	Wüthrich, Lorenz
13	Beryllium-10	10Be	10⁹ atoms/g	Wüthrich, Lorenz
14	Beryllium-10, standard deviation	10Be std dev	±	Wüthrich, Lorenz

License:

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

Size:

181 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 Sample label	6 10Be prod [atoms/g/a]	7 Depth sed [m]	8 Mass [g/cm²]	9 Qz diss [g]	10 Carrier	11 10Be/9Be [10^-9 atoms/atoms]	12 10Be/9Be std dev [±]	13 10Be [10⁹ atoms/g]	14 10Be std dev [±]
Gurten	46.9220	7.4530	654	G1	7.07	0.100	22	29.3	0.3	0.000118	0.000010	0.0000811	0.0000067
Gurten	46.9220	7.4530	654	G2		0.400	88	23.3	0.56	0.000033	0.000006	0.0000278	0.0000048
Gurten	46.9220	7.4530	654	G3		1.650	363	8.8	0.32	0.000004	0.000002	0.0000101	0.0000046
Deisswil	47.0340	7.4650	574	DW1	6.61	0.500	110	2.8	0.31	0.000076	0.000009	0.0000621	0.0000078
Deisswil	47.0340	7.4650	574	DW2		0.800	176	11.7	0.42	0.000080	0.000010	0.0000432	0.0000055
Deisswil	47.0340	7.4650	574	DW3		2.000	440	12.7	0.3	0.000017	0.000003	0.0000267	0.0000050
Steinhof	47.1550	7.6820	593	SH1	6.71	0.100	22	42.0	0.3	0.000160	0.000008	0.0000769	0.0000039
Steinhof	47.1550	7.6820	593	SH2		0.300	66	34.2	0.3	0.000109	0.000007	0.0000633	0.0000039
Steinhof	47.1550	7.6820	593	SH3		0.600	132	31.1	0.38	0.000043	0.000004	0.0000353	0.0000034
Steinhof	47.1550	7.6820	593	SH4		0.900	198	33.3	0.3	0.000045	0.000005	0.0000267	0.0000027
Steinhof	47.1550	7.6820	593	SH5		1.200	264	25.1	0.3	0.000026	0.000003	0.0000209	0.0000023
Steinhof	47.1550	7.6820	593	SH6		1.500	330	23.8	0.3	0.000300	0.000004	0.0000251	0.0000030
Steinhof	47.1550	7.6820	593	SH7		1.900	418	41.7	0.31	0.000340	0.000004	0.0000171	0.0000019
Niederbuchsiten	47.2860	7.7700	483	NB1	6.13	0.300	66	44.1	0.3	0.000184	0.000009	0.0000827	0.0000041
Niederbuchsiten	47.2860	7.7700	483	NB2		0.700	154	10.8	0.3	0.000031	0.000004	0.0000579	0.0000066
Niederbuchsiten	47.2860	7.7700	483	NB3		1.000	220	38.9	0.3	0.000102	0.000007	0.0000521	0.0000034
Niederbuchsiten	47.2860	7.7700	483	NB4		1.500	330	47.2	0.3	0.000081	0.000008	0.0000344	0.0000032
Niederbuchsiten	47.2860	7.7700	483	NB5		2.200	484	46.5	0.2	0.000096	0.000007	0.0000282	0.0000021
St_Urban	47.2100	7.8550	540	U1	6.43	0.275	60	35.5	0.35	0.000225	0.000038	0.0000879	0.0000150
St_Urban	47.2100	7.8550	540	U2		0.660	145	25.3	0.25	0.000155	0.000017	0.0001231	0.0000141
St_Urban	47.2100	7.8550	540	U3		1.600	352	33.3	0.29	0.000168	0.000017	0.0000961	0.0000108
St_Urban	47.2100	7.8550	540	U4		3.800	836	51.0	0.51	0.000170	0.000018	0.0000648	0.0000072