Citation:

0012-821X(92)90073-5

Name: 10Be and 9Be concentrations and ratios of hydroxylamine leachable and residual phases of DSDP Site 64-477 (Table 1)
Published: 1992
License: https://creativecommons.org/licenses/by/3.0/

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Published: 1992 (exact date unknown) • DOI registered: 2009-03-04

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Abstract:

Profiles of both10Be and9Be concentrations have been measured in sediments from the DSDP, Leg 64, Site 477 core. Established in the deep Guaymas Basin, in an area of high heat flow, this site offers the opportunity of studying hydrothermal alteration induced by two distinct hydrothermal systems, those caused (I) by the intrusion of hot sills into porous sediments and (I) by heat associated with a magma chamber.

The results show that the distribution of both beryllium isotopes between two operationally defined sedimentary phases (material susceptible to hydroxylamine leaching and residual material) changes with the degree of hydrothermal alteration. A decrease in10Be/9Be in the leachable phase of altered sediments relative to unaltered sediments indicates that hydrothermal alteration is not limited to a simple chemical leaching but involves redistribution of the beryllium isotopes between metamorphosed sedimentary phases. In addition, the similarity of the mean10Be/9Be ratios associated with the leachable and the residual phases in the part of the core which has experienced greenschist facies metamorphism suggests that this process leads in the prevailing geophysical conditions to isotopic homogenization.

A close relationship exists between10Be and MgO concentrations in altered sediments from this core. This supports earlier observations that beryllium is not easily removed from the sedimentary column and indicates that this remains the case even under the conditions encountered in submarine hydrothermal systems.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Latitude: 27.030033 * Longitude: -111.399433

Date/Time Start: 1978-12-18T00:00:00 * Date/Time End: 1978-12-18T00:00:00

Minimum DEPTH, sediment/rock: 21.5 m * Maximum DEPTH, sediment/rock: 240.0 m

Event(s):

64-477_Site * Latitude: 27.030033 * Longitude: -111.399433 * Date/Time: 1978-12-18T00:00:00 * Elevation: -2003.0 m * Penetration: 4.626 m * Recovery: 0.701 m * Location: North Pacific/Gulf of California/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 33 cores; 287.6 m cored; 28.5 m drilled; 24.4% recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Sample comment	Sample comment		Bourlès, Didier L
3	Beryllium-9	9Be	10⁹ atoms/g	Bourlès, Didier L	Atomic absorption spectrometry (AAS)	Hydroxylamine leachable phase
4	Beryllium-9	9Be	10⁹ atoms/g	Bourlès, Didier L	Atomic absorption spectrometry (AAS)	Residual pahse
5	Beryllium-9, standard deviation	9Be std dev	±	Bourlès, Didier L	Atomic absorption spectrometry (AAS)	Hydroxylamine leachable phase
6	Beryllium-9, standard deviation	9Be std dev	±	Bourlès, Didier L	Atomic absorption spectrometry (AAS)	Residual pahse
7	Beryllium-10	10Be	10⁹ atoms/g	Bourlès, Didier L	Accelerator mass spectrometry (AMS)	Hydroxylamine leachable phase
8	Beryllium-10	10Be	10⁹ atoms/g	Bourlès, Didier L	Accelerator mass spectrometry (AMS)	Residual phase
9	Beryllium-10, standard deviation	10Be std dev	±	Bourlès, Didier L	Accelerator mass spectrometry (AMS)	Hydroxylamine leachable phase
10	Beryllium-10, standard deviation	10Be std dev	±	Bourlès, Didier L	Accelerator mass spectrometry (AMS)	Residual phase
11	Beryllium-10/Beryllium-9	10Be/9Be	10^-9 atoms/atoms	Bourlès, Didier L	Calculated	Hydroxylamine leachable phase
12	Beryllium-10/Beryllium-9	10Be/9Be	10^-9 atoms/atoms	Bourlès, Didier L	Calculated	Residual phase
13	Beryllium-10/Beryllium-9 ratio, standard deviation	10Be/9Be std dev	±	Bourlès, Didier L	Calculated	Hydroxylamine leachable phase
14	Beryllium-10/Beryllium-9 ratio, standard deviation	10Be/9Be std dev	±	Bourlès, Didier L	Calculated	Residual phase
15	Beryllium-9	9Be	%	Bourlès, Didier L		Residual phase, % of the total 9Be
16	Beryllium-10	10Be	%	Bourlès, Didier L		Residual phase, % of the total 10Be

License:

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

Size:

225 data points

Data

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

1 Depth sed [m]	2 Sample comment	3 9Be [10⁹ atoms/g] (Hydroxylamine leachable phase...)	4 9Be [10⁹ atoms/g] (Residual pahse, Atomic absorp...)	5 9Be std dev [±] (Hydroxylamine leachable phase...)	6 9Be std dev [±] (Residual pahse, Atomic absorp...)	7 10Be [10⁹ atoms/g] (Hydroxylamine leachable phase...)	8 10Be [10⁹ atoms/g] (Residual phase, Accelerator m...)	9 10Be std dev [±] (Hydroxylamine leachable phase...)	10 10Be std dev [±] (Residual phase, Accelerator m...)	11 10Be/9Be [10^-9 atoms/atoms] (Hydroxylamine leachable phase...)	12 10Be/9Be [10^-9 atoms/atoms] (Residual phase, Calculated)	13 10Be/9Be std dev [±] (Hydroxylamine leachable phase...)	14 10Be/9Be std dev [±] (Residual phase, Calculated)	15 9Be [%] (Residual phase, % of the tota...)	16 10Be [%] (Residual phase, % of the tota...)
21.5	Unaltered sediment	28600000	65200000	1400000	3300000	0.32300	0.10700	0.01800	0.01000	11.300	1.640	0.800	0.170	69.5	24.9
32.5	Contact metamorphism	31600000	82900000	1600000	4100000	0.14800	0.06730	0.01000	0.00380	4.680	0.810	0.400	0.060	72.4	31.3
51.5	Contact metamorphism	20300000	60700000	1000000	3000000	0.09820	0.13000	0.00580	0.00700	4.840	2.140	0.370	0.160	74.9	56.9
52.0	Contact metamorphism	19900000	101000000	1000000	5000000	0.07030	0.12500	0.00440	0.00700	3.530	1.240	0.280	0.090	83.5	64.0
60.0	Dolerite sill	8800000	63600000	400000	3200000	0.00048	0.00047	0.00013	0.00013	0.055	0.008	0.016	0.002	87.9	50.3
106.0	Contact metamorphism	34500000	118000000	1700000	5900000	0.10900	0.20400	0.00600	0.01200	3.160	1.730	0.230	0.130	77.4	65.2
120.0	Hydrothermal alteration	23900000	91900000	1200000	4600000	0.04090	0.17200	0.00270	0.01000	1.770	1.870	0.140	0.140	79.4	80.8
126.0	Hydrothermal alteration	35100000	104300000	1800000	5200000	0.06710	0.19900	0.00410	0.01800	1.910	1.910	0.150	0.200	74.8	74.8
146.0	Hydrothermal alteration	16200000	106900000	800000	5300000	0.02030	0.09780	0.00180	0.00610	1.250	0.910	0.130	0.070	86.8	82.8
155.0	Greenschist facies	15900000	148700000	800000	7400000	0.03690	0.34400	0.00250	0.01900	2.320	2.310	0.200	0.170	90.3	90.3
173.0	Greenschist facies	9500000	145600000	500000	7300000	0.01440	0.31200	0.00130	0.01800	1.520	2.140	0.160	0.160	93.9	95.6
185.0	Greenschist facies	9000000	174400000	500000	8700000	0.01600	0.29900	0.00130	0.01700	1.770	1.710	0.170	0.130	95.1	94.9
212.0	Greenschist facies	5500000	129100000	300000	6400000	0.00791	0.10300	0.00081	0.00600	1.450	0.800	0.160	0.060	95.9	92.8
231.0	Greenschist facies	7400000	148200000	400000	7400000	0.00843	0.21500	0.00085	0.01300	1.140	1.450	0.130	0.110	95.2	96.2
240.0	Greenschist facies	4900000	142500000	200000	7100000	0.00729	0.23300	0.00080	0.01400	1.500	1.630	0.180	0.130	96.7	96.9