Citation:

A:1014868332041

Name: Chemical composition of layer silicates from the Sado Ridge, Sea of Japan
Published: 2002
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Detailed mineralogical investigations of high-Fe layer silicates from loose sediments (glauconite sands) of the Sado Ridge revealed that green aggregates found on submarine rises of the Japan Sea floor have different genesis. It was demonstrated that round dark green grains approximate micas in composition. Primary volcanic rocks presumably have undergone extensive secondary alterations and then were disintegrated. Their disintegration products (protoceladonite) filling pores were redeposited and buried in sediments for a long time. Angular green grains mainly represented by smectite also formed at lower temperatures during disintegration of altered volcanosedimentary rocks. These younger grains had no prolonged exposure. Pseudomorphs of siliceous microplankton consist of both hydromica and smectites. They are presumably authigenic products formed with participation of microorganisms or electrostatic processes (spherical shape), or their combination. The formation mechanism of minerals filling cavities in pyroclastics is not entirely clear.

Project(s):

Archive of Ocean Data (ARCOD)

Coverage:

Median Latitude: 39.125667 * Median Longitude: 138.667333 * South-bound Latitude: 38.836000 * West-bound Longitude: 138.526000 * North-bound Latitude: 39.488000 * East-bound Longitude: 138.929000

Event(s):

MMDBS-02-1895 * Latitude: 39.053000 * Longitude: 138.547000 * Location: Sea of Japan * Method/Device: Grab (GRAB)

MMDBS-02-1912 * Latitude: 38.836000 * Longitude: 138.526000 * Location: Sea of Japan * Method/Device: Dredge (DRG)

MMDBS-02-77100 * Latitude: 39.488000 * Longitude: 138.929000 * Location: Sea of Japan * Method/Device: Gravity corer (GC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Sample code/label	Sample label		Markov, Yu D
5	Sample type	Samp type		Markov, Yu D
6	Silicon dioxide	SiO2	%	Markov, Yu D	Wet chemistry
7	Aluminium oxide	Al2O3	%	Markov, Yu D	Wet chemistry
8	Iron oxide, Fe2O3	Fe2O3	%	Markov, Yu D	Wet chemistry
9	Titanium dioxide	TiO2	%	Markov, Yu D	Wet chemistry
10	Manganese oxide	MnO	%	Markov, Yu D	Wet chemistry
11	Magnesium oxide	MgO	%	Markov, Yu D	Wet chemistry
12	Calcium oxide	CaO	%	Markov, Yu D	Wet chemistry
13	Sodium oxide	Na2O	%	Markov, Yu D	Wet chemistry
14	Potassium oxide	K2O	%	Markov, Yu D	Wet chemistry
15	Phosphorus pentoxide	P2O5	%	Markov, Yu D	Wet chemistry
16	Water in rock	H2O	%	Markov, Yu D

License:

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

Size:

52 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Sample label	5 Samp type	6 SiO2 [%]	7 Al2O3 [%]	8 Fe2O3 [%]	9 TiO2 [%]	10 MnO [%]	11 MgO [%]	12 CaO [%]	13 Na2O [%]	14 K2O [%]	15 P2O5 [%]	16 H2O [%]
MMDBS-02-1895	39.053	138.547	1895	round and irregular green grains (compositionally similar to celadonite)	43.84	5.13	24.43	0.20	0.26	3.42	2.55	0.77	5.82	0.05	13.53
MMDBS-02-1912	38.836	138.526	1912	round and irregular green grains (compositionally similar to celadonite)	43.35	4.77	25.86	0.33	0.02	3.19	2.36	0.93	5.93	0.62	12.64
MMDBS-02-1912	38.836	138.526	1912/1	pseudomorphs after diatoms and radiolarians (compositionally similar to glauconite)	52.21	4.64	22.01	0.20	0.04	0.73	0.04	0.77	5.02	0.26	14.22
MMDBS-02-77100	39.488	138.929	77100	round and irregular green grains (compositionally similar to celadonite)	43.39	5.74	25.86	0.33	0.03	2.87	2.48	0.95	5.91	0.64	11.80