Citation:

minmag.1986.050.357.21

Name: Chemical composition of the chalcophanite rich surface of an encrusted rock ashore Lake Macquarie, Australia
Creator: J Ostwald
Published: 1986
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Mineralogical interest in the nature of manganese oxide particulates in natural marine water (Suess, 1979), natural lake water (Klaveness, 1977), and simulated lake water (Giovanoli, 1980), prompted a search for such particulates in a large New South Wales coastal lake. The investigated waters did show the existence of manganese oxide replacement phenomena in fragmentary sedimentary rocks near the south margin of Lake Macquarie. The black crusts of manganese oxide discovered on rocks close to the waterline have revealed a three layers structure. Layer A (0-35 micron), adjacent to the rock, is composed essentially of kaolinite of weathering origin, together with low levels of manganese oxide without detectable Zn. Layer B (35-80 micron) follows as a manganese oxide layer containing admixed kaolinite and low amounts of Zn. Layer C (80-130 micron) is the closest to the surface and is made of Chalcophanite containing 10-15% of ZnO.

Source:

Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT

Further details:

Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN

Project(s):

NOAA and MMS Marine Minerals Geochemical Database (NOAA-MMS)

Coverage:

Latitude: -33.083300 * Longitude: 151.583300

Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m

Event(s):

Lake_Macquarie_O * Latitude: -33.083300 * Longitude: 151.583300 * Elevation: 0.0 m * Location: Lake Macquarie, New South Walters, Australia

Comment:

From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Identification	ID		Ostwald, J
2	DEPTH, sediment/rock	Depth sed	m	Ostwald, J		Geocode
3	Manganese dioxide	MnO2	%	Ostwald, J	Electron Probe Microanalysis (EPMA)
4	Zinc oxide	ZnO	%	Ostwald, J	Electron Probe Microanalysis (EPMA)
5	Iron oxide, Fe2O3	Fe2O3	%	Ostwald, J	Electron Probe Microanalysis (EPMA)
6	Aluminium oxide	Al2O3	%	Ostwald, J	Electron Probe Microanalysis (EPMA)
7	Silicon dioxide	SiO2	%	Ostwald, J	Electron Probe Microanalysis (EPMA)
8	Water in rock	H2O	%	Ostwald, J	Calculated

License:

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

Size:

61 data points

Data

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

1 ID	3 MnO2 [%]	4 ZnO [%]	5 Fe2O3 [%]	6 Al2O3 [%]	7 SiO2 [%]	8 H2O [%]
Lake_Macquarie_O-1	70.6	16.3	0.3		0.6	12.4
Lake_Macquarie_O-2	72.0	14.2	0.3	0.2		13.3
Lake_Macquarie_O-3	70.2	17.1	0.6	0.3		11.8
Lake_Macquarie_O-4	70.7	15.6	0.2	0.3		13.2
Lake_Macquarie_O-5	67.5	17.3	0.1	1.1	1.4	12.6
Lake_Macquarie_O-6	69.2	16.5		1.3	1.6	11.4
Lake_Macquarie_O-7	72.4	12.8		0.6		14.2
Lake_Macquarie_O-8	67.7	18.3	0.4	0.4		13.2
Lake_Macquarie_O-9	71.3	15.6	0.6	0.1	0.1	12.3
Lake_Macquarie_O-10	69.4	17.3		0.2	0.7	12.4