The distribution of volatile and metallic elements in the Macquarie Island glasses and melt inclusions
Entry ID:
ASAC_1073_1142
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Summary
Abstract:
Primary sulfur abundances and the oxidation state of sulfur in the Macquarie Island glasses and melt inclusions: implications for the sulfur budget during seafloor alteration. The distribution of volatile and metallic elements in the Macquarie Island glasses and melt inclusions: Implications for fractional crystallisation and degassing during seafloor basaltic magmatism. Macquarie Island ... basaltic glasses and melt inclusions represent the products of mantle melting, crystal fractionation and degassing in mid-ocean ridge environment. State-of-art analytical techniques will be employed to quantify systematics of volatile and ore-forming elements in different magmatic processes. Implications for the origin of seafloor massive sulphide deposits are expected.
1. Spreadsheet &MacIsl-glasses& contains chemical analyses of the Macquarie Island glasses rows 4-8 - radiogenic isotope ratios (Nd, Sr, Pb) - see analytical details in Kamenetsky, V.S., and Maas, R., 2002, Mantle-melt evolution (dynamic source) in the origin of a single MORB suite: a perspective from magnesian glasses of Macquarie Island: Journal of Petrology, v. 43, p. 1909-1922.
rows 10-25 - major petrogenetic elements in weight %.
rows 29-57 and 60-83 - trace elements in ppm (parts per million).
2. Spreadsheet &MI_in_Sp&contains chemical analyses (major elements + chlorine + sulfur) of homogenised and quenched melt inclusions in chromites from Macquarie Island picrites. The concentrations are in weight %.
3. Spreadsheet &MI_in_Sp-GEO& contains compositions (trace elements by SIMS) of homogenised and quenched melt inclusions in chromites from Macquarie Island picrite #38277
rows 3-16 - major petrogenetic elements in weight %.
rows 19-43 - trace elements in ppm (parts per million).
The specific equipment used to analyse the data were
1. Electron microprobes Cameca SX-50 (University of Tasmania) and JEOL Superprobe 8200 (Max-Planck-Institut fur Chemie, Mainz, Germany);
2. Fourier-transform infrared spectroscopy (University of Tasmania);
3. Laser-ablation inductively-coupled plasma mass-spectrometry (ANU, Canberra and CODES, University of Tasmania);
4. Secondary ion mass-spectroscopy, Cameca 3f ion probe (Institute of Microelectronics, Russia)
5. Finnigan MAT262 multicollector mass-spectrometer (La Trobe University, Melbourne)
The samples were collected from Macquarie Island. The exact position of the samples is shown on Fig. 1b in Kamenetsky, V.S., Everard, J.L., Crawford, A.J., Varne, R., Eggins, S.M., and Lanyon, R., 2000, Enriched end-member of primitive MORB melts: petrology and geochemistry of glasses from Macquarie Island (SW Pacific): Journal of Petrology, v. 41, p. 411-430.
The particular isotope stated was used to measure the element. Total elemental concentration is reported.
The fields in this dataset are:
SiO2
TiO2
Al2O3
FeO
MnO
MgO
CaO
Na2O
K2O
P2O5
Cl
S
Cr2O3
Potassium
Cesium
Lithium
Beryllium
Boron
Scandium
Titanium
Vandium
Gallium
Rubidium
Strontium
Yttrium
Zirconium
Niobium
Barium
Lanthanum
Cerium
Neodymium
Samarium
Europium
Gadolinium
Dysprosium
Erbium
Ytterbium
Lutetium
Tantalum
Thorium
Uranium
Chromium
Cobalt
Nickel
Copper
Zinc
Arsenic
Molybdenum
Cadmium
Tin
Antimony
Hafnium
Tantalum
Tungsten
Thallium
Lead
Bismuth 
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Description:
Download point for the data
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Geographic Coverage
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Spatial coordinates
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N: -54.0
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S: -55.0
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E: 159.0
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W: 158.0
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Temporal Coverage
Start Date:
1997-01-01
Stop Date:
2004-06-30
Quality
All the data are of good analytical quality.
Access Constraints
The data from this project are not yet publicly available.
Data Set Progress
COMPLETE
Distribution
Distribution Media:
ftp
Distribution Size:
672554 bytes
Distribution Format:
ArcInfo export format
Fees:
No fees
Distribution Media:
ftp
Distribution Size:
167606 bytes
Distribution Format:
SDTS
Fees:
No fees
Distribution Media:
ftp
Distribution Size:
136575 bytes
Fees:
No fees
Personnel
Role:
DIF AUTHOR
Phone:
(605) 355-4560
Email:
jewillia at usgs.gov
City:
Rapid City
Province or State:
South Dakota
Postal Code:
57702
Country:
USA
Role:
TECHNICAL CONTACT
Phone:
605-355-4560
Email:
jgallowa at usgs.gov
City:
Rapid City
Province or State:
South Dakota
Postal Code:
57702
Country:
USA
Publications/References
Driscoll, D.G., 1992, Plan of study for the Black Hills Hydrology Study, South
Dakota: U.S. Geological Survey Open-File Report 92-84, 10 p.
Creation and Review Dates
DIF Creation Date:
2003-06-09
Last DIF Revision Date:
2004-06-22
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