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3 edition of Pb-isotope data base for sulfides from Alaska, March, 1987 found in the catalog.

Pb-isotope data base for sulfides from Alaska, March, 1987

S. E. Church

Pb-isotope data base for sulfides from Alaska, March, 1987

by S. E. Church

  • 145 Want to read
  • 10 Currently reading

Published by U.S. Dept. of the Interior, Geological Survey, [Books and Open-File Reports Section, distributor] in [Denver, CO] .
Written in English

    Subjects:
  • Sulfides -- Alaska.,
  • Radioactive dating -- Alaska.

  • Edition Notes

    Statementby S.E. Church, M.H. Delevaux, and J.E. Gray.
    SeriesOpen-file report -- 87-259, U.S. Geological Survey open-file report -- 87-259..
    ContributionsDelevaux, Maryse Helen, 1928-, Gray, J. E.
    The Physical Object
    FormatMicroform
    Pagination44 p.
    Number of Pages44
    ID Numbers
    Open LibraryOL17108859M

    It is suggested that mixing between enriched and depleted mantle materials during the past m.y. produced the heterogeneous proto-Eifel source. The mixing event may have occurred in conjunction with Tertiary magmatism in central Europe. Isotopic data from 31 mafic and 33 basic lavas are presented. Notes: n/a. Website. DOI: /x. The applicability and limitations of sulphur isotope ratio as a nuclear forensic signature have been studied. The typically applied leaching methods in uranium mining processes were simulated for five uranium ore samples and the n(34 S)/n(32 S) ratios were measured. The sulphur isotope ratio variation during uranium ore concentrate (UOC) production was also followed using two real-life sample Cited by: 5.

    DeepDyve is the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. DeepDyve is the easiest way to get instant access to the academic journals you need. Climatic data indicate that Alaska is currently warming at a rate of about ºC per century. Data has been obtained which shows that the discontinuous permafrost south of the Yukon River in Alaska has recently warmed by as much as ºC and that some of it is already thawing.

    API used data from a survey to calculate relationships between production Management of Exploration, Development and Production Wastes Section 3: Industry Overview metrics (e.g., volume of oil produced) and the volume of waste generated. Dewan, Nitika, "Source Apportionment of Atmospheric Particulate Matter in Developing Countries Using Trace Elements and Stable Metal Isotope Ratios" (). Electronic Theses and Dissertations. This Dissertation is brought to you for free and open access by the Graduate Studies at Digital Commons Author: Nitika Dewan.


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Pb-isotope data base for sulfides from Alaska, March, 1987 by S. E. Church Download PDF EPUB FB2

Get this from a library. Pb-isotope data base for sulfides from Alaska, March, [S E Church; Maryse Helen Delevaux; John E Gray]. The Pb isotope database for sulfide deposits and occurrences in the Western United States was funded by the Mineral Resources Program, U.S.

Geological Survey (USGS). Reports on Pb isotope data from Alaska were published in Church and others (a) and Gaccetta and Church (). The primary objectives of the project were three-fold.

Pb isotope geochemistry of stratabound Zn-Pb(-Ag-Au-Ba-F) deposits and occurrences in the Nome Complex, Seward Peninsula, Alaska: Metal sources and regional comparisons. Sulfide Deposit, Admiralty Island, Southeastern Alaska. By Cliff D.

Taylor, Wayne R. Premo, and Craig A. Johnson. S versus Pb/ Pb and Pb/Pb isotopic data for ores and sulfides in the Greens Creek deposit and for sulfides from Late Triassic and 3. Uranium-thorium-lead (U-Th-Pb) isotope data, sample locations, Size: 1MB. Pb-isotope signatures of Devonian-Mississippian massive sulphide deposits in Alaska and their significance to mineral exploration.

Vertical best-fit line through data with correlated. Ag-Pb-Zn vein-breccias are found in the Endicott Group. Galena formed during the main mineralization stages in the Red Dog deposits and from the Anarraaq and Wulik deposits have overlapping Pb isotope compositions in the range Pb/Pb = toPb/Pb = toand Pb/Pb = to We report Pb isotope ratios of sulfides deposited at seven recently active mid-ocean ridge (MOR) hydrothermal vents.

Sulfides from three sediment-starved sites on the Juan de Fuca Ridge contain Pb with isotope ratios identical to their local basaltic by: Geochima eCosraochimica Acta, S'n^.

Voi. to Pergamon Press. Printed in Great Britain Pb and Sr isotopes in volcanic rocks from the Aleutian Islands and Pribilof Islands, Alaska R. KAY Department of Geological Sciences, Cornell University, Ithaca, NYU.S.A. S.-S. SUN Department of Geology and Mineralogy, University of Adelaide, South Australia and C.-N.

LEE-HU Cited by: Chemical Geology, 68 () Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands [3] METALLOGENESIS AT PALEO-SPREADING CENTERS: LEAD ISOTOPES IN SULFIDES, ROCKS AND SEDIMENTS FROM TH'E TROODOS OPHIOLITE (CYPRUS)* 1 BRUNO HAMELIN.2, BERNARD DUPRE, OLIVIER BRI~VART*~ and CLAUDE J.

ALLt~GRE Laboratoire de Cited by: The Pb isotope data for the samples of snowpack indicate that atmospheric pollution in this region of North America is dominated solely by a mixture of anthropogenic emissions from US ( Pb/ Pb ca.

) and Canadian ( Pb/ Pb ca. RAW DATA FILE U-Pb AND Lu-Hf ISOTOPE, AGE, AND TRACE-ELEMENT DATA FROM ZIRCONS AT FOUR SITES IN THE WESTERN ALASKA RANGE AND TALKEETNA MOUNTAINS, ALASKA Erin Todd, Andrew Kylander-Clark, Alicja Wypych, Evan Twelker, and Karri R.

Sicard $ THIS REPORT HAS NOT BEEN REVIEWED FOR TECHNICAL CONTENT. The Bidjovagge gold-copper deposit (69°17'N, 22°29'E) occurs in the north-south trending Proterozoic Kautokeino greenstone belt.

The greenstone belt consists of shallow marine sediments and mafic to ultramafic volcanites, which are intruded by diabase sills and granitoids. The sequence can be correlated with the to Ma Kiruna greenstone belt.

Svecokarelian intrusions took place in Cited by: A concordia plot of the whole-rock lead data shows that many of the rocks lost lead relative to uranium and thorium during the interval to m.y. ago. Similar ores might be sought between the northern Wisconsin metavolcanic belt and the Upper Mississippi Valley because the lead lost from the basement there might be available for ore Cited by: The most probable source of Pb contamination in the perennial reach of Aravaipa Creek, Arizona, has been determined using Pb isotope ratios and total metals analyses of samples collected from the ephemeral and perennial reaches and mine wastes located in the Aravaipa Mining : O.

Morfin, M.H. Conklin, T.L. Corley, J.B. Hiskey, J. Ruíz. Helium isotope data of fluid inclusions trapped in sulfides indicate that He in the massive and bedded ores has a different origin than He in fluorite of granite-related veins. The 3He/4He ratios of – Ra of fluid inclusions from sulfides at Gaofeng and Changpo-Tongkeng imply a contribution of mantle-derived by: Accurate prediction of future climate scenarios is contingent on our understanding of past and present climate mechanisms.

This is done in part through the reconstruction of historical climate changes using proxy records from terrestrial and marine archives. Terrestrial archives covering the Holocene and late Pleistocene are limited, most acutely in the Southern by: Pb Isotope Analyses.

Pb isotopes in galena, sulfides, soils (excluding hydrocarbons)* $ Pb isotopes in archaeological alloys (metallic) $ Pb isotopes in total rock Pb, feldspars, etc.

$ * for analysis of hydrocarbons, call for details. U-Pb Isotope Analyses. and trace element abundance and Nd–Sr–Pb isotope compositions of these samples will be used to char-acterize the source components and mantle processes for these basalts.

In addition, isotope data for these Fig. Major element compositions of Cenozoic basalts from SE China. Introduction Lead (Pb) isotopic abundances exhibit the greatest natural variation of any element. This is because three of the four stable isotopes of lead (Pb, Pb and Pb) are mainly derived from the radioactive decay of other elements (U, U and Th respectively).As a.

Sturges, W.T., and L.A. Barrie, Lead / isotope ratios in the atmosphere of North America as tracers of U.S. and Canadian emissions, Nature,Sept. Internet resources (return to top) Archaeotrace, Lead Isotope Analysis. Hf–Nd isotope data suggest that relative to Nd, little Hf is transferred to the mantle wedge via fluid.

Lavas from Seguam Island in the central Aleutian arc have distinctly elevated B/La, U/Th, 87 Sr/ 86 Sr, and Pb/ Pb ratios, which probably reflect a large volume of fluid released from serpentinized oceanic crust plus the overlying Cited by: ), much like Japanese arc rocks.

Basaltic rocks drilled in the Philippine Sea (DSDP Sites ) have similar 87Sr/86Sr ratios, and plot above the NHRL in Pb-Pb isotope plots. Arc lavas from both northeastern and central Japan form linear trends on Pb-Pb plots from moderately depleted MORB toward the sediment field. 87Sr/86Sr ratios.Radiometric Dating and Lead Isotopes Lab Procedure Part 2, concentration calculations 1.

The data are given in a spreadsheet on the Geochemistry web page: Pb-Pb_data. The data values are in ion counts per second. The ICP-MS computer has already corrected the data for detector dead time.

2. Blank correction (remove background).File Size: 36KB.