lead isotopes galena

Lead isotopes in galena from the Cyclades can be separated into two distinct regional metal sources, which correspond with known and proposed tectono …

Galena lead isotope data from 3 groups of deposits in the Omineca crystalline belt can be interpreted in terms of mixing of lead from 2 contrasting sources, both of which follow simple growth ...

Patterns of lead isotope variation from the center to the edge of galena crystals can be correlated for distances up to 200 m.Our lead isotope data, together with earlier data for …

Lead is chemically isolated from other elements by cation exchange chromatography, except when it is extracted from galena where it represents 82 % of the mineral. Lead isotope ratios have been measured by thermal ionization mass spectrometry (TIMS) or by multi-collector inductively coupled mass spectrometry (MC-ICPMS) .

The initial Pb isotope composition of an ore fluid is best determined from Pb-rich minerals genetically associated with the mineralizing event, e.g., galena (initial U/Pb = 0) [6][7][8] [9] [10 ...

Heterogenous rock assemblages of mixed provenance and age account for the differences in lead isotopes. Whereas the base metals and silver are ultimately sourced from the basement, the precious metals might be derived from the metasomatized lithospheric mantle. ... New galena Pb-isotope data collected by laser ablation inductively coupled ...

Finally, lead isotopes can be used as empirical vectors to ore both at the camp to deposit scale, using a range of media ranging from galena in minor …

Based on lead isotope data, it has been shown that lead in the Beishan stratabound sphalerite-pyrite deposit came mainly from the oldland and its underlying basement rocks and, subordinately, the ...

The purpose of this study is to investigate the differences in sources of discrete four zones that are represented by the lead isotope map of metal mines using galena samples. The lead isotope map has been constructed based on 119 galena samples from 38 metal mines in the southern Korean Peninsula, together with previously …

Abstract. A large crystal of lead sulfide from Picher, Oklahoma, has significant differences in isotopic composition of lead in successive growth zones. Lead isotope ratios in the …

Galena lead isotope clusters define three main groups of deposits. These three groups appear to be related to three mineralizing events, dated by K–Ar and Ar/Ar, in the Late Jurassic (group 3 ...

As a test, Barnes et al. compared the lead isotope ratios of galena (PbS, lead sulfide) with those of (1) the lead smelted from it, (2) litharge (PbO) prepared from the smelted lead, and (3) a K 2 O-PbO-SiO 2 glass and a yellow pigment (Pb 2 Sb 2 O 7) prepared from the same lead. They reported no difference in any of the measured ratios, …

@article{osti_5565540, title = {Lead isotope identification of sources of galena from some prehistoric Indian sites in Ontario, Canada}, author = {Farquhar, R M and Fletcher, I R}, abstractNote = {Lead isotopic compositions of 12 galenas from five late Archaic-initial Woodland grave and habitation sites in southern Ontario have made it possible to …

Lead isotope abundance studies on galena occurrences in Norway. Norsk. Geologisk Tidsskrift. 1963; 43: 283–344. 41. Liu R, Rawson J, Pollard AM. Beyond ritual bronzes: identifying multiple ...

remote showings, are urged to submit them to the authors. These involve galena lead isotope analysis and interpretation ~~~~~,~~~~l~ 250 galena have been of mineralization from deposits in the Ro'ssland Group (with histories, continue ongoing projects, and provide prelimin. batholith (with D.A. Brouln and J.M. Logan). results

Sulfur, oxygen, carbon, and strontium isotope geochemistry of the Sarrabus-Gerrei mining district, southeastern Sardinia, Italy Economic Geology Textural and fluid inclusion evidence for ore deposition in the Pb-Zn deposit at Laisvall, Sweden

Lead isotope ratios from galena in ore deposits of the Eastern, Southern and Central Alps yield groupings that correspond to different types of deposits and to their tectonic setting. In spite of the metamorphic nature of many of the deposits the pattern reflects roughly the chronological sequence of the periods of ore formation.

Galena lead isotope data from 3 groups of deposits in the Omineca crystalline belt can be interpreted in terms of mixing of lead from 2 contrasting sources, both of which follow simple growth ...

The three linear clusters of galena lead isotope data, groups 1 to 3, re¯ect di erences in the tectono-magmatic evolution and geology of the deposits sampled in the Group 2 AyseÂn region. Similar clustering of lead isotopes to de- ®ne fundamental geologic provinces has been observed Group 2 deposits are associated most closely with epi- in ...

8 Feb 1980. Vol 207, Issue 4431. pp. 640 - 643. DOI: 10.1126/science.207.4431.640. Abstract. Lead isotopic compositions of 12 galenas from five late Archaic-initial …

Lead isotope characterization of galena ores from the South China Block (SCB) and major metallogenic belts within. (A) Ternary diagram showing the isotopic fields of the Lower and Upper Yangtze province, Cathaysia, and Jinshachang Pb-Zn deposit. Jinshachang belongs to the Mississippi Valley Type (MVT) ore cluster in Northeast Yunnan.

The methodology of creating the Oxford lead isotope database (OXALID) is outlined and a summary is given of the lead isotope resource provided by OXALID. ... Hart SR, Shimizu N, Sverjensky DA (1981) Lead isotope zoning in galena: an ion microprobe study of a galena crystal from the Buick mine. Southeast Missouri, Economic Geology …

Galena is the most abundant lead mineral, has been mined for millennia, and remains our major source of that metal. It is a metallic, lead-gray mineral with cubic cleavage and a distinctly high density that makes galena samples feel much 'heavier' than expected for their size. Because it melts at a relatively low temperature and is so ...

Doe, B. R., Lead Isotope Data Bank, Lead Isotopes and Ore Deposits Project (1975). Google Scholar. FLETCHER, I.R., THESIS U TORONTO (1979). ... THWAITES, R. G., Notes on early lead mining in the Fever (or Galena) River region, WISCONSIN HISTORICAL COLLECTIONS 13: 271 (1895). Google Scholar. Submit a Response to …

Ion microprobe techniques have been used to determine the variations of Pb isotope ratios within a single octahedral crystal of galena from the Buick mine, southeast Missouri. The crystal shows uniform concentric zonation of Pb isotope ratios, with a total variation of approximately 3 percent in 208 Pb/ 206 Pb and approximately 4 percent in 207 Pb/ 206 …

Using high precision analytical techniques Stacey et al.2 redetermined the single stage growth curve and found that galena samples ranging in age from 0 to 3,100 m.y. fit a …

Analyses of lead isotopes in galena in carbonate rock ore deposits collected from several mineralized districts in the Central and Eastern Interior of the United States support previous studies in ...

From these samples, two pyrite, one pyrrhotite, two sphalerite and two galena separates were hand-picked under a binocular microscope for subsequent bulk-mineral lead isotope analyses (see below). Seventeen polished thick sections (with thicknesses of 5–15 mm) of the sulfide samples were made for in situ trace element and sulfur-lead …