The similarity of the 206Pb/204Pb-isotope ratios of galena from Lavrion and Milos suggests a common metal source underlies both regions, the Lower Cycladic Nappe, which contributed to the shallow crustal deposits in the western Cyclades and was accessible since the Late Miocene. In contrast, a mixture of more primitive metal sources, the Upper ...

This study presents a comprehensive database (n = 215) of lead isotopes in galena from the southern Korean peninsula using new and published data. Of the 69 metal mines examined, predominantly skarn- and hydrothermal-type Pb–Zn–Au–Ag–Cu deposits were observed and were associated with Mesozoic magmatic activities. Galena samples …

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 ...

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 …

The isotopic ratios of Pb have been determined from 33 galena samples collected from a variety of occurrences in the north Eifel and north Sauerland. On the basis of the data presented, it is not possible to distinguish between the isotopic characteristics of galena-Pb from veins, carbonate cavity-filling and sandstone-hosted disseminated mineralisation in …

Lead isotope ratios of galena from the carbonate-hosted massive sulphide deposits of Kabwe (Pb-Zn) and Tsumeb (Pb-Zn-Cu) in Zambia and Namibia, respectively, have been measured and found to be homogeneous and characteristic of upper crustal source rocks. Kabwe galena has average isotope ratios of 206/204Pb = 17.997 ± 0.007, 207/204Pb = …

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.

Interpretation of Galena Lead Isotopes from Texada Island* (92F) Colin Godwin. 2000. See Full PDF Download PDF. See Full PDF Download PDF. Related Papers ...

The lead isotope data for 18 galena samples and 18 ones of δ34S isotope data (including galena and pyrite samples) were collected from lead-zinc ore deposits in some areas in the Khau Loc zone ...

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 ...

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 ...

Similarities between the Pb-isotopic signature of galena and regional host rocks suggest, that the pre-Alpine Cycladic Basement was the main source of lead for the deposits in the north and ...

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 …

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 ...

The lead isotope map has been constructed based on 119 galena samples from 38 metal mines in the southern Korean Peninsula, together with previously …

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 ...

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 ...

5.2.1 Ore lead. The Pb isotope compositions of galena and sphalerite in the Baiyinnuoer deposit are similar and homogeneous. A slightly more radiogenic Pb isotopic composition is evident in sulfide samples than that of the other rock samples at Baiyinnuoer.

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 …

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 …

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 …

Abstract. 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, …

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 …

@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 …

55 galena samples from 18 deposits. Volcanite-hosted deposits have a less radiogenic lead isotope composition than sediment-hosted deposits, while galena in quartz segregations and crack fillings shows the most pronounced radiogenic lead isotope composition.

The lead isotope data for 18 galena samples and 18 ones of δ34S isotope data (including galena and pyrite samples) were collected from lead-zinc ore deposits in some areas in the Khau Loc zone ...

Lead isotopes in galena from the Cyclades can be separated into two distinct regional metal sources, which correspond with known and proposed tectono-metamorphic units and can be used as a tracer of the underlying basement in the Cyclades. The unique crustal exposures of the region provide an important opportunity to …

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, …

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 …