First Data on the Isotopic Age of Zircons from Rocks of the Roseta Ultramafic Massif, Southern Margin of the SAo Francisco Craton (Brazil)

被引：0
|
作者：
Lesnov, F. P. [1 ]
Pinheiro, M. A. P. [2 ]
Sergeev, S. A. [3 ]
机构：
[1] Russian Acad Sci, Siberian Branch, Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia
[2] Geol Survey Brazil, Belo Horizonte, MG, Brazil
[3] Karpinskii Russian Geol Res Inst, St Petersburg 199106, Russia
来源：
DOKLADY EARTH SCIENCES | 2018年 / 483卷 / 02期
关键词：
COLLAGE;
D O I：
10.1134/S1028334X1812005X
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The results of isotope U-Pb dating of zircons from lherzolite and vein olivine orthopyroxenite composing the Roseta ultramafic massif are presented. The zircons differ in their morphological, optical, and geochemical properties and in their age. Lherzolite samples that are almost deprived of cathodoluminescence are represented by two age clusters 788 +/- 15 and 638.2 +/- 5.4 Ma. The zircons from the first cluster are relict. A later event recorded in the zircons from the second cluster was manifested in an intense metamict mineral transformation. The age of the zircons from vein olivine orthopyroxenite conforms to 608.9 +/- 3.4 Ma. These zircons are considered to be syngenetic; therefore, their age is determined by the time of crystallization of olivine orthopyroxenites.
引用
收藏
页码：1510 / 1514
页数：5
相关论文
共 50 条
  • [1] First Data on the Isotopic Age of Zircons from Rocks of the Roseta Ultramafic Massif, Southern Margin of the São Francisco Craton (Brazil)
    F. P. Lesnov
    M. A. P. Pinheiro
    S. A. Sergeev
    Doklady Earth Sciences, 2018, 483 : 1510 - 1514
  • [2] Geochemistry and Isotopic Age of Zircons from Rocks of Ultramafic Massifs in the Southern Folded Framing of the Sao Francisco Craton (Southeastern Brazil)
    Lesnov, F. P.
    Pinheiro, M. A. P.
    Sergeev, S. A.
    Medvedev, N. S.
    RUSSIAN GEOLOGY AND GEOPHYSICS, 2019, 60 (05) : 473 - 491
  • [3] Regional high-grade metamorphic peak imprint in zircons from the mafic-ultramafic Jacurici Complex, Sao Francisco Craton, Brazil
    Vargas Pilla Dias, Joao Rodrigo
    Marques, Juliana Charao
    Bertolini, Gabriel
    Frantz, Jose Carlos
    Friedrich, Betina
    da Silva Paim, Jhenifer Caroline
    Sobrinho da Silveira, Carlos Jose
    Alves Queiroz, Waldemir Jose
    BRAZILIAN JOURNAL OF GEOLOGY, 2022, 52 (01)
  • [4] Rhyacian evolution of subvolcanic and metasedimentary rocks of the southern segment of the Mineiro belt, Sao Francisco Craton, Brazil
    Avila, Ciro Alexandre
    Teixeira, Wilson
    Bongiolo, Everton Marques
    Dussin, Ivo Antonio
    Teixeira Vieira, Thayla Almeida
    PRECAMBRIAN RESEARCH, 2014, 243 : 221 - 251
  • [5] The southern Sao Francisco Craton puzzle: Insights from aerogeophysical and geological data
    Dantas de Araujo, Alinne Jessica
    Bongiolo, Everton Marques
    Avila, Ciro Alexandre
    JOURNAL OF SOUTH AMERICAN EARTH SCIENCES, 2019, 94
  • [6] Proterozoic microfossils from subsurface siliciclastic rocks of the Sao Francisco Craton, south-central Brazil
    Simonetti, C
    Fairchild, TR
    PRECAMBRIAN RESEARCH, 2000, 103 (1-2) : 1 - 29
  • [7] Isotopic signatures of Paleoproterozoic granitoids from the southern Sao Francisco Craton and implications for the evolution of the Transamazonian Orogeny
    Noce, CM
    Teixeira, W
    Quéméneur, JJG
    Martins, VTS
    Bolzachini, É
    JOURNAL OF SOUTH AMERICAN EARTH SCIENCES, 2000, 13 (03) : 225 - 239
  • [8] Geochemistry and provenance of siliciclastic rocks from the Mesoproterozoic Upper Vazante Sequence, Brazil: Insights on the evolution of the southwestern margin of the Sao Francisco Craton and the Columbia Supercontinent
    Fernandes, Neil A.
    Olivo, Gema R.
    Layton-Matthews, Daniel
    Voinot, Alexandre
    Chipley, Donald
    Diniz-Oliveira, Gustavo
    PRECAMBRIAN RESEARCH, 2019, 335
  • [9] Insights into orogenic processes from drab schists and minor intrusions: Southern Sao Francisco Craton, Brazil
    Moreira, Hugo
    Cassino, Lucas
    Lana, Cristiano
    Storey, Craig
    Albert, Capucine
    LITHOS, 2019, 346
  • [10] Sedimentary and U-Pb detrital zircons provenance of the Paleoproterozoic Piracicaba and Sabara groups, Quadrilatero Ferrifero, Southern Sao Francisco craton, Brazil
    Dutra, Luiz Fernandes
    Martins, Maximiliano
    Lana, Cristiano
    BRAZILIAN JOURNAL OF GEOLOGY, 2019, 49 (02)
12345