DISTRIBUTION AND ORIGIN OF NOBLE-GASES IN MAGNETITES FROM THE PRECAMBRIAN BANDED IRON-ORE FORMATIONS

被引：0
|
作者：
VERKHOVSKY, AB
MARKOV, MS
SHUKOLYUKOV, YA
SHCHIPANSKY, AA
SEMENOVA, LF
机构：
来源：
GEOKHIMIYA | 1991年 / 01期
关键词：
D O I：
暂无
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Under study were contents and isotopic composition of noble gases in magnetites from jaspilites of various age from 550 to 3.250 m. y. of mostly sedimentary (Kursk magnetic anomaly, Minor Khingan) and volcanic-sedimentary (Intermediate Near - Dnepr, Kola peninsula, Karelia) origin. Magnetic separation with subsequent manual extraction of pure magnetite with binocular microscope was used. A value of Ar-40/Ar-36 of all studied samples evidences on presence of radiogenic Ar. Its percentage varies from 36 to about 100%. Isotopic composition of Xe does not differ from the atmospheric one. He-3/He-4 ratio determined in one of the samples from Kursk magnetic anomaly corresponds practically to pure radiogenic helium (1.4 x 10(-8)). Radiogenic gases are mostly captured but some part of them was generated in situ. Besides radiogenic gases in magnetites are present atmospheric ones supplied by the meteoric waters. Distribution of nonradiogenic noble gases in magnetites of the skarn and carbonatite types is close to that observed in magnetites from jaspilites.
引用
收藏
页码：15 / 26
页数：12
相关论文
共 39 条
  • [31] Implicating the Origin and Depositional Environment of Banded Iron Formation (BIF) of Bonai-Keonjhar Iron Ore Belt in Eastern India from its Petrography and Geochemistry
    Nanda, S. K.
    Beura, D.
    GEOLOGY OF ORE DEPOSITS, 2021, 63 (06) : 497 - 514
  • [32] Geochemical Constraints on the Origin of Banded Iron Formation-Hosted Iron Ore from the Archaean Ntem Complex (Congo Craton) in the Meyomessi Area, Southern Cameroon
    Ganno, Sylvestre
    Tsozue, Desire
    Nono, Gus Djibril Kouankap
    Tchouatcha, Milan Stafford
    Ngnotue, Timoleon
    Takam, Ruth Gamgne
    Nzenti, Jean Paul
    RESOURCE GEOLOGY, 2018, 68 (03) : 287 - 302
  • [33] Geochemistry and origin of the banded Iron formations (BIFs) from the Western Dharwar craton, southern India: Implications for evolving redox conditions of Archean oceans
    Mukherjee, Aindrila
    Mudlappa, Jayananda
    Nasipuri, Pritam
    Aadhiseshan, K. R.
    Satyanarayanan, M.
    GEOCHEMISTRY, 2025, 85 (03):
  • [34] Petrology and geochemistry of the banded iron-formations from Ntem complex greenstones belt, Elom area, Southern Cameroon: Implications for the origin and depositional environment
    Sylvestre, Ganno
    Timoleon, Ngnotue
    Djibril, Kouankap Nono Gus
    Paul, Nzenti Jean
    Marianne, Notsa Fokeng
    CHEMIE DER ERDE-GEOCHEMISTRY, 2015, 75 (03) : 375 - 387
  • [35] Precambrian iron formations from the Cauvery Suture Zone, Southern India: Implications for sub-marine hydrothermal origin in Neoarchean and Neoproterozoic convergent margin settings
    Yellappa, T.
    Chetty, T. R. K.
    Santosh, M.
    ORE GEOLOGY REVIEWS, 2016, 72 : 1177 - 1196
  • [36] Neoarchean Algoma-type banded iron formations from Eastern Hebei, North China Craton: SHRIMP U-Pb age, origin and tectonic setting
    Han, Chunming
    Xiao, Wenjiao
    Su, Benxun
    Chen, Zhengle
    Zhang, Xiaohui
    Ao, Songjian
    Zhang, Jien
    Zhang, Zhiyong
    Wan, Bo
    Song, Dongfang
    Wang, Zhongmei
    PRECAMBRIAN RESEARCH, 2014, 251 : 212 - 231
  • [37] Interpretations and implications of LA ICP-MS analysis of chert for the origin of geochemical signatures in banded iron formations (BIFs) from the Meadowbank gold deposit, Western Churchill Province, Nunavut
    Gourcerol, B.
    Thurston, P. C.
    Kontak, D. J.
    Cote-Mantha, O.
    CHEMICAL GEOLOGY, 2015, 410 : 89 - 107
  • [38] Interpretations and implications of LA ICP-MS analysis of chert for the origin of geochemical signatures in banded iron formations (BIFs) from the Meadowbank gold deposit, Western Churchill Province, Nunavut (Vol 449, P 270, Y 2017)
    Gourcerol, B.
    Thurston, P. C.
    Kontak, D. J.
    Cote-Mantha, O.
    CHEMICAL GEOLOGY, 2017, 449 : 270 - 270
  • [39] Corrigendum to “Interpretations and implications of LA ICP-MS analysis of chert for the origin of geochemical signatures in banded iron formations (BIFs) from the Meadowbank gold deposit, Western Churchill Province, Nunavut” (Chemical Geology (2015) 410 (89–107), S0009254115002958, 10.1016/j.chemgeo.2015.06.008)
    Gourcerol, B.
    Thurston, P.C.
    Kontak, D.J.
    Côté-Mantha, O.
    Chemical Geology, 2017, 449
1234