メキシコ共和国Sierra Madre Oriental北部の鉱化作用の特性について II  鉱床編

DOI

書誌事項

タイトル別名
  • On the characteristics of mineralization in the northern part of Sierra Madre Oriental, Mexico(Part 2, Ore deposits)

抄録

In the northern part of Sierra Madre Oriental, lead-zinc deposits occur in a thick sequence of Mesozoic calcareous sediments, which are folded and faulted by the Laramide orogeny. The ore deposits are divided into two groups, non-alteration(or partly marmorization)-type and skarn-type, depending upon the alteration status of the country rock. The former group, typified by such deposits as Plomosas and Dos Marias, consists of the manto-type orebodies in the Jurassic and Cretaceous calcareous sediments with no distinct alteration, being characterized by very simple ore metal association, Fe, Zn and Pb with low concentration of Ag. On the contrary, the latter group of deposits such as Santa Eulalia, Naica and La Encantada are composed of the chimney, manto and vein-type orebodies with skarn minerals. They have been found in the lower Cretaceous Aurora limestone with dome structure. Their ore metals are mainly Fe, Zn, Pb, Cu and As, being associated with minor amounts of Ag, W, Mo, So and Sb. Both groups of mineralization have calcite, dolomite, fluorite, gypsum, anhydrite, barite and quartz as the gangue minerals. In general, the conspicuous intrusive bodies as the possible source of the mineralization are scarecely recognized in the ore field concerned, although discontinuous exposures of dikes and sills of felsite and small stocks of diorite have been known.

収録刊行物

  • 鉱山地質

    鉱山地質 31 (165), 27-42, 1981

    資源地質学会

詳細情報 詳細情報について

  • CRID
    1390001206525309184
  • NII論文ID
    130003639560
  • DOI
    10.11456/shigenchishitsu1951.31.27
  • ISSN
    00265209
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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