КАЛЬЦИЕВЫЕ АМФИБОЛЫ ИЗ ПОРОД ПОЛОСЧАТОЙ ЖЕЛЕЗОРУДНОЙ ФОРМАЦИИ КОЛЬСКОГО ПОЛУОСТРОВА
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dc.contributor.author | Иванюк Г.Ю. | |
dc.contributor.author | Пахомовский Я.А. | |
dc.contributor.author | Базай А.В. | |
dc.contributor.author | Яковенчук В.Н. | |
dc.contributor.author | Горяинов П.М. | |
dc.date.accessioned | 2022-12-03T09:10:07Z | |
dc.date.available | 2022-12-03T09:10:07Z | |
dc.date.issued | 2005 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=9142818 | |
dc.identifier.citation | Записки Российского минералогического общества, 2005, 134, 4, 56-70 | |
dc.identifier.issn | 0869-6055 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/40712 | |
dc.description.abstract | There were found magnesian and ferrous hornblendes, tschermakite and ferrotschermakite, magnesiosada-nagaite and pargasite, tremolite, actinolite and ferroactinolite among calcium amphiboles in rocks of banded iron-ore formation of Kola peninsula. Tremolite is the rock-forming mineral of hematite-magnetite quartzites and hydrothermal veins in biotite and aluminum gneisses; actinolite was detected in all types of ferrous quartzi-tes, in hornblende amphibolites, magnetite-diopside rocks and various hydrothermalites, ferroactinolite - in magnetite and sulfide-magnetite ferrous quartzites. Magnesian hornblende is the major mineral of hornblende amphibolites and various hydrothermalites, where tschermakite was also met; the ferrous hornblende is wide-spread secondary mineral of magnetite and sulfide-magnetite quartzites. In gabbroids, there are magnesian horn-blende, tschermakite, pargasite, ferrotschermakite and magnesiosadanagaite. Ore bodies have the characteristic zonality (from axial zone of their apical parts down to depth and to contact with biotite gneisses): hematite-mag-netite ferrous quartzites with talcum and tremolite - magnetite ferrous quartzites with actinolite and gruneri-te - sulfide-magnetite ferrous quartzites with grunerite, ferroactinolite and hedenbergite - skarnoids with acti-nolite, hornblende, biotite, epidope and garnets - magnetite-calcite-dolomite rocks with diopside and actinoli-te - nodular and two-mica gneisses. This zonality was developed, apparently, at first under action of an uprising deoxidized endogenic fluid at the progressive stage of metamorphism (formation of sulfide-magnetite and mag-netite zones), and then by means of reverse buffer reactions at the regressive stage (the reverse growth of hemati-te-magnetite and magnetite zones, formation of skarnoids and hydrothermal veins with actinolite and hornblen-de, alkaline autometasomatites with hornblende and aegirine). | |
dc.title | КАЛЬЦИЕВЫЕ АМФИБОЛЫ ИЗ ПОРОД ПОЛОСЧАТОЙ ЖЕЛЕЗОРУДНОЙ ФОРМАЦИИ КОЛЬСКОГО ПОЛУОСТРОВА | |
dc.type | Статья | |
dc.subject.udc | 549.643:553.31(=924.16) |
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