The Seis Lagos Carbonatite Complex
- 1. Departamento Nacional de Producao Mineral, Rio de Janeiro (Brazil). Projeto RADAMBRASIL
Description
The Seis Lagos Carbonatite Complex located about 840 Km from Manaus, on the northwestern part of the Estado do Amazonas, Brazil is described. Geological reconnaissance mapping by Radam Project/DNPM, of the southwestern portion of the Guianes Craton, determined three circular features arranged in a north-south trend and outcroping as thick lateritic radioactive hills surrounded by gneisses and mignatites of the peneplained Guianense Complex. Results of core drilling samples analysis of the Seis Lagos Carbonatite Complex are compared with some igneous rocks and limestones of the world on the basis of abundance of their minor and trace elements. Log-log variation diagram of strontium and barium in carbonatite and limestone, exemplifield by South Africa and Angola carbonatites, are compared with the Seis Lagos Carbonatite Complex. The Seis Lagos Carbonatite Complex belongs to the siderite-soevite type. (E.G.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Descreve-se o complexo Carbonatitico de Seis Lagos localizado a mais ou menos 840 Km de Manaus, na parte nordeste do estado do Amazonas, no Brasil. O mapeamento de reconhecimento geologico feito pelo Projeto RADAM/DNPM, na parte sudoeste do Craton Guianes, determinou tres aspectos circulares arrumados em uma formacao norte-sul e leves afloramentos em montanhas lateriticas radioativas circundadas por gnaisses e migmatitos do peneplano do Complexo Guianense. Comparam-se os resultados obtidos das analises das amostras de sondagens do nucleo do Complexo Carbonatitico de Seis Lagos com algumas rochas igneas e limoniticas do mundo, com base na abundancia dos elementos tracos. Comparam-se os diagramas de variacao log-log do estroncio e bario na carbonatita e na limonita, exemplificados pelos carbonatitos da Africa do Sul e Angola. O complexo carbo natitico de Seis Lagos pertence ao tipo Siderite-Soevite. (E.G.)Files
14741504.pdf
Files
(449.5 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:469c7f0442bde6bac969c424b0529b81
|
449.5 kB | Preview Download |
Additional details
Publishing Information
- Imprint Pagination
- 10 p.
- Report number
- INIS-mf--7811
Conference
- Title
- 31. Brazilian Congress of Geology.
- Dates
- 19 - 25 Oct 1980.
- Place
- Camboriu, Santa Catarina (Brazil).
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 14741504
- Subject category
- S58: GEOSCIENCES;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BARIUM; BRAZIL; COMPARATIVE EVALUATIONS; ELEMENTS; GEOLOGIC FORMATIONS; GEOLOGY; LIMONITE; ROCK DRILLING; STRONTIUM
- Descriptors DEC
- ALKALINE EARTH METALS; CHALCOGENIDES; DEVELOPING COUNTRIES; IRON COMPOUNDS; IRON ORES; IRON OXIDES; MACHINING; MATERIALS DRILLING; METALS; MINERALS; ORES; OXIDES; OXYGEN COMPOUNDS; SOUTH AMERICA; TRANSITION ELEMENT COMPOUNDS