Published 1980 | Version v1
Miscellaneous Open

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