Petrogenesis of mica-amphibole-bearing lamprophyres associated with the Paleoproterozoic Morro do Afonso syenite intrusion, eastern Brazil
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چکیده
منابع مشابه
Cysticercosis in epileptic patients of Mulungu do Morro Northeastern Brazil.
With the aim to study the magnitude of infection by the metacestode of Taenia solium in a population of epileptic patients in the arid region of Bahia, Northeastern Brazil, we examined 200 consecutive cases who attended an ambulatory clinic in the disctrict of Mulungu do Morro. Sixty-six of the patients had a diagnosis of epilepsy. From them 10 (15.2%) presented antibodies against a specific fr...
متن کاملPrevalence of Chagas' disease in Mulungu do Morro northeastern Brazil.
OBJECTIVE The aim of this paper is to describe the prevalence of T. Cruzi infection in patients of from Mulungu do Morro, a rural tropical region of Northeastern Brazil. METHODS A cross-sectional study was performed. After randomly selecting samples of the population, and obtaining their consents, patients completed pretested epidemiological and clinical questionnaires. Serum samples from all...
متن کاملکانی شناسی و بلورشیمی لامپروفیرهای شمال غرب ایران
There are numerous outcrops of lamprophyric rocks, as sill and dikes, in the northwestern part of Iran. These rocks can be classified in two mica- and amphibole-rich types. Amphibole-rich type includes amphibole, olivine psudomorphs, and clinopyroxene phenocrysts in the matrix of feldspar and altered glass. Mica-rich lamprophyres include mica and clinopyroxene phenocrysts in the matrix of felds...
متن کاملGeochemistry and petrogenesis of post-collisional ultrapotassic syenites and granites from southernmost Brazil: the Piquiri Syenite Massif.
The Piquiri Syenite Massif, southernmost Brazil, is part of the post-collisional magmatism related to the Neoproterozoic Brasiliano-Pan-African Orogenic Cycle. The massif is about 12 km in diameter and is composed of syenites, granites, monzonitic rocks and lamprophyres. Diopside-phlogopite, diopside-biotite-augite-calcic-amphibole, are the main ferro-magnesian paragenesis in the syenitic rocks...
متن کامل[Vectorial transmission of Chagas' disease in Mulungu do Morro, Northeastern of Brazil].
A serological survey was carried out to determine the prevalence of Chagas' disease in municipality. The following variables were analyzed to identify the form of transmission of this disease: age, sex, clinical and transfusional history, degree of kinship and serology. Within the 863 municipalities we studied, we identified 265 individuals, with serology testing done on them and on their respe...
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ژورنال
عنوان ژورنال: Journal of South American Earth Sciences
سال: 2006
ISSN: 0895-9811
DOI: 10.1016/j.jsames.2006.08.002