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{"id":1117,"date":"2019-06-14T09:14:02","date_gmt":"2019-06-14T09:14:02","guid":{"rendered":"https:\/\/www.revuboe.com\/?page_id=1117"},"modified":"2020-01-06T08:05:43","modified_gmt":"2020-01-06T08:05:43","slug":"recursos","status":"publish","type":"page","link":"https:\/\/www.revuboe.com\/?page_id=1117&lang=pt","title":{"rendered":"Recursos"},"content":{"rendered":"

Geologia Regional<\/h3>\n

O projeto de carv\u00e3o da Minas de Revubo\u00e8 4064C est\u00e1 inserido dentro da Sub-bacia de Moatize, que a semelhan\u00e7a de outros dep\u00f3sitos de carv\u00e3o da Africa Subsaariana \u00e9 maioritariamente hospedado em rochas sedimentares do Supergrupo Karoo.<\/p>\n

A \u00e1rea do projecto 4065C est\u00e1 preservada em uma estrutura de semi-graben. O espa\u00e7o de acomoda\u00e7\u00e3o inicial para o desenvolvimento do Supergrupo Karoo est\u00e1 provavelmente relacionado com a forma\u00e7\u00e3o da bacia de rift do Carbon\u00edfero Superior a P\u00e9rmico Inferior, que subsequentemente foi impactado pelas duas fases de tect\u00f3nica de extens\u00e3o no Jur\u00e1ssico M\u00e9dio e no Cret\u00e1ceo Inferior.<\/p>\n

A geologia superficial da \u00e1rea do projecto 4064C \u00e9 dominada por afloramentos e sub-afloramentos de rochas sedimentares das forma\u00e7\u00f5es de Vuzi, Moatize e Matinde, sendo que o soco cristalino exp\u00f5e-se na zona norte da concess\u00e3o mineira.<\/p>\n

Uma sucess\u00e3o estratigr\u00e1fica generalizada e uma descri\u00e7\u00e3o da \u00e1rea da concess\u00e3o mineira 4064C \u00e9 apresentada na figura 1, em conjun\u00e7\u00e3o com as nomenclaturas cl\u00e1ssicas correspondentes das sub-bacias de Tete.<\/p>\n

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Figura 1: Sequ\u00eancia estratigr\u00e1fica generalizada tal como encontrada na \u00e1rea do projecto 4064C e com as nomenclaturas cl\u00e1ssicas das sub-bacias de Tete inclu\u00eddas.<\/figcaption><\/figure>\n

A geometria das unidades econ\u00f3micas de carv\u00e3o presentes na concess\u00e3o sup\u00f5e estar intimamente relacionada com ambientes deposicionais e com um sistema de falhas extensionais sin-deposicionais activas. Como resultado, o carv\u00e3o presente na zona Oeste do dep\u00f3sito \u00e9 significativamente diferente do carv\u00e3o da zona Este em termos de geometria, embora estes sejam similares no que se refere a qualidade. A Figura 2 abaixo mostra as espessuras das rochas (ganga) que separam as subcamadas de carv\u00e3o ao longo da Camada 3 (Equivalente a Camada Chipanga).<\/p>\n

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Figura 2. Separa\u00e7\u00f5es interiores (gangal) ao longo da Camada 3 (Equivalente a Camada Chipanga)..<\/figcaption><\/figure>\n

Recurso de Carv\u00e3o<\/h3>\n

A estimativa actual de carv\u00e3o in situ<\/em> \u00e9 de 1,580\u00a0Mt <\/strong>como declarado a 31 de Julho de 2017. Os recursos de carv\u00e3o consistem de 605 Mt <\/strong>na categoria de Recursos Medidos, 535 Mt <\/strong>na categoria de Recursos Indicados e os restantes 445 Mt <\/strong>na categoria de Recursos Inferidos. A Tabela 1 abaixo mostra o sum\u00e1rio da tonelagem de carv\u00e3o por cada camada, associada a qualidades imediatas de carv\u00e3o.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\nTonelada (Milh\u00f5es de Toneladas)<\/strong><\/td>\nQualidade M\u00e9dia do Carv\u00e3o Bruto <\/strong><\/td>\n <\/p>\n

Reflex\u00e3o M\u00e1xima (RoMax)<\/td>\n<\/tr>\n

Grupo da Camada<\/strong><\/td>\nMedido<\/td>\nIndicado<\/td>\nInferido<\/td>\nTotal<\/td>\nDensidade Relativa in situ<\/em> (g\/cc)<\/td>\nCinza% (Adb)<\/td>\nHumidade Inerente% (Adb)<\/td>\nValor Calor\u00edfico (Adb) kcal\/kg<\/td>\nMat\u00e9ria Vol\u00e1til (DAF)<\/td>\nTotal de Enxofre% (Adb)<\/td>\n<\/tr>\n
13<\/td>\n–<\/td>\n–<\/td>\n47<\/td>\n47<\/td>\n1.75<\/td>\n48.18<\/td>\n0.89<\/td>\n–<\/td>\n28.08<\/td>\n0.00<\/td>\n1.15<\/td>\n<\/tr>\n
10J<\/td>\n–<\/td>\n6<\/td>\n15<\/td>\n21<\/td>\n1.78<\/td>\n50.37<\/td>\n1.24<\/td>\n3,869<\/td>\n31.45<\/td>\n1.53<\/td>\n1.21<\/td>\n<\/tr>\n
9U<\/td>\n–<\/td>\n–<\/td>\n5<\/td>\n5<\/td>\n1.66<\/td>\n41.62<\/td>\n0.86<\/td>\n4,383<\/td>\n31.63<\/td>\n1.76<\/td>\n1.50<\/td>\n<\/tr>\n
9<\/td>\n9<\/td>\n58<\/td>\n47<\/td>\n114<\/td>\n1.66<\/td>\n39.99<\/td>\n0.86<\/td>\n4,291<\/td>\n30.02<\/td>\n1.12<\/td>\n1.10<\/td>\n<\/tr>\n
8a<\/td>\n1<\/td>\n0<\/td>\n–<\/td>\n1<\/td>\n1.77<\/td>\n48.82<\/td>\n0.65<\/td>\n–<\/td>\n32.37<\/td>\n0.00<\/td>\n1.13<\/td>\n<\/tr>\n
7<\/td>\n18<\/td>\n81<\/td>\n50<\/td>\n148<\/td>\n1.68<\/td>\n41.20<\/td>\n0.86<\/td>\n4,299<\/td>\n30.70<\/td>\n1.05<\/td>\n1.28<\/td>\n<\/tr>\n
5<\/td>\n99<\/td>\n38<\/td>\n46<\/td>\n182<\/td>\n1.61<\/td>\n34.97<\/td>\n0.90<\/td>\n4,976<\/td>\n28.20<\/td>\n1.05<\/td>\n1.32<\/td>\n<\/tr>\n
3D<\/td>\n10<\/td>\n4<\/td>\n7<\/td>\n21<\/td>\n1.67<\/td>\n39.25<\/td>\n0.67<\/td>\n5,048<\/td>\n27.90<\/td>\n1.24<\/td>\n1.08<\/td>\n<\/tr>\n
3C<\/td>\n77<\/td>\n85<\/td>\n40<\/td>\n202<\/td>\n1.76<\/td>\n44.83<\/td>\n0.93<\/td>\n3,968<\/td>\n29.25<\/td>\n1.31<\/td>\n1.41<\/td>\n<\/tr>\n
3B<\/td>\n221<\/td>\n130<\/td>\n93<\/td>\n444<\/td>\n1.70<\/td>\n41.41<\/td>\n0.86<\/td>\n4,218<\/td>\n28.07<\/td>\n1.02<\/td>\n1.45<\/td>\n<\/tr>\n
3A<\/td>\n170<\/td>\n133<\/td>\n97<\/td>\n399<\/td>\n1.71<\/td>\n41.84<\/td>\n0.84<\/td>\n4,505<\/td>\n27.64<\/td>\n0.88<\/td>\n1.50<\/td>\n<\/tr>\n
Total<\/strong><\/td>\n605<\/strong><\/td>\n535<\/strong><\/td>\n445<\/strong><\/td>\n1,580<\/strong><\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n\u00a0<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Tabela 1<\/strong> Sum\u00e1rio de Recursos de Carv\u00e3o do Dep\u00f3sito da Minas de Revubo\u00e8 (Concess\u00e3o Mineira 4064C)<\/p>\n