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Geologia Del Cuadrangulo De Nuñoa

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Geologia Del Cuadrangulo De Nuñoa REPUBLICA DEL PERU SECTOR ENERGIA Y MINAS INSTITUTO GEOLOGICO MINERO Y METALURGICO BOLETIN No 74 Serie A : Carta Geológica Nacional GEOLOGIA DEL CUADRANGULO DE NUÑOA Hoja: 29-u Por :Juan Carlos López Avilés INGEMMET Lima- Perú Setiembre, 1996 INSTITUTO GEOLOGICO MINERO Y METALURGICO DANIEL HOKAMA TOKASHIKI Ministro de Energía y Minas JUAN MENDOZA MARSANO Vice-Ministro de Minas INGEMMET y Presidente del Consejo Directivo de INGEMMET WAL TER CASQUINO REY- ROBERTO PLENGE CANNOCK LINDBERG MEZA CARDENAS- NICANOR VILCHEZ ORTIZ GERARDO PEREZ DEL AGUILA Consejo Directivo HUGO RIVERA MANTILLA Director Técnico FUNCIONARIOS TECNICOS RESPONSABLES DE LA EDICION OSCAR PALACIOS MONCA YO Director General de Geología AGAPITO SANCHEZ FERNANDEZ Director de Carta Geológica Nacional FRANCISCO HERRERA ROMERO Director de Información y Promoción Primera Edición, INGEMMET, 1996 Impreso en INGEMMET Coordinación, Revisión y Edición Dirección de Información y Promoción de INGEMMET Lima- Perú Contenido RESUMEN .............................................................................................................................1 Capítulo I ...............................................................................................................................5 INTRODUCCION .................................................................................................................5 1.1 UBICACION ......................................................................................................5 1.2 ACCESIBILIDAD ...............................................................................................5 1.3 BASE TOPOGRAFICA Y AEROFOTOGRAFICA ...........................................7 1.4 METODOLOGIA DEL TRABAJO .....................................................................7 1.5 TRABAJOS ANTERIORES ................................................................................9 Capítulo II ........................................................................................................................... 11 GEOGRAFIA ....................................................................................................................... 11 2.1 CLIMA .............................................................................................................. 11 2.2 TEMPERATURA ...............................................................................................12 2.3 PRECIPITACIONES .........................................................................................12 2.4 HUMEDAD RELATIVA ....................................................................................12 2.5 VEGETACION..................................................................................................12 2.6 HIDROGRAFIA ................................................................................................13 Capítulo III ..........................................................................................................................15 GEOMORFOLOGIA ...........................................................................................................15 3.1 UNIDADES GEOMORFOLOGICAS ..............................................................15 3.1.1 RELIEVE CORDILLERANO ................................................................15 3.1.2 LADERA CORDILLERANA .................................................................16 3.4 MESETA CORDILLERANA ............................................................................19 3.5 PLATAFORMA VOLCANICA.........................................................................19 3.6 CUESTAS DE PUTINA ....................................................................................20 3.7 MONTAÑA INTRACORDILLERANA............................................................23 3.8 PENEPLANICIE ANDINA ..............................................................................23 3.9 LOMADAS .......................................................................................................24 3.10 VALLES ............................................................................................................24 3.10.1 Valles Fluviales ........................................................................................27 3.10.2 Valles Glaciares .......................................................................................27 i INGEMMET Capitulo IV ..........................................................................................................................31 ESTRATIGRAFIA ...............................................................................................................31 4.1 PALEOZOICO..................................................................................................31 4.1.1 Formación Chagrapi ................................................................................31 4.1.1.1 Secuencia Inferior........................................................................33 4.1.1.2 Secuencia Superior......................................................................34 4.1.2 Formación Ananea ..................................................................................41 4.1.3 Grupo Ambo...........................................................................................43 4.1.3.1 Secuencia Inferior........................................................................44 4.1.3.2 Secuencia Superior......................................................................44 4.1.4 Grupo Tarma ...........................................................................................50 4.1.5 Grupo Copacabana .................................................................................51 4.1.6 Grupo Mitu .............................................................................................57 4.1.6.1Secuencia Principalmente Clástica.................................................58 4.1.6.2Secuencia Principalmente Volcánica ..............................................59 4.2 MESOZOICO ...................................................................................................60 4.2.1 Formación Muni ......................................................................................65 4.2.2 Formación Huancané...............................................................................66 4.2.3 Grupo Moho ...........................................................................................68 4.2.3.1Formación Viluyo .........................................................................68 4.2.3.2Formación Ayavacas ....................................................................71 4.2.3.3 Formación Hanchipacha ..............................................................77 4.2.4 Formación Chilca ....................................................................................84 4.3 CENOZOICO ...................................................................................................87 4.3.1 Formación Quenamari .............................................................................87 4.3.1.1 Miembro Chacacuniza .................................................................88 Características Geoquímicas ....................................................................89 4.3.1.2 Miembro Sapanuta ......................................................................89 4.3.1.3 Miembro Yapamayo ....................................................................97 4.3.2 Depósitos Recientes ..............................................................................100 4.3.2.1 Depósitos Morrénicos ...............................................................100 4.3.2.2 Depósitos Glacio-Fluviales ........................................................102 4.3.2.3 Depósitos Aluviales ...................................................................102 Capítulo V .........................................................................................................................103 ROCAS INTRUSIVAS ......................................................................................................103 5.1. INTRUSIVOS PALEOGENOS.......................................................................103 5.1.1 Plutón de La Raya ...................................................................................103 5.1.2 Intrusiones Subvolcánicas.........................................................................104 5.2 INTRUSIONES NEOGENAS ........................................................................109 ii Geología del Cuadrángulo de Nuñoa 5.2.1 Microcuarzodiorita ................................................................................109 5.2.2 Pórfidos Ninahuisa ................................................................................ 110 5.2.2.1 Pórfido Colquetauca.................................................................. 110 5.2.3 Dacitas .................................................................................................. 115 5.2.4 Pórfidos Riolíticos ................................................................................. 116 5.2.4.1Pórfido de La Huaña .................................................................. 116 5.2.4.2Pórfido Cuello ............................................................................123 5.2.4.3Pórfido Huayracota ....................................................................124 5.2.5 Pórfido de Surapata ..............................................................................125 Capítulo VI ........................................................................................................................129
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