Structural methodsin explorationCollection of orientation data

Analysis methodsStructural orientation dataStructural patterns map, x-sectionFault-vein longitudinal sectionsDrill targeting - ore zones, ore shoots

Collection of orientation data bedding/contact strike/dip fault strike/dip slickenline rake shear sense vein strike/dip fold fold axis fold axial plane (cleavage) fold asymmetry, vergence dike strike/dip flow foliation shear sense

Collection of orientation dataBasement structure important: test for structural controls Volcanic structuresFlow layering test for flow dome geometry, concentric/radialBedding/volc. layering test for block rotations, inference of listric normal faults, intrusive centersDikes test for intrusive center, extension directionFault and fault-vein dataStrike/dip, slickenline rake, shear sense, fill paragenesis test for kinematic control on ore shoot

Analysis of structural dataSlickenline histogram test for dominant structural regime

Quellopata

Statistical analysis determine average orientation of fabric elements or setsIdaho Springs district, Colorado

Statistical analysis determine average orientation of fabric elements or setsIdaho Springs district, Coloradofoliationveins

Paleo-stress modeling determine extension directionM-plane analysisFaultkin analysis

M-plane analysisT-fractures = most favorable opening = s1 s2 plane

Ejemplo de anlisis cinemtica, Veta Baja, Arcata mine, Peru

EjercicioPaleo-stress modelingVeta Baja data: MHC geos: M-plane method Compile all data (Nelson Faultkin)Tres Reyes dataVeta Baja dataCompile:

Structural pattern recognitionMap and cross section patterns but 3-DPatterns:ConjugateOrthorhombicEn echelonjog, bend (cymoid loop)

en echelon, jog, bend

Cerro Blanco, Chile

Intersection model

Fault-vein longitudinal sectionsProject x, y, z mine data to longitudinal sectionContour:Ore gradeVein thicknessStrikeDipMetal ratios, geochemistry

Long Sections

Dip - Grade

Strike - GradeN

Drill targeting - Designore zones, ore shoots

Other Models

Ore shoot = cutoff lineSlickenlines ^ ore shoot 90Ore shoot = fault Riedel intersection

Ore shoot = cutoff line

Slickenlines ^ ore shoot 90

Ore shoot = fault Riedel intersectionOblique slip

EjercicioDrill hole designVeta Baja data: slickenline model

Veta Tres Reyes data: fault jog model(need data from all MHC geos)

WHAT ARE THE EQUATIONS ??