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Gold-Bearing Geology Explained: Interpreting Veins, Placers, Alteration Zones, and Geological Structures for Prospecting
Paperback
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Publisher: Independently Published
Pages: 206
Weight: 1.08
Height: 0.44 Width: 8.50 Depth: 11.00
Language: English
Gold deposits are shaped by rock type, fluids, fractures, weathering, erosion, and time. This book brings those relationships together in a clear prospecting framework, helping readers move from surface observations to a reasoned geological interpretation.
Beginning with the geological behavior of gold, the book explains how primary, secondary, reworked, placer, and residual deposits form and how they relate to the rock cycle and geological history. It then provides a field-oriented introduction to igneous, sedimentary, and metamorphic rocks, including the textures, grain sizes, fabrics, and host-rock features that can guide examination of an exposure.
What the book covers- Deposit settings: Orogenic, intrusion-related, epithermal, Carlin-type, sediment-hosted, paleoplacer, and residual systems.
- Veins and lodes: Quartz and carbonate veins, banding, brecciation, vugs, crustification, stockworks, sheeted zones, wall-rock contacts, and ore shoots.
- Alteration and mineralization: Silicification, carbonatization, sericitization, chloritic, propylitic, argillic, and potassic alteration, along with sulfides, oxidation zones, and gossans.
- Structural controls: Faults, shear zones, folds, joints, dilational openings, and the intersections where mineralized fluids may have been focused.
- Surficial geology: Stream transport, hydraulic sorting, pay streaks, bedrock traps, regolith, soil horizons, laterite, ferricrete, calcrete, float, and subcrop.
- Exploration methods: Geological mapping, structural measurements, rock and soil sampling, stream sediments, heavy minerals, geochemistry, geophysics, satellite imagery, and spectral alteration mapping.
Each major theme is connected to practical field decisions. Examples show how to build a prospecting checklist, identify host rocks, map a vein system, read alteration zonation, assess structural intersections, sample a stream from source to deposit, distinguish local soil anomalies from transported signals, and assemble a prospect-scale geological map.
The later chapters focus on reliable evidence. Readers learn how to control sampling bias, use pathfinder elements, apply blanks, standards, and duplicates, integrate geophysical results with field geology, construct cross-sections and three-dimensional models, and separate genuine indicators from anomalies that lack economic significance. Guidance on trenching, drilling, repeat sampling, documentation, and chain of custody reinforces the importance of verification.
Written for prospectors, geology students, field technicians, explorers, and serious enthusiasts, this resource emphasizes careful observation, practical terminology, and realistic conclusions. It does not promise that a single quartz vein, soil anomaly, or geophysical response proves a discovery. Instead, it shows how multiple lines of geological evidence can be tested and combined into a stronger, more defensible exploration model.
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