Just Published!

Geology and Ore Deposits of the Creede District, Colorado

by

William H Emmons

Paperback 198 Pages

Reprint of the Original USGS 1923 Bulletin 718

Now back in print by miningbooks.com is this newly republished book on the Geology and Ore Deposits of the Famous Creede District Colorado. Great book on the geology, ore deposits and mining history of this district.

Contents:

Chapter I. Introduction

• Location and topography
• Tield work and acknowledgments
• History
• Mining and treatment of ores
• General conditions
  • Humphreys mill
  • Amethyst mill
  • Solomon mill
  • Ridge mill
• Production
• Bibliography
• Chapter II. Outline of the geology
  • Age of the rocks
  • Potosi volcanic series
  • Alboroto group
  • Piedra group
  • Creede formation
  • Fisher quartz latite
  • Intrusive rocks
  • Quaternary deposits
  • Geologic structure
• III. Rocks of the Alboroto group
  • General features
  • Outlet Tunnel quartz latite
  • General character and occurrence
  • Petrography
  • Weathering and outcrops
  • Willow Creek rhyolite
  • General character and distribution
  • Petrography
  • Chemical composition
  • Structure
  • Weathering and alteration
  • Topography and scenery
  • Oampbell Mountain rhyolite
  • General character and distribution
  • Contacts
  • Petrography
  • Weathering and outcrops
  • Distinction from other rhyolites
  • Phoenix Park quartz latite
  • General character and distribution
  • Petrography
  • Outcrops and weathering.
  • Equity quartz latite
  • General character and occurrence
  • Contacts
  • Petrography
  • Weathering and outcrops
• Chapter IV. Rocks of the Piedra group
  • General features
  • Hornblende-quartz latite
  • General character and distribution
  • Thickness
  • Petrography
  • Weathering and outcrops
  • Windy Gulch rhyolite breccia
  • General character and distribution
  • Petrography
  • Weathering and outcrops
  • Comparison with Campbell Mountain rhyolite
  • Mammoth Mountain rhyolite
  • General character and distribution
  • Character of contacts and thickness
  • Petrography
  • Weathering and outcrops
  • Comparison with Campbell Mountain rhyolite
  • Rhyolite tuff
  • General character and distribution
  • Petrography
  • Tridymite latite
  • General character and occurrence
  • Thickness
  • Petrography
  • Tridymite, quartz, and cristobalite in volcanic rocks
  • Chemical composition
  • Flow near mouth of Deerhorn Creek
  • Outcrops, weathering, and alteration
  • Andesite
  • General character and distribution.
  • Petrography
  • Alteration and topography
  • Quartz latite tuff
  • General character and occurrence
  • Thickness
  • Petrography
  • Massive rock in the tuff
  • Weathering and outcrops
  • Rat Creek quartz latite
  • General character and distribution
  • Thickness
  • Petrography
  • Weathering, outcrops, and topography
  • Nelson Mountain quartz latite
  • General character and distribution
  • Thickness
  • Petrography
  • Weathering and outcrops
• Chapter V. Creede formation
  • Name, general character, and occurrence
  • Structure and thickness
  • Subdivisions
  • Lower member
  • General character
  • Petrography
  • Interbedded travertine
  • Character and distribution.
  • Origin
  • Upper member
  • General character and distribution
  • Petrography
  • Massive rocks
  • Weathering and topography
  • Origin
  • Position in the section
  • Age
• Chapter VI. Fisher quartz latite
  • General relations
  • General character and distribution
  • Thickness
  • Petrography
  • Weathering and outcrops
• Chapter VII. Intrusive rocks
  • Types
  • Rhyolite porphyry
  • General character and distribution
  • Relation to adjoining rocks
  • Petrography
  • Quartz latite porphyry
  • Occurrence
  • Age
  • Petrography
  • Intrusive basalt
  • Occurrence
  • Petrography
  • Hornblende-quartz latite porphyry
• Chapter VIII. Quaternary deposits
  • Significance
  • Moraines
  • Distribution
  • Glacial topography
  • Two stages of glaciation
  • Earlier moraines
  • Later moraines
  • Character of material
  • Postglacial erosion
  • Economic considerations
  • Terrace gravels
  • Landslides
  • General features
  • Distribution
  • Economic considerations
  • Talus
  • Alluvial fans
  • Alluvium
• Chapter IX. Structure
  • Faulting
  • Difficulties in detecting faults
  • General character of faulting
  • Age
  • Mineralization along faults
  • Amethyst fault system
  • Equity fault
  • Fault block of Mammoth Mountain
  • Bulldog Mountain fault
  • Solomou-Ridge fault
  • Alpha fault
  • Structure northeast of Sunnyside
  • Minor faults
• Chapter X. Ore deposits
  • General character
  • Minerals of the deposits
  • Quartz
  • Barite
  • Thuringite
  • Adularia
  • Rhodochrosite
  • Fluorite
  • Galena
  • Pyrite
  • Sphalerite
  • Chalcopyrite
  • Gold
  • Native silver
  • Argentite
  • Stephanite
  • Marcasite
  • Anglesite
  • Cerusite
  • Limonite
  • Jarosite
  • Calcite
  • Siderite
  • Malachite
  • Chryaocolla
  • Kaolin
  • Cerargyrite
  • Chrysoprase
  • Chalcedony
  • Wad
  • Goelarite
  • Gypsum.
  • Chalcanthite
  • Melanterite
  • Smithsonite
  • Pyromorphite
  • Hematite
• The fractures
• General character
• Nature of fault movements
• Character of the ores
• Composition and metals contained
• Structure and paragenesis of the primary ores
• Hydrothermal metamorphiam
• Character of solutions that deposited the primary ores
• Age and genesis of the deposits
• Superficial alteration of ores
• Downward enrichment
• General character
• Fractured condition of the lodes
• Mine waters
• Composition of altered ores
• Secondary precipitation of silver and gold
• Extent of Amethyst vein before erosion
• Gases in Amethyst lode
• Exploration of district
• Extensions on strike of developed deposits
• Fractures and veins in walls of developed deposits
• Extensions in depth
• Prospecting for new lodes
• Chapter XI. Mines
  • Bachelor mine
  • Copper lode
  • Commodore mine
  • Last Chance, New York, and Del Monte mines
  • Amethyst mine
  • Happy Thought mine
  • White Star mine
  • Park Regent mine
  • Captive Inca mine
  • Dolgooth claim
  • Equity mine
  • Exchequer tunnel
  • Jo Jo tunnel
  • Mammoth mine
  • Oxide claims
  • Pipe Dream claim
  • Mustang vein
  • Overholtlode
  • Rio Grande No.2 lode
  • Jack Pot lode
  • Solomon and Holy Moses mines
  • Ridge mine
  • Phoenix mine
  • Outlet tunnel and Ada group of claims
  • Carbonate vein
  • Mollie S. mine
  • Eunice mine
  • Dora Belle tunnels
  • Homestake claim
  • Mammoth tunnel
  • Barney tunnel
  • Monte Carlo mine
  • Conejos No. 2 chum
  • Cleaveland tunnel
  • Tahrahathea claim
  • Bulldog, Kansas City Star, and North Star claims
  • Bethel claim
  • Little Gold Dust claim
  • Alpha and Corsair mines
  • Reno prospect
  • Kreutzer Sonata mine
  • Diamond King claim and Paris tunnel
  • Monon mine
  • Sunnyside tunnel
  • Delaware claim
• Index