Altered Volcanic Rocks.A guide to description and interpretation

دسته بندی: زمين شناسي
ویرایش:  
نویسندگان: Cathryn Gifkins,  Walter Herrmann,  Ross Large.  
سری:  
 
ناشر:  
سال نشر:  
تعداد صفحات: 288 
زبان: English 
فرمت فایل : PDF (درصورت درخواست کاربر به PDF، EPUB یا AZW3 تبدیل می شود) 
حجم فایل: 45 مگابایت 

قیمت کتاب (تومان) : 34,000

Centre for Ore Deposit Research, 2005,271pages.
Altered volcanic rocks is principally for hands-on geologists who practise in mineral explorationand mining geology, and the students who may in the future play in those professional fields.This book will help to equip geologists working in altered and deformed successions with the skill and confidence to interpret the original volcanic facies and encourage the use of altered rocks as discriminants and vectors in mineral exploration. This book may not provide all the answers, but if it gives readers the courage to tackle the study of altered rocks, embrace the problems and pursue the answers it will have been worthwhile. Contents.
preface.
acknowledgements.
introduction.
alteration in submarine volcanic successions.
submarine volcanic successions.
Volcanic facies.
Volcanic facies associations.
Evidence for submarine environment of emplacement.
Alteration in submarine volcanic successions.
Devitrification.
Alteration processes.
Characteristics inherited from volcanic facies.
Geology of the Mount Read Volcanics.
Stratigraphy of the Mount Read Volcanics.
Submarine facies associations and architecture.
Post-depositional alteration processes.
Mineral deposits and prospects.
Geology of the Mount Windsor Subprovince.
Stratigraphy of the Seventy Mile Range Group.
Submarine facies associations and architecture.
Post-depositional alteration processes.
Mineral deposits and prospects.
Describing altered volcanic rocks.
frequently asked questions.
Alteration nomenclature.
Mineral-based alteration nomenclature.
Compositional alteration nomenclature.
Generic alteration nomenclature.
Descriptive nomenclature — alteration facies.
Alteraction facies — the recommended method.
Alteration mineral assemblage.
Tools for mineralogical determination.
Alteration intensity.
Qualitative estimates of alteration intensity.
Quantitative estimates of alteration intensity.
An integrated approach to alteration intensity.
Alteration data sheets.
Common alteration textures and zonation patterns.
alteration textures.
Replacement textures.
Infill textures.
Dissolution textures.
Static recrystallisation textures.
Dynamic recrystallisation textures.
Deformation textures.
Pseudotextures.
Pseudoclastic textures.
False polymictic texture.
False matrix-supported texture.
False coherent textures.
Alteration distribution.
Alteration zonation patterns.
Regional diagenetic zones.
Regional metamorphic zones.
Regional, deep, semi-conformable altered zones.
Local contact metamorphic or hydrothermally altered halos.
Local hydrothermally altered halos around ore deposits.
Vein and fracture altered halos.
Overprinting relationships and timing of alteration.
Method.
Overprinting textures.
Geochemistry of altered rocks.
lithogeochemistry.
Sampling and analytical methods.
Closure in composition data.
Chemostratigraphy.
Mass transfer techniques.
Rare-earth-element geochemistry related to alteration.
Mineral chemistry.
Principles.
Applications.
Stable isotopes.
Theoretical background.
Isotopic applications in alteration studies.
Seafloor-and burial-related alteration.
alteration related to sea-floor processes and burial.
Physical conditions.
Definitions.
Hydration.
Palagonite.
Perlite.
Diagenesis (glass to zeolite facies).
Diagenetic minerals.
Diagenetic zones.
Genesis of diagenetic minerals and zones.
Regional metamorphism (zeolite to amphibolite facies).
Transition from diagenesis to regional metamorphism.
Burial metamorphism.
Burial metamorphic facies.
Burial metamorphic zones.
Zeolite facies.
Genesis.
Diagenetic alteration in the Hokuroku Basin.
Geological setting.
Alteration facies and zones.
Genesis of altered zones.
Data sheets.
Diagenetic alteration in the Mount Read Volcanics.
Geological setting.
Alteration fades and zonation.
Genesis of alteration fades.
Data sheets.
Synvolcanic intrusion-related alteration.
the role of intrusions in generating hydrothermal systems.
Subseafloor regional hydrothermal systems.
Regional altered zones assodated with intrusions.
Recharge zones.
Discharge zones.
Deep, semi-conformable altered zones.
Altered zones as part of a regional hydrothermal system.
Altered zones within intrusions '.
Deuteric alteration.
Hydrothermal alteration.
Contact altered halos around intrusions.
Contact altered zones.
Genesis of contact altered zones.
Contact altered zones associated with the Darwin Granite.
Geological setting.
Alteration fades and zonation.
Genesis of the alteration system.
Data sheets.
Local hydrothermal alteration related to vhms deposits.
common features of Vhms deposits.
Hydrothermal alteration halos associated with Vhms deposits.
Footwall alteration pipes.
Stratabound altered footwall zones.
Altered hanging wall zones.
Chemical reactions and mass changes.
Alteration box plot trends in altered footwall zones.
The genesis of footwall alteration pipes.
Significance of pyrophyllite and kaolinite in Vhms systems.
Metamorphism of altered zones.
The spectrum of volcanic-hosted deposits and associated alteration patterns.
Hydrothermal alteration related to the spectrum of deposits.
Comparisons between Archaean, Palaeozoic and Cainozoic Vhms alteration systems.
Australian Palaeozoic Vhms alteration halos.
Japanese Cainozoic Vhms alteration halos.
Canadian and Australian Archaean Vhms alteration halos.
Comparisons : .
Hellyer: a massive elongate polymetallic lens.
Geological setting.
Alteration fades and zonation.
Ore genesis.
Data sheets.
Rosebery: a polymetallic sheet-style deposit.
Geological setting.
Alteration facies and zonation.
Genesis of the ore lenses and alteration system.
Data sheets.
Western Tharsis: a hybrid Cu-Au Vhms deposit.
Geological setting.
Alteration facies and zonation.
Ore genesis.
Data sheets.
Henty: a volcanogenic gold deposit.
Geological setting.
Alteration fades and zonation.
Ore genesis.
Data sheets.
Thalanga: a polymetallic sheet-style deposit.
Geological setting.
Alteration facies and zonation.
Ore genesis.
Data sheets.
Highway-Reward: a pipe style Cu-Au Vhms deposit.
Geological setting.
Alteration facies and zonation.
Ore genesis.
Data sheets.
Finding ore deposits in altered volcanic rocks : .
principles of discriminating between diagenetic, hydro thermal and metamorphic alteration facies.
Diagenetic facies.
Metamorphic facies.
Hydrothermal alteration facies.
Exploration vectors and proximity indicators.
Mineral zonation.
Major element lithogeochemistry.
Alteration indices.
Mass change vectors.
Mineral chemistry vectors.
Isotopic vectors.
References.
index.