Daniel Müller, David I. Groves

Potassic Igneous Rocks and Associated Gold-Copper Mineralization

• Broschiertes Buch

Produktbeschreibung

Potassic igneous rocks have gained much attention among petrologists worldwide, mainly due to their distinct geochemistry, and many geoscientists still consider them as petrological curiosities with an obscure petrogenesis. In the past, a plethora of genetic hypotheses and of local names for potassic igneous rocks from different localities have been created. This has produced some confusion in the literature. This book reviews the geochemical and petrological characteristics of the potassic igneous rock complexes and investigates the different tectonic settings in which these rocks occur. The authors provide an overview and a classification of these rocks and attempt to elucidate the geochemical differences between barren and mineralized potassic igneous complexes. Many epithermal gold and porphyry copper-gold deposits are hosted by high-K rocks. Therefore, this book is not only relevant to academic petrologists working on alkaline rocks, but also to exploration geologists prospecting for epithermal gold and/or porphyry copper-gold deposits in modern and ancient terranes. This third, updated and enlarged edition contains several new sections, new geochemical data and additional references.

Produktdetails

• Verlag: Springer / Springer Berlin Heidelberg / Springer, Berlin
• Artikelnr. des Verlages: 978-3-642-64075-9
• 3. Aufl.
• Seitenzahl: 272
• Erscheinungstermin: 18. September 2011
• Englisch
• Abmessung: 235mm x 155mm x 15mm
• Gewicht: 416g
• ISBN-13: 9783642640759
• ISBN-10: 3642640753
• Artikelnr.: 36114571

Inhaltsangabe

1 Introduction.- 1.1 Preamble: Potassic Igneous Rocks and Their Importance.- 1.2 Scope of Book.- 2 Definitions and Nomenclature.- 2.1 Historical Perspective of Potassic Igneous Rocks.- 2.2 Potassic Igneous Rocks as an Umbrella Term.- 2.3 Shoshonites.- 2.4 Shoshonitic and Alkaline Lamprophyres.- 2.5 Ultrapotassic Rocks.- 2.6 Group II Kimberlites.- 2.7 Potassic Igneous Rocks as Considered in this Book.- 2.8 Field Recognition of Potassic Igneous Rocks.- 3 Tectonic Settings of Potassic Igneous Rocks.- 3.1 Introduction.- 3.2 Tectonic Settings of Potassic Igneous Rocks.- 3.3 History of Discrimination of Tectonic Setting by Geochemical Means.- 3.4 Erection of Databases SHOSH1 and SHOSH2.- 3.5 Discrimination of Tectonic Setting by Multivariate Statistical Methods.- 3.6 Discrimination via Simple Geochemical Diagrams.- 3.7 Theoretical Basis for Discrimination Between Potassic Igneous Rocks in Different Tectonic Settings.- 3.8 Conclusions.- 4 Selected Type-Localities of Potassic Igneous Rocks from the Five Tectonic Settings.- 4.1 Roman Province (Italy): Example from a Continental Arc Setting.- 4.2 Kreuzeck Mountains, Eastern Alps (Austria): Example from a Postcollisional Arc Setting.- 4.3 Northern Mariana Arc (West Pacific): Example from an Initial Oceanic Arc Setting.- 4.4 Vanuatu (Southwest Pacific): Example from a Late Oceanic Arc Setting.- 4.5 African Rift Valley (Rwanda, Uganda, Zaire): Example from a Within-Plate Setting.- 5 Primary Enrichment of Precious Metals in Potassic Igneous Rocks.- 5.1 Introduction.- 5.2 Theoretical Discussion.- 5.3 Case Study: Potassic Alkaline Lamprophyres with Elevated Gold Concentrations from the Karinya Syncline, South Australia.- 5.4 Comparison of Precious Metal Abundances for Lamprophyres from the Karinya Syncline and Kreuzeck Mountains.- 6 Direct Associations Between Potassic Igneous Rocks and Gold-Copper Deposits.- 6.1 Direct Associations in Specific Tectonic Settings: Introduction.- 6.2 Erection of Database GOLD 1.- 6.3 Late Oceanic Arc Associations.- 6.4 Continental Arc Associations.- 6.5 Postcollisional Arc Associations.- 6.6 Synthesis of Direct Genetic Associations.- 7 Indirect Associations Between Lamprophyres and Gold-Copper Deposits.- 7.1 Introduction.- 7.2 Shoshonitic Lamprophyres with Elevated Gold Concentrations from the Goodall Gold Deposit, Northern Territory, Australia (Proterozoic).- 7.3 Shoshonitic Lamprophyres from the Tom's Gully Gold Deposit, Northern Territory, Australia (Proterozoic).- 7.4 Shoshonitic Lamprophyres from the Eastern Goldfields, Yilgarn Block, Western Australia (Archaean).- 7.5 Shoshonitic Lamprophyres from the Superior Province, Canada (Archaean).- 7.6 Indirect Link Between Lamprophyres and Archaean Gold Mineralization.- 7.7 Synthesis of Indirect Associations.- 8 Halogen Contents of Mineralized Versus Unmineralized Potassic Igneous Rocks.- 8.1 Introduction.- 8.2 Erection of Database MICA1.- 8.3 Discussion.- 9 Implications for Mineral Exploration.- 9.1 Introduction.- 9.2 Area Selection.- 9.3 Prospect Evaluation.- 10 Characteristics of Some Gold-Copper Deposits Associated with Potassic Igneous Rocks.- 10.1 Abbreviations.- 10.2 Tables of Deposit Characteristics.- References.

Rezensionen

"This is a great and useful book for post-grads and students of mineral systems in general. I have enjoying reading it and must say that I have actually learned a lot. The book has very up-to-date references at the time of its writing." (Franco Pirajno, Ore Geology Reviews 110, July 2019)

"This book should also be part of the library of exploration geologists. It is a great source for background information and well-documented examples. It is, however, up to the individual geologist to extract the full value. I would definitely recommend reading the entire book ... ." (Thomas Bissig, Mineralium Deposita, Vol. 53 (08), December, 2018)