Mineral Deposits and Occurrences in the Arabian-Nubian Shield

This book presents a detailed review of the mineral deposits and occurrences in the Arabian-Nubian Shield (ANS), including their distribution, mineralization styles, economic importance, and geological controls on the mineralization. The purpose of the book is to compile the results of past and recent investigations on mineral deposits and occurrences in the ANS that covering the countries of (Saudi Arabia, Yemen, Egypt, Sudan, Eritrea, and Ethiopia). In this regard, it discusses in detail the various genetic mineralization styles in the ANS including: (1) magmatic mineral deposits associated with mafic-ultramafic rocks (e.g. chromite, Ni-Cu-Co-PGE magmatic sulfides, Fe-Ti-V oxides), (2) intrusion-related (magmatic-hydrothermal) deposits associated with felsic to intermediate rocks (porphyry, epithermal Au-Ag/sulfide vein type family, skarn, granite-related pegmatite-REE deposits), (3) hydrothermal orogenic gold and volcanogenic massive sulfide (VMS) deposits, as well as (4) surficial mineral deposits (chemical-sedimentary, residual, mechanical and supergene enrichment deposits).

Contenu

Chapter 1: Geology and Lithostratigraphy of the Arabian-Nubian Shield

1.1 Introduction

1.2 General Geology of the Arabian-Nubian Shield

1.2.1. Ophiolite Complex (Relicts of Oceanic Lithosphere)

1.2.2. Relicts of Precambrian Island Arcs

1.2.3. Arc-Accretion Related Suture Zones

1.2.4. Core (Gneiss Dome) Complexes

1.2.5. Sedimentary basins and Alkaline Granites - (Late Orogenic Features)

1.3 Lithostratigraphy of the ANS 1.3.1. Lithostratigraphy of the Arabian Shield Rocks in Saudi Arabia

(A) Introduction

(B) Tectonostratigraphic Terranes

(C) Layered Shield Rocks

(D) Intrusive Plutonic Shield Rocks

1.3.2 Lithostratigraphy of the Arabian Shield Rocks in Yemen

1.3.3. Lithostratigraphy of the Nubian Shield Rocks in Egypt

(A) Sinai Peninsula

(B) North Eastern Desert (NED)

(C) Central Eastern Desert (CED) (D) Southern Eastern Desert (SED)

1.3.4 Lithostratigraphy of the Nubian Shield Rocks in Sudan

1.3.5 Lithostratigraphy of the Nubian Shield Rocks in Eritrea

1.3.6 Lithostratigraphy of the Nubian Shield Rocks in Ethiopia

Chapter 2: Classification and General Distribution of Mineral Deposits in the Arabian-Nubian Shield: A Review

2.1 Classifications of Mineral Deposits 2.1.1 Introduction

2.1.2 Genetic Classification Scheme (used in this book)

· Magmatic Deposits (Chapter 3)

· Magmatic-Hydrothermal Deposits (Chapter 4)

· Hydrothermal Deposits (Chapters 5 and 6)

· Sedimentary/Surficial Deposits (Chapter 7)

2.2 Mineral Deposits in the ANS: An Overview

2.2.1. Afro-Arabian Domain

2.2.2. Eastern Domain

2.2.2. Southern Domain

2.2.3. Western Domain

Chapter 3: Orthomagmatic Deposits (Associated with mafic-ultramafic Rocks)

3.1 Introduction 3.2 Types of mafic-ultramafic rocks

3.2.1 Ophiolitic mafic-ultramafic complexes

3.2.2 Layered mafic-ultramafic complexes

3.2.3 Alaskan-type concentrically zoned mafic-ultramafic complexes

3.3 Magmatic Mineral Deposits in Saudi Arabia

3.3.1 Chromitite-PGE deposits in ophiolitic mafic-ultramafic complexes

3.3.2 Magmatic Cu-Ni-PGE sulfides and Fe-Ti oxides mineralization 3.4 Magmatic Mineral Deposits in Yemen

3.4.1 The Suwar-Wadi Qutabah Ni-Cu-Co-PGE occurrences

3.4.2 The Byhan Cu-Ni-PGE Occurrence

3.4.3 Al-Qabyta Occurrence

3.4.4 The Qaifa Occurrence

3.4.5 The Wadi Mabar area

3.4.6 The Al-Hamurah Cu-Ni occurrence

3.4.7 The Wadi Silbah occurrence

3.5 Magmatic Mineral Deposits in Eastern Desert of Egypt

3.5.1 Chromitite-PGE deposits in ophiolites

3.5.2 Non-ophiolitic Cu-Ni-PGE sulfide occurrences

3.5.3 Non-ophiolitic Fe-Ti oxide occurrences

3.6 Magmatic Mineral Deposits in Sudan

3.6.1 Ingessana Hills area

3.6.2 Qala En Nahal Umm Saqata Areas

3.6.3 The Nuba Mountains

3.6.4 The Red Sea Hills region

3.6.5 The Gebel Rahib occurrences

3.6.6 The Southern Sudan occurrences

3.6.7 The Northern Sudan occurrences

3.7 Magmatic Mineral Deposits in Eritrea

3.8 Magmatic Mineral Deposits in Ethiopia

3.8.1 PGE mineralization in Western Ethiopia

3.8.2 Southern Ethiopian Ni-Co-Cu mineralization

3.8.3 Chromitite-Fe-Ti mineralization in Western and Southern Ethiopia

Chapter 4: Magmatic-Hydrothermal (Intrusion-related) De...