Keywords:
Geology.
;
Electronic books.
Type of Medium:
Online Resource
Pages:
1 online resource (786 pages)
Edition:
1st ed.
ISBN:
9783030729950
Series Statement:
Regional Geology Reviews Series
URL:
https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=6689034
Language:
English
Note:
Intro -- Preface -- Why This Book? -- Contents -- Contents -- About the Editors -- 1 The Arabian-Nubian Shield, an Introduction: Historic Overview, Concepts, Interpretations, and Future Issues -- Abstract -- 1.1 Introduction -- 1.2 ANS: Plate Tectonic Setting -- 1.3 ANS: Geologic Investigations -- 1.3.1 Historic Developments -- 1.3.2 Mineral Resources and Exploration -- 1.3.3 Geologic Mapping, Surveys, and Findings -- 1.4 ANS: Nomenclature -- 1.5 ANS: External Boundaries -- 1.5.1 ANS Northwestern Margin -- 1.5.2 ANS Southern Margin -- 1.5.3 ANS Eastern Margin -- 1.5.4 ANS Margins in the Southwestern Arabian Peninsula -- 1.5.5 ANS Margins in the Eastern Arabian Peninsula -- 1.5.6 ANS Northern Extent -- 1.6 ANS: Internal Divisions -- 1.6.1 Volcanic Arcs -- Where, How Many, and Origin? -- 1.6.2 Mineral Belts: An Aid to Metallogenic Analysis and Exploration Targeting -- 1.6.3 Structural or Tectonic Belts and Domains -- 1.6.4 Divisions in the Egyptian Eastern Desert -- 1.6.5 Tectonostratigraphic Terranes -- 1.6.6 Isotopic Domains -- 1.6.7 Inherited Zircons -- 1.7 Concluding Comments -- Acknowledgements -- References -- 2 The Boundary Between the Saharan Metacraton and the Arabian Nubian Shield: Insight from Ediacaran Shoshonitic Granites of the Nuba Mountains (Sudan): U-Pb SHRIMP Zircon Dating, Geochemistry and Sr-Nd Isotope Constraints -- Abstract -- 2.1 Introduction -- 2.2 Granitoids in the ANS and the SmC and Change in Stress Regime -- 2.3 The SmC-ANS Boundary in Sudan -- 2.4 Geological Setting and Petrography -- 2.5 U-Pb SHRIMP Dating of Zircon -- 2.5.1 Analytical Techniques -- 2.5.2 Results -- 2.6 Geochemistry of the Late-Orogenic Granitoids -- 2.6.1 Analytical Techniques -- 2.6.2 Major and Trace Elements Chemistry -- 2.7 Sr and Nd Isotopes -- 2.7.1 Analytical Techniques -- 2.7.2 Rb-Sr and Sm-Nd Isotopic Results -- 2.8 Discussion.
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2.8.1 Lithochemistry and Structural Characterization of the Nuba Post-collisional Plutons -- 2.8.2 The Source of the Parental Magma of the Nuba Post-collisional Plutons -- 2.8.3 Timing of Magmatism, Metamorphism and Regional Correlations -- 2.8.4 Implications for the Boundary of the Saharan Metacraton in Southern Sudan -- 2.9 Conclusions -- Acknowledgements -- References -- 3 The Southern Part of the Arabian-Nubian Shield in Kenya and Tanzania -- Abstract -- 3.1 Introduction -- 3.2 Geological Overview -- 3.3 Lithology, Formation Ages and Tectonic Setting -- 3.3.1 Sobo Unit -- 3.3.2 Galana Unit -- 3.3.3 Sagala Unit -- 3.3.4 Kinyjki Unit/Kasigau Group -- 3.3.5 Kurase Group/Eastern Granulites Metasediments -- 3.3.6 Eastern Granulites Metamagmatics -- 3.4 Isotopic Constraints -- 3.5 Tectonics and Metamorphism -- 3.6 Interpretation -- 3.7 Discussion and Conclusions -- Acknowledgements -- References -- 4 Tectonic Evolution of the Pan-African Belt in Western Ethiopia, Southern Arabian-Nubian Shield -- Abstract -- 4.1 Introduction -- 4.2 Regional Geologic Setting -- 4.3 Lithology -- 4.3.1 Gimbi Terrane -- 4.3.2 Nejo Terrane -- 4.3.3 Asosa Terrane -- 4.3.4 Tulu Dimtu-Baruda Belt -- 4.3.5 Intrusive Rocks -- 4.3.6 Young Volcano-Sediments -- 4.4 Structures -- 4.4.1 Gimbi Terrane -- 4.4.2 Nejo Terrane -- 4.4.3 Asosa Terrane -- 4.4.4 Tulu Dimtu-Baruda Belt -- 4.4.5 NW-Trending Structures -- 4.5 Discussion and Summary -- 4.5.1 Structural Evolution -- 4.5.2 Tectonic Interpretation and Regional Correlation of Terranes -- Acknowledgements -- References -- 5 Neoproterozoic Crustal Evolution of the Northernmost Arabian-Nubian Shield, South Jordan -- Abstract -- 5.1 Introduction -- 5.2 Aqaba Complex -- 5.2.1 Metamorphic Suites -- 5.2.1.1 Abu Barqa Metamorphic Suite -- 5.2.1.2 Janub Metamorphic Suite (JMS) -- 5.2.1.3 Abu Saqa Schist -- 5.2.2 Gabbroids and Granitoids.
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5.2.2.1 Duheila Hornblendic Suite (DHS) -- 5.2.2.2 Rahma Foliated Suite (RFS) -- 5.2.2.3 Darba Tonalitic Suite -- 5.2.2.4 Urf Porphyritic Suite (UPS) -- 5.2.2.5 Rumman Suite (RS) -- 5.2.2.6 Yutum Suite (YS) -- 5.3 Araba Complex -- 5.3.1 Safi Group -- 5.3.1.1 Saramuj Conglomerate Formation (SCF) -- 5.3.1.2 Haiyala Volcaniclastic Formation (HVF) -- 5.3.2 The Araba Mafic Suite -- 5.3.3 Humrat-Feinan-Mubarak Suite (HFMS) -- 5.3.4 Aheimir Volcanic Suite (AVS) -- 5.4 Ediacaran Dike Swarms -- 5.5 Summary and Conclusions -- Acknowledgements -- References -- 6 Lithospheric Structure of the Arabian-Nubian Shield Using Satellite Potential Field Data -- Abstract -- 6.1 Introduction -- 6.2 Data -- 6.3 Methodology -- 6.3.1 EHGA Method -- 6.3.2 Parker-Oldenburg Method -- 6.4 Results -- 6.4.1 Edge Results -- 6.4.2 Moho and LAB Results -- 6.5 Discussion -- 6.6 Conclusions -- Acknowledgements -- References -- 7 Evolution of the Arabian Nubian Shield and Snowball Earth -- Abstract -- 7.1 Introduction -- 7.2 Snowball Earth and Late Neoproterozoic Glaciation -- 7.3 Overview of ANS and EAO Development -- 7.4 Expected Manifestations of Neoproterozoic Glaciations in the ANS and EAO -- 7.5 Evidence for Glaciation in the ANS -- 7.5.1 Evidence for Tonian (c. 780-755 Ma) Glaciation -- 7.5.1.1 sim780 Ma Diamictite in Eastern Sudan (Meritri Group) and Central Arabian Shield (Mahd Group) -- 7.5.1.2 sim750 Ma Ghamr and Amudan Volcanosedimentary Basins, Central Arabian Shield -- 7.5.2 Evidence for Sturtian Glaciation (sim717-659 Ma) -- 7.5.2.1 Ethiopia/Eritrea-Tambien Group -- 7.5.2.2 Banded Iron Formation of Egypt and Arabia -- 7.5.2.3 Atud Diamictite (Egypt) and Nuwaybah Formation (Zaam Group) (NW Arabia) -- 7.5.2.4 Um Zariq and Zaghara Formations, Sinai Peninsula, Egypt, Northern ANS -- 7.5.2.5 Hadiyah Group, NW Arabian Shield.
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7.5.3 Evidence for Marinoan (Onset sim650-639, to sim635 Ma) and Ediacaran (sim580-550 Ma) Glaciation -- 7.5.3.1 Post-amalgamation (Ediacaran) Basins -- 7.5.3.2 Gondwanan Margin Basins -- 7.5.3.3 Role of Glaciation in the Formation of the Afro-Arabian Peneplain -- 7.6 Conclusions -- Acknowledgements -- References -- 8 The Arabian-Nubian Shield Within the Neoproterozoic Plate Tectonic Circuit -- Abstract -- 8.1 Introduction -- 8.2 A Full-Plate Tectonic Reconstruction -- 8.3 The ANS Within the Northern 'East African Orogen' -- 8.4 The Mozambique Ocean, Azania and Afif-Abas -- 8.5 The Eastern Margin of the EAO (NW India to Oman) -- 8.6 The Arabian-Nubian Shield (ANS) -- 8.7 The Western Margin of the EAO (the Eastern Saharan Metacraton) -- 8.8 Discussion -- 8.9 Conclusions -- Acknowledgements -- References -- 9 Early Ensimatic Stage of the Arabian-Nubian Shield -- Abstract -- 9.1 Introduction -- 9.2 Rodinia Pre-rifting Configurations -- 9.2.1 SWEAT Model -- 9.2.2 "Missing-Link" Model -- 9.2.3 Other Models -- 9.3 Rodinia Rifting -- 9.4 Origins and Configurations of the Mozambique Ocean-Rift or Remnant? -- 9.5 Remnants of Rodinia Within the ANS -- 9.5.1 Rodinia Continental Signatures Within the ANS -- 9.5.2 Mozambique Ocean Signatures Within the ANS -- 9.5.2.1 Setting and Occurrence -- 9.5.2.2 Magma Type -- 9.5.2.3 Tectonic Setting -- 9.6 Conclusions and Open Questions -- References -- 10 Terrane Accretion Within the Arabian-Nubian Shield -- Abstract -- 10.1 Introduction -- 10.2 The Rationale -- 10.2.1 Terrane Terminology -- 10.2.2 Formation of Terranes -- 10.3 Formation and Amalgamation of Gondwana Supercontinent -- 10.3.1 Neoproterozoic Pan-African Orogeny -- 10.3.2 The East African Orogen (EAO) -- 10.4 The Arabian-Nubian Shield (ANS) -- 10.4.1 Terrane Analysis, Amalgamation, and Accretion of the ANS -- 10.4.2 Assembly of the ANS and Crustal Growth.
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10.5 Tectonic Models of the ANS -- 10.5.1 Earlier Models of Evolution of ANS -- 10.5.1.1 A Single Immature Island Arc Evolution (Island Arc-Accretion Model) -- 10.5.1.2 Successive Formation and Accretion of Ensimatic Island Arcs Model -- 10.5.1.3 Repeated Rifting of an Older Sialic Crust -- 10.5.1.4 Microplate Accretion Model -- 10.5.1.5 Reconstruction of the ANS Model -- 10.5.1.6 Pan-African Continental Margin Model -- 10.5.2 Recent Models of ANS Evolution: Arc-Accretion Model -- 10.6 Faults and Shear Zones in the ANS -- 10.7 Ophiolite Zones as Evidence for Sutures in the ANS -- 10.7.1 Arc-Arc Sutures -- 10.7.2 Arc-Continent Sutures -- 10.7.3 The Eastern Margin of the ANS -- 10.7.4 The Western Margin of the ANS -- 10.8 Post-accretionary Structures -- 10.9 Post-amalgamation Basins of the NE Arabian Shield -- 10.10 Conclusions -- References -- 11 Tonian/Cryogenian Island Arc Metavolcanics of the Arabian-Nubian Shield -- Abstract -- 11.1 Introduction -- 11.2 Island Arc Volcanism of the Northern Nubian Shield -- 11.2.1 Island Arc Volcanic Rocks of the Eastern Desert of Egypt -- 11.2.1.1 Island Arc Volcanic Rocks of North Eastern Desert (NED) -- 11.2.1.2 Island Arc Volcanic Rocks of Central Eastern Desert (CED) -- 11.2.1.3 Island Arc Volcanic Rocks of South Eastern Desert (SED) -- 11.2.1.4 Mineralization Related to Island Arc Volcanism of the Eastern Desert of Egypt -- 11.2.1.5 Age of the Younger Metavolcanic Rocks of the Eastern Desert -- 11.2.2 Island Arc Volcanic Rocks of Sinai -- 11.2.3 Geochemistry and Petrogenesis of Island Arc Volcanics in the Eastern Desert of Egypt -- 11.2.3.1 Geochemical Characters of Major, Trace and REEs -- 11.2.3.2 Tectonomagmatic Discrimination Plots -- 11.2.3.3 Petrogenesis -- (i) Tholeiitic Metavolcanics -- (ii) Calc-Alkaline Metavolcanics -- (iii) Felsic Metavolcanics.
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11.2.3.4 Stages of Island Arc Volcanicity in the Eastern Desert.
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