sequences
... – a southern equatorial position during the Cambrian – to north temperate latitudes – by the end of the Silurian Period ...
... – a southern equatorial position during the Cambrian – to north temperate latitudes – by the end of the Silurian Period ...
No Slide Title
... – in southeast Missouri are Cambrian dolostones, – although some Ordovician rocks contain these metals as well ...
... – in southeast Missouri are Cambrian dolostones, – although some Ordovician rocks contain these metals as well ...
The 2.69 GA Paringa basalts: Crustal recycling into the
... are compositionally distinct from Mg-rich continental flood basalts that feature greater contents of Ti, and other incompatible elements, with fractionated HREE, or boninites, picrites, or medium-K basalts from intraoceanic arcs. Rather, these basalts are interpreted to result from recycling of olde ...
... are compositionally distinct from Mg-rich continental flood basalts that feature greater contents of Ti, and other incompatible elements, with fractionated HREE, or boninites, picrites, or medium-K basalts from intraoceanic arcs. Rather, these basalts are interpreted to result from recycling of olde ...
Ch 10 ppt
... • Evidence for the Taconic orogeny • The remnants of the mountains The remains of a large clastic wedge, • detrital sediments adjacent to an uplifted area • thinner and finer grained away from the source area, • eventually grading into the carbonate cratonic facies • The clastic wedge resulting from ...
... • Evidence for the Taconic orogeny • The remnants of the mountains The remains of a large clastic wedge, • detrital sediments adjacent to an uplifted area • thinner and finer grained away from the source area, • eventually grading into the carbonate cratonic facies • The clastic wedge resulting from ...
CHAPTER 8 - TIME AND GEOLOGY
... 5. The earliest stage in the development of North America (Stage 1) spans the time from 4 to 2.5 billion years ago when an ancient continent called Arctica existed. The Slave and Superior Provinces formed part of Arctica and now host much of Canada’s mineral wealth. Stage 2 involves the time period ...
... 5. The earliest stage in the development of North America (Stage 1) spans the time from 4 to 2.5 billion years ago when an ancient continent called Arctica existed. The Slave and Superior Provinces formed part of Arctica and now host much of Canada’s mineral wealth. Stage 2 involves the time period ...
Chapter 11: The Archean Eon of Precambrian Time
... deep water marine (graywacke, BIFs, volcanic seds) terrestrial/shallow marine some quartz sandstone some carbonates examples: Witwatersand sequence/Pongola Supergroup ...
... deep water marine (graywacke, BIFs, volcanic seds) terrestrial/shallow marine some quartz sandstone some carbonates examples: Witwatersand sequence/Pongola Supergroup ...
Sample pages 2 PDF
... The northwestern Wyoming Craton and the Granite Mountain region of central Wyoming include outcrops of 3.4–3.2 Ga rocks (Mueller and Frost 2006) and evidence from Nd and Pb isotopic indices suggesting 3.6–4.0 Ga precursor source terrains (Wooden and Mueller 1988; Frost and Frost 1993; Mueller and Fr ...
... The northwestern Wyoming Craton and the Granite Mountain region of central Wyoming include outcrops of 3.4–3.2 Ga rocks (Mueller and Frost 2006) and evidence from Nd and Pb isotopic indices suggesting 3.6–4.0 Ga precursor source terrains (Wooden and Mueller 1988; Frost and Frost 1993; Mueller and Fr ...
The lithosphere, geodynamics and Archean mineral systems
... 34th International Geological Congress Unearthing our Past and Future — Resourcing Tomorrow ...
... 34th International Geological Congress Unearthing our Past and Future — Resourcing Tomorrow ...
Key Words: Plate Tectonics, Structural Geology, Orogenesis
... belts) and their role in continental growth and collisional orogenisis. Toward this goal, I am, together with my students and collaborators, involved in projects mapping and studying oroclines on Vancouver Island, Alaska, South Africa, the central and western Mediterranean (including the Western Alp ...
... belts) and their role in continental growth and collisional orogenisis. Toward this goal, I am, together with my students and collaborators, involved in projects mapping and studying oroclines on Vancouver Island, Alaska, South Africa, the central and western Mediterranean (including the Western Alp ...
Isostasy and structure of the lower crust and upper mantle in the
... Two Archaean cratons, the Pilbara and Yilgarn Cratons, crop out in Western Australia (Gee, 1979a); their outcrop areas in the northwest part of the State are shown in Figure 1 of Drummond (1981, this issue). Following Gee (1979b), a 'block' is taken as the exposed part of a stabilised 'craton'. Brie ...
... Two Archaean cratons, the Pilbara and Yilgarn Cratons, crop out in Western Australia (Gee, 1979a); their outcrop areas in the northwest part of the State are shown in Figure 1 of Drummond (1981, this issue). Following Gee (1979b), a 'block' is taken as the exposed part of a stabilised 'craton'. Brie ...
Thinning and Accretion of Deep Lithosphere in North China Block
... the North China landmass is highly heterogeneous in chemical composition, and attributed it to the modification by crustal components recycled into the depth via variable ways during the interactions of the North China craton with its surrounding plates. This has greatly improved the understanding t ...
... the North China landmass is highly heterogeneous in chemical composition, and attributed it to the modification by crustal components recycled into the depth via variable ways during the interactions of the North China craton with its surrounding plates. This has greatly improved the understanding t ...
Questions For Review KEY
... adjusting the relative amounts of crust and denser mantle in the column of rock so as to restore equilibrium. ...
... adjusting the relative amounts of crust and denser mantle in the column of rock so as to restore equilibrium. ...
World-class Archean orogenic gold deposits, eastern Yilgarn Craton
... systematics, and (iv) various aspects of fluid and ore chemistry (oxidation state, gold fineness). Athough Archean lode-gold deposits are predominantly hosted in mafic-ultramafic extrusive and intrusive rocks (Groves et al. 1995, Hagemann & Cassidy 2000, 2001), it is clear that all lithologies in th ...
... systematics, and (iv) various aspects of fluid and ore chemistry (oxidation state, gold fineness). Athough Archean lode-gold deposits are predominantly hosted in mafic-ultramafic extrusive and intrusive rocks (Groves et al. 1995, Hagemann & Cassidy 2000, 2001), it is clear that all lithologies in th ...
David Foster - University of Florida Paul Mueller
... intrusion in the craton? • Is the Yellowstone Hot Spot a deep mantle plume? • How diffuse is the plate boundary of western North American? • What is driving modern extension and seismicity? • Why are the Northern Rocky Mountains still at high elevation? • How has the Cenozoic-Recent magmatism in the ...
... intrusion in the craton? • Is the Yellowstone Hot Spot a deep mantle plume? • How diffuse is the plate boundary of western North American? • What is driving modern extension and seismicity? • Why are the Northern Rocky Mountains still at high elevation? • How has the Cenozoic-Recent magmatism in the ...
Geochemistry of fine-grained clastic sedimentary rocks of the
... Abstract The Neoproterozoic Ikorongo Group, which lies unconformably on the late Archaean Nyanzian Supergroup of the Tanzania Craton, is comprised of conglomerates, quartzites, shales, siltstones, red sandstones with rare flagstones and gritstones and is regionally subdivided into four lithostratigr ...
... Abstract The Neoproterozoic Ikorongo Group, which lies unconformably on the late Archaean Nyanzian Supergroup of the Tanzania Craton, is comprised of conglomerates, quartzites, shales, siltstones, red sandstones with rare flagstones and gritstones and is regionally subdivided into four lithostratigr ...
Geological Terranes of Indian Continent
... The arcuate Himalaya province, forming the wide northern fringe of the Indian continent, is a product of docking of India with Asia—which happened sometime in the time interval 65–55 Ma. In the north, its frontier is defined by the zone of Asia-India welding characterized by squeezed up, strongly de ...
... The arcuate Himalaya province, forming the wide northern fringe of the Indian continent, is a product of docking of India with Asia—which happened sometime in the time interval 65–55 Ma. In the north, its frontier is defined by the zone of Asia-India welding characterized by squeezed up, strongly de ...
EPSC233ArcheanEarth2
... This magma is less dense than the mantle and tends to rise through faults (large cracks in the rocks)... This magma may crystallize near the Earth’s surface and be remelted again to produce a more felsic composition, more like continental crust. ...
... This magma is less dense than the mantle and tends to rise through faults (large cracks in the rocks)... This magma may crystallize near the Earth’s surface and be remelted again to produce a more felsic composition, more like continental crust. ...
Material properties and microstructure from
... 2.1 and 2.0 Ga. However, in the east parte the syenite is placed as tabular bodies and shows gneissic texture, while in the west parte they are related to pull-part system and developt only magmatic textures. The UMPB syeinte occur as wide single batholith (6,000 km2), the Guanambi Batholith (GB), d ...
... 2.1 and 2.0 Ga. However, in the east parte the syenite is placed as tabular bodies and shows gneissic texture, while in the west parte they are related to pull-part system and developt only magmatic textures. The UMPB syeinte occur as wide single batholith (6,000 km2), the Guanambi Batholith (GB), d ...
Read an excerpt from the book
... have separate histories and were brought together to form the superterrane Habsia in the Early Jurassic (orogenic event A) recorded by a large granite pluton that stitched them together. These were covered by sediments that accumulated in what is called a successor basin and referred to as an overla ...
... have separate histories and were brought together to form the superterrane Habsia in the Early Jurassic (orogenic event A) recorded by a large granite pluton that stitched them together. These were covered by sediments that accumulated in what is called a successor basin and referred to as an overla ...
Proterozoic Rocks
... • Deformation and metamorphism ~1.1 Gy • Probably represents the opening and closing of an ocean • Rapikivi granites ~1.4 Gy represent rift ...
... • Deformation and metamorphism ~1.1 Gy • Probably represents the opening and closing of an ocean • Rapikivi granites ~1.4 Gy represent rift ...
PDF 3.2 MB - users.monash.edu.au
... Yilgarn Craton of uniform data quality, highlight relationships between geologic complexity and the location and size of Archaean orogenic-gold deposits. In the Kalgoorlie Terrane and Laverton Tectonic Zone, the largest gold deposits occur along steep gradients defined by fractal-dimension values. Th ...
... Yilgarn Craton of uniform data quality, highlight relationships between geologic complexity and the location and size of Archaean orogenic-gold deposits. In the Kalgoorlie Terrane and Laverton Tectonic Zone, the largest gold deposits occur along steep gradients defined by fractal-dimension values. Th ...
THEME 8: The Mokolian Era Namaqualand Metamorphic Complex
... metasediments north of Groblershoop in Northern Cape. 1350-1150 Ma, 2000m thick. Koras Gp: alluvial sedimentary rocks, lavas, pyroclastics, deposited in grabens. 1180-1080 Ma ...
... metasediments north of Groblershoop in Northern Cape. 1350-1150 Ma, 2000m thick. Koras Gp: alluvial sedimentary rocks, lavas, pyroclastics, deposited in grabens. 1180-1080 Ma ...
No Slide Title
... Early Paleozoic Evolution of North America • The geologic history of the North American craton may be divided into two parts – relatively stable continental interior over which epeiric seas transgressed and regressed – mobile belts where mountain building occurred ...
... Early Paleozoic Evolution of North America • The geologic history of the North American craton may be divided into two parts – relatively stable continental interior over which epeiric seas transgressed and regressed – mobile belts where mountain building occurred ...
Yilgarn Craton
The Yilgarn Craton is a large craton that constitutes the bulk of the Western Australian land mass. It is bounded by a mixture of sedimentary basins and Proterozoic fold and thrust belts. Zircon grains in the Jack Hills, Narryer Terrane have been dated at ~4.27 Ga, with one detrital zircon dated as old as 4.4 Ga.