TGI-4 Intrusion-related Mineralization Project
... Mo, W and Sn, plus major sources of Au, Ag, and PGEs. Worldwide they account for over 50% of Cu and 95% of Mo production. In Canada, they account for over 40% of Cu and about 25% of Au production. Porphyry deposits are large, low- to medium-grade deposits in which mineralisation is hosted within and ...
... Mo, W and Sn, plus major sources of Au, Ag, and PGEs. Worldwide they account for over 50% of Cu and 95% of Mo production. In Canada, they account for over 40% of Cu and about 25% of Au production. Porphyry deposits are large, low- to medium-grade deposits in which mineralisation is hosted within and ...
Plate Tectonics Quiz - Mr. Long`s Classroom
... c. an anlaysis of soil at the plate boundaries. b. topographic mapping of mountain ranges. d. volcanic activity along coastlines South America and Africa are two continents separated by a large ocean. Scientists have found 200-million-year-old Mesosaurus fossils on both continents. What is the expla ...
... c. an anlaysis of soil at the plate boundaries. b. topographic mapping of mountain ranges. d. volcanic activity along coastlines South America and Africa are two continents separated by a large ocean. Scientists have found 200-million-year-old Mesosaurus fossils on both continents. What is the expla ...
Geology of the Cripple Creek gold
... the valley below this stop. Although Cripple Creek represents a world-class gold district, relatively little placer gold has been mined from the area. This is typical of many gold deposits associated with alkaline magmatism, around which placer deposits are commonly under-developed or lacking entire ...
... the valley below this stop. Although Cripple Creek represents a world-class gold district, relatively little placer gold has been mined from the area. This is typical of many gold deposits associated with alkaline magmatism, around which placer deposits are commonly under-developed or lacking entire ...
Lecture 1.
... under either continental crust or oceanic crust. Today, the Atlantic basin is actively spreading at the Mid-Atlantic Ridge. Only a small portion of the oceanic crust produced in the Atlantic is subducted. However, the plates making up the Pacific Ocean are experiencing subduction along many of their ...
... under either continental crust or oceanic crust. Today, the Atlantic basin is actively spreading at the Mid-Atlantic Ridge. Only a small portion of the oceanic crust produced in the Atlantic is subducted. However, the plates making up the Pacific Ocean are experiencing subduction along many of their ...
Magnesium isotopic composition of the lower continental crust
... mantle and hydrosphere requires knowledge of the bulk crustal Mg isotopic composition, which is heavily influenced by the deep crust. Here, we report Mg isotopic data for two sets of well-studied lower crustal granulite xenoliths from North Queensland, Australia (Chudleigh and McBride suites) [5, 6] ...
... mantle and hydrosphere requires knowledge of the bulk crustal Mg isotopic composition, which is heavily influenced by the deep crust. Here, we report Mg isotopic data for two sets of well-studied lower crustal granulite xenoliths from North Queensland, Australia (Chudleigh and McBride suites) [5, 6] ...
Structural Analysis of the Johnson Shear Zone in the Gemmell Lake
... The JSZ east of Gemmell Lake is characterized by the development of a mylonitic core within an approximately 300 m wide zone of intense crenulation cleavage and tight chevron folding (Beaumont-Smith and Rogge, 1999). West of Gemmell Lake, the kinematic framework remains consistent, although the shea ...
... The JSZ east of Gemmell Lake is characterized by the development of a mylonitic core within an approximately 300 m wide zone of intense crenulation cleavage and tight chevron folding (Beaumont-Smith and Rogge, 1999). West of Gemmell Lake, the kinematic framework remains consistent, although the shea ...
TAYSIDE – A LAND MOULDED FROM ROCK AND ICE
... World Famous Fish, Insects and Plants - Devonian and Carboniferous Between 410 – 290 Ma Scotland was located 10 – 20° south of the Equator. Rainforest covered much of the Midland Valley to the south and coral reefs flourished in the surrounding tropical seas. The sedimentary and igneous rocks of thi ...
... World Famous Fish, Insects and Plants - Devonian and Carboniferous Between 410 – 290 Ma Scotland was located 10 – 20° south of the Equator. Rainforest covered much of the Midland Valley to the south and coral reefs flourished in the surrounding tropical seas. The sedimentary and igneous rocks of thi ...
Platemovementrecapquiz 5.08MB 2017-03-29 12
... Geological evidence • The Appalachian Mountains of eastern North America are thought to link to the Caledonides of Ireland, Britain, Greenland, and Scandinavia and the Anti-Atlas Range in ...
... Geological evidence • The Appalachian Mountains of eastern North America are thought to link to the Caledonides of Ireland, Britain, Greenland, and Scandinavia and the Anti-Atlas Range in ...
A Digital Atlas of Terranes for the Northern Cordillera
... The framework of the Cordilleran orogen of northwestern North America is commonly depicted as a ‘collage’ of terranes – crustal blocks containing records of a variety of geodynamic environments including continental fragments, pieces of island arc crust and oceanic crust. The series of maps avail ...
... The framework of the Cordilleran orogen of northwestern North America is commonly depicted as a ‘collage’ of terranes – crustal blocks containing records of a variety of geodynamic environments including continental fragments, pieces of island arc crust and oceanic crust. The series of maps avail ...
GEOLOGY
... ANS: Paleozoic Era spans from around 541 to 252 million years ago and is the longest of the Phanerozoic areas. This era experienced some dramatic and drastic changes on geological, climatic and evolutionary fronts. Modern phyla first appeared during this era and there was the evolution of fish, arth ...
... ANS: Paleozoic Era spans from around 541 to 252 million years ago and is the longest of the Phanerozoic areas. This era experienced some dramatic and drastic changes on geological, climatic and evolutionary fronts. Modern phyla first appeared during this era and there was the evolution of fish, arth ...
A Digital Atlas of Terranes for the Northern Cordillera
... The framework of the Cordilleran orogen of northwestern North America is commonly depicted as a ‘collage’ of terranes – crustal blocks containing records of a variety of geodynamic environments including continental fragments, pieces of island arc crust and oceanic crust. The series of maps avail ...
... The framework of the Cordilleran orogen of northwestern North America is commonly depicted as a ‘collage’ of terranes – crustal blocks containing records of a variety of geodynamic environments including continental fragments, pieces of island arc crust and oceanic crust. The series of maps avail ...
Unit 1A Assessment Review
... 1. In what ways does the lithosphere differ from the asthenosphere? 2. How does the density of the material differ from the inner core to the crust? 3. What are 3 evidences of continental drift? 4. How does the age of the sea floor show that the tectonic plates move? 5. What causes plate tectonic to ...
... 1. In what ways does the lithosphere differ from the asthenosphere? 2. How does the density of the material differ from the inner core to the crust? 3. What are 3 evidences of continental drift? 4. How does the age of the sea floor show that the tectonic plates move? 5. What causes plate tectonic to ...
Geophysical and Geochemical Approaches
... Introduction: The presence of a broad zone of exhumed mantle at the West Iberia rifted margin is now well documented (e.g., Whitmarsh et al., 2001), but it remains unclear how widespread such margins are. The UK western approaches margin at Goban Spur (Figure 1) represents another generally amagmati ...
... Introduction: The presence of a broad zone of exhumed mantle at the West Iberia rifted margin is now well documented (e.g., Whitmarsh et al., 2001), but it remains unclear how widespread such margins are. The UK western approaches margin at Goban Spur (Figure 1) represents another generally amagmati ...
Oldest rocks, earliest life, heaviest impacts, and the Hadean
... To the south of the Isua supracrustal belt there is a terrain of several hundred km2 of well exposed, weakly deformed granitoid orthogneisses with zircon U–Pb dates as old as 3.82 Ga, which is regarded as their true age of emplacement (Nutman et al., 1999; Crowley, 2003). These orthogneisses are ric ...
... To the south of the Isua supracrustal belt there is a terrain of several hundred km2 of well exposed, weakly deformed granitoid orthogneisses with zircon U–Pb dates as old as 3.82 Ga, which is regarded as their true age of emplacement (Nutman et al., 1999; Crowley, 2003). These orthogneisses are ric ...
Essentials of Geology, 3rd edition
... Increased heat flow from magma expands and uplifts rocks. Rifting creates linear-fault block mountains and linear basins. ...
... Increased heat flow from magma expands and uplifts rocks. Rifting creates linear-fault block mountains and linear basins. ...
Advances in Environmental Biology
... Experimental melts derived from partial melting of different crustal source rocks such as felsic pelites, metagreywackes, gneisses and amphibolites fall into distinct fields based on the major oxide ratios or molar ratios [26]. Conclusion: The South Ardestan rocks belong to metaluminous, medium to h ...
... Experimental melts derived from partial melting of different crustal source rocks such as felsic pelites, metagreywackes, gneisses and amphibolites fall into distinct fields based on the major oxide ratios or molar ratios [26]. Conclusion: The South Ardestan rocks belong to metaluminous, medium to h ...
Module 6 Revision Guide Part One
... Rocks composed of randomly arranged interlocking crystals of a variety of different minerals are likely to be igneous. If the crystals are small, the magma from which the rock was formed cooled quickly and was probably erupted from a volcano. If the crystals are larger and easily visible, the magma ...
... Rocks composed of randomly arranged interlocking crystals of a variety of different minerals are likely to be igneous. If the crystals are small, the magma from which the rock was formed cooled quickly and was probably erupted from a volcano. If the crystals are larger and easily visible, the magma ...
Ms Martinez Plate Tectonic Note taking sheet
... and even into Southern British Columbia. These are volcanic mountains that are formed by subduction. The subduction zone is caused by two convergent plate boundaries. One convergent boundary exists between the oceanic Juan de Fuca plate and the continental North American plate. The other convergent ...
... and even into Southern British Columbia. These are volcanic mountains that are formed by subduction. The subduction zone is caused by two convergent plate boundaries. One convergent boundary exists between the oceanic Juan de Fuca plate and the continental North American plate. The other convergent ...
Name: 1 GEOL 104 Dinosaurs: A Natural History Geology
... Remember to use your basic Principles of Stratigraphy. These are: Steno’s Principles Original Horizontality: When sedimentary rocks are first deposited, they deposit as horizontal sheets ...
... Remember to use your basic Principles of Stratigraphy. These are: Steno’s Principles Original Horizontality: When sedimentary rocks are first deposited, they deposit as horizontal sheets ...
Sedimentary Rocks
... limestone is left behind. Over a long period oi" time, the deposits are built up into pillars, spikes, and other struculres. Limestone may also be produced through chemical changes in ocean water that cause grains of calcite to form. The small grains get larger as additional thin layers are deposite ...
... limestone is left behind. Over a long period oi" time, the deposits are built up into pillars, spikes, and other struculres. Limestone may also be produced through chemical changes in ocean water that cause grains of calcite to form. The small grains get larger as additional thin layers are deposite ...
Metasedimentary rocks, associated intrusions and tec
... greatest thicknesses of quartzite are located towards the northwest and extend along strike northeastwards from Songevatnet as far as Valle and the boundary with CambroSilurian sedimentary rocks of the Oslo Rift (Fig. 4), a distance of nearly 50 km. They terminate to the northwest rather abruptly ag ...
... greatest thicknesses of quartzite are located towards the northwest and extend along strike northeastwards from Songevatnet as far as Valle and the boundary with CambroSilurian sedimentary rocks of the Oslo Rift (Fig. 4), a distance of nearly 50 km. They terminate to the northwest rather abruptly ag ...
AIM: Introduce you to scientific study of the world`s oceans and seas
... •Recognize lithosphere by its relatively high seismic velocity & the relatively low attenuation of seismic waves ...
... •Recognize lithosphere by its relatively high seismic velocity & the relatively low attenuation of seismic waves ...
Great Lakes tectonic zone
The Great Lakes tectonic zone is bounded by South Dakota at its tip and heads northeast to south of Duluth, Minnesota, then heads east through northern Wisconsin, Marquette, Michigan, and then trends more northeasterly to skim the northern-most shores of lakes Michigan and Huron before ending in the Sudbury, Ontario, Canada, area.During the Late Archean Era the Algoman orogeny added landmass to the Superior province by volcanic activity and continental collision along a boundary that stretches from present-day South Dakota, U.S., into the Lake Huron region near Sudbury, Ontario, Canada.This crustal boundary is the Great Lakes tectonic zone. It is 1,400 km (870 mi) long, and separates the older Archean gneissic terrane to the south from younger Late Archean greenstone-granite terrane to the north.The zone is characterized by active compression during the Algoman orogeny (about 2,700 million years ago), a pulling-apart (extensional) tectonics (2,450 to 2,100 million years ago), a second compression during the Penokean orogeny (1,900 to 1,850 million years ago), a second extension during Middle Proterozoic time (1,600 million years ago) and minor reactivation during Phanerozoic time (the past 500 million years).Collision began along the Great Lakes tectonic zone (GLTZ) with the Algoman mountain-building event and continued for tens of millions of years. During the formation of the GLTZ, the gneissic Minnesota River Valley subprovince was thrust up onto the Superior province's edge as it consumed the Superior province's oceanic crust. Fragmentation of the Kenorland supercontinent began 2,450 million years ago and was completed by 2,100 million years ago. The Wyoming province is the continental landmass that is hypothesized to have rifted away from the southern Superior province portion of Kenorland, before moving rapidly west and docking with the Laurentia supercontinent 1,850 to 1,715 million years ago. Sedimentation from the GLTZ-rifting environment continued into the Penokean orogeny, which is the next major tectonic event in the Great Lakes region. Several earthquakes have been documented in Minnesota, Michigan's Upper Peninsula and Sudbury in the last 120 years along the GLTZ.