Magma Genesis in Orogenic Belts
... assimilation of xenoliths by stoping of country rocks GRANITIZATION; sediments changed to granite by invasion of volatile hot gases and solutions from depth along microfractures ie METASOMATIC ...
... assimilation of xenoliths by stoping of country rocks GRANITIZATION; sediments changed to granite by invasion of volatile hot gases and solutions from depth along microfractures ie METASOMATIC ...
Lecture 1: Climate and Geology of the Skeena River
... Intermontane Belt • High rates of uplift in Coast Belt/Coast Mountains • Intermontane Belt is extensional (pull-apart) with broad uplift ...
... Intermontane Belt • High rates of uplift in Coast Belt/Coast Mountains • Intermontane Belt is extensional (pull-apart) with broad uplift ...
CGC – Lets Get Physical! Canada`s Landforms
... Formed by igneous and metamorphic rock Good for mining (many minerals); Bad for farming (thin soil) Glaciers removed large amounts of soil/ clay/ rock/ and gravel from the Shield. • Today, most of the Shield is covered by a thin layer of soil (bedrock is visible in many places). ...
... Formed by igneous and metamorphic rock Good for mining (many minerals); Bad for farming (thin soil) Glaciers removed large amounts of soil/ clay/ rock/ and gravel from the Shield. • Today, most of the Shield is covered by a thin layer of soil (bedrock is visible in many places). ...
Evolution of the East African and related orogens, and the assembly
... issue cover these topics across a geographic area that extends over more than 7000 km, and a period of time that spans more than 500 million years. Many workers have integrated field, structural, geochronological, and satellite remote sensing studies with other data to derive the unique view of the ...
... issue cover these topics across a geographic area that extends over more than 7000 km, and a period of time that spans more than 500 million years. Many workers have integrated field, structural, geochronological, and satellite remote sensing studies with other data to derive the unique view of the ...
Chapter 7.4 Notes Deformation of the Earth`s Crust *Deformation
... Stike-Slip Fault: form when opposing forces cause rock to slip past each other sideways with little up/down motion. Ex. San Andres Fault in CA. ...
... Stike-Slip Fault: form when opposing forces cause rock to slip past each other sideways with little up/down motion. Ex. San Andres Fault in CA. ...
Appalachian Mountain Building
... Continental crust cannot be subducted into the mantle when two plates converge because of its relatively low density. Instead, the energy associated with the collision is transferred to the crust involved, which becomes highly folded and faulted. ...
... Continental crust cannot be subducted into the mantle when two plates converge because of its relatively low density. Instead, the energy associated with the collision is transferred to the crust involved, which becomes highly folded and faulted. ...
The metamorphic evolution of the Mozambique Belt in Central
... path, dominated by decompression during final stages of exhumation. The IBC segment of the Eastern Granulites forms a ‘beta’-shaped retrograde path accompanied by strike-slip tectonics at granulite facies metamorphic conditions. We interpret this highly dynamic initial cooling stage at a particular ...
... path, dominated by decompression during final stages of exhumation. The IBC segment of the Eastern Granulites forms a ‘beta’-shaped retrograde path accompanied by strike-slip tectonics at granulite facies metamorphic conditions. We interpret this highly dynamic initial cooling stage at a particular ...
Relative Age of Rocks
... Absolute or Relative? •Anthony is the youngest. •Melony is 4 years old. ...
... Absolute or Relative? •Anthony is the youngest. •Melony is 4 years old. ...
Petrogenesis of Oxidized Arfvedsonite Granite Gneiss from Dimra
... discriminations diagrams (Pearce et al., 1984; Maniar and Piccoli, 1989; Batchelor and Bowden, 1985) constrain the tectonic setting of the magma to be anorogenic, within plate, rift-related one. The REE compositions show moderately fractionated patterns with (La/Yb)N 2.57-10.5 and Eu/Eu* 0.16-0.70. ...
... discriminations diagrams (Pearce et al., 1984; Maniar and Piccoli, 1989; Batchelor and Bowden, 1985) constrain the tectonic setting of the magma to be anorogenic, within plate, rift-related one. The REE compositions show moderately fractionated patterns with (La/Yb)N 2.57-10.5 and Eu/Eu* 0.16-0.70. ...
Abstract
... The allochthonous cover then developed a vertical north-trending foliation in high-T/lowP conditions as it foundered among buoyant diapirs of remobilised granitoid basement. The nearconstant lateral spacing of the centres of these diapirs, their mushroom shapes, and the absence of contemporaneous vo ...
... The allochthonous cover then developed a vertical north-trending foliation in high-T/lowP conditions as it foundered among buoyant diapirs of remobilised granitoid basement. The nearconstant lateral spacing of the centres of these diapirs, their mushroom shapes, and the absence of contemporaneous vo ...
Abstract - La Tectonique de l`Asie
... The South China block (SCB) appeared in the Neoproterozoic (ca 900 Ma) by welding of the Yangtze and Cathaysia Archean-Paleoproterozoic cratons. The resulting Jiangnan belt is a collision orogen characterized by ophiolites, serpentinite melanges, and high-pressure metamorphisic rocks. This belt was ...
... The South China block (SCB) appeared in the Neoproterozoic (ca 900 Ma) by welding of the Yangtze and Cathaysia Archean-Paleoproterozoic cratons. The resulting Jiangnan belt is a collision orogen characterized by ophiolites, serpentinite melanges, and high-pressure metamorphisic rocks. This belt was ...
Abstract
... The Penokean volcanic belt, located in north-central Wisconsin and the south portion of the upper peninsula of Michigan, is one of the world’s most prolific base metal provinces. It is host to a large number of volcanogenic massive sulfide (VMS) deposits and prospects, including the world-class Cran ...
... The Penokean volcanic belt, located in north-central Wisconsin and the south portion of the upper peninsula of Michigan, is one of the world’s most prolific base metal provinces. It is host to a large number of volcanogenic massive sulfide (VMS) deposits and prospects, including the world-class Cran ...
THE EARTH`S STRUCTURE
... Geology is the study of the earth, including its structure, rocks, minerals, history, and the forces that affect it. The Earth’s surface has not always had its present form; it has changed over time. The three main layers of the Earth, the crust, mantle, and core, are all made of different materials ...
... Geology is the study of the earth, including its structure, rocks, minerals, history, and the forces that affect it. The Earth’s surface has not always had its present form; it has changed over time. The three main layers of the Earth, the crust, mantle, and core, are all made of different materials ...
The Sevier Orogeny The Sevier orogeny took place at about the
... The Sevier Orogeny The Sevier orogeny took place at about the same time as the Laramide orogeny towards the end of the Cretacious and into the Tertiary from ~70-35 Ma. The Sevier orogeny happened largely due to the same regional stresses that created the Laramide. What distinguishes the Sevier from ...
... The Sevier Orogeny The Sevier orogeny took place at about the same time as the Laramide orogeny towards the end of the Cretacious and into the Tertiary from ~70-35 Ma. The Sevier orogeny happened largely due to the same regional stresses that created the Laramide. What distinguishes the Sevier from ...
The Coastal Plain Province
... Largest of Virginia's physiographic provinces, the Piedmont extends from Virginia's "fall line" west to the Blue Ridge Mountains. Elevations range from around 100 feet in the east to more than 1,000 feet in the foothills of the Blue Ridge. Metamorphosed rocks characterize this region: schists, gneis ...
... Largest of Virginia's physiographic provinces, the Piedmont extends from Virginia's "fall line" west to the Blue Ridge Mountains. Elevations range from around 100 feet in the east to more than 1,000 feet in the foothills of the Blue Ridge. Metamorphosed rocks characterize this region: schists, gneis ...
A submissão dos trabalhos deverá ser feita até 20 de março de 2011
... Lineament, and the close relationship with high-grade metamorphic rocks has drawn attention of many researchers for interpreting its tectonic setting. The evolution of this plutonic activity has been interpreted as the record of a continental magmatic arc around 650-610 Ma (Fetter et al., 2003), and ...
... Lineament, and the close relationship with high-grade metamorphic rocks has drawn attention of many researchers for interpreting its tectonic setting. The evolution of this plutonic activity has been interpreted as the record of a continental magmatic arc around 650-610 Ma (Fetter et al., 2003), and ...
5 THE EARTH`S CRUST 5.1 Text 5 Most mineral resources are
... composition. Minerals in the Earth's crust are concentrated into specific groups which are called rocks. Two distinctly different types of crust are recognized: oceanic and continental. Since it is difficult to investigate the floor of the ocean the composition of the oceanic crust is not known comp ...
... composition. Minerals in the Earth's crust are concentrated into specific groups which are called rocks. Two distinctly different types of crust are recognized: oceanic and continental. Since it is difficult to investigate the floor of the ocean the composition of the oceanic crust is not known comp ...
PowerPoint Presentation - How and why does subduction occur?
... India diverges from antarctica but converges on Asia India sutures to Asia ...
... India diverges from antarctica but converges on Asia India sutures to Asia ...
Assignment 5 (METHAMORPHIC ROCKS)
... temperature and high pressure. It takes place deep within the crust. This type of metamorphism results in foliated rocks and form the center core of mountain ranges. The contact metamorphism takes place due to intruding magma. The heat is more important mechanism. Non- foliated rocks are formed due ...
... temperature and high pressure. It takes place deep within the crust. This type of metamorphism results in foliated rocks and form the center core of mountain ranges. The contact metamorphism takes place due to intruding magma. The heat is more important mechanism. Non- foliated rocks are formed due ...
Field Mapping of the Redrock Area, Burro Mountains, southwest
... Paleoproterozoic sedimentary rocks in the Burro Mountains, southern Mazatzal province, have an unknown depositional age, depositional setting, and source region, and they were subsequently metamorphosed by one or all of the magmatic events that occurred at 1.63 Ga, 1.46 Ga, and 1.25 Ga. The main goa ...
... Paleoproterozoic sedimentary rocks in the Burro Mountains, southern Mazatzal province, have an unknown depositional age, depositional setting, and source region, and they were subsequently metamorphosed by one or all of the magmatic events that occurred at 1.63 Ga, 1.46 Ga, and 1.25 Ga. The main goa ...
Lower arc crust– A review of some important
... the type and age of the arc; therefore lower crust is a different target from one researcher to another; • The deep crust is the area where petrologic vestiges of mantle-derived melt are abundant and their diversification, segregation and interaction products with local upper plate are preserved; • ...
... the type and age of the arc; therefore lower crust is a different target from one researcher to another; • The deep crust is the area where petrologic vestiges of mantle-derived melt are abundant and their diversification, segregation and interaction products with local upper plate are preserved; • ...
Mud Volcanism and Cold Seepages in the Peri
... The broader region of the Adriatic sea is characterised by a sequence of magmatism-related events from the (pre)-Mesozoic through Cenozoic age. The triassic magmatism and jurassic ophiolites formed at the margins of the Adria plate promontory. The cenozoic tectonomagmatic evolution of the central-we ...
... The broader region of the Adriatic sea is characterised by a sequence of magmatism-related events from the (pre)-Mesozoic through Cenozoic age. The triassic magmatism and jurassic ophiolites formed at the margins of the Adria plate promontory. The cenozoic tectonomagmatic evolution of the central-we ...
Proterozoic geology of the Wet Mountains, Colorado
... The Silver Plume intrusive episode is characterized by high potassium, high Fe/Mg, marginally metaluminous to peraluminous granites, several of which show an unexpected foliation. Leucogranites (granites of William Creek [1486 Ma], Bear Creek, Cliff Creek) formed by in situ melting of metasedimentar ...
... The Silver Plume intrusive episode is characterized by high potassium, high Fe/Mg, marginally metaluminous to peraluminous granites, several of which show an unexpected foliation. Leucogranites (granites of William Creek [1486 Ma], Bear Creek, Cliff Creek) formed by in situ melting of metasedimentar ...
Os isotopic compositions of basaltic andesites and hawaiites of the
... analysed for their Re and Os concentrations and isotopic compositions. Osmium concentrations range from about 10 ppt for the whole-rock powders to over 500 ppt for an olivine separate. Rhenium concentrations vary from 300-500 ppt for whole-rocks and olivine separates to several parts-per-billion for ...
... analysed for their Re and Os concentrations and isotopic compositions. Osmium concentrations range from about 10 ppt for the whole-rock powders to over 500 ppt for an olivine separate. Rhenium concentrations vary from 300-500 ppt for whole-rocks and olivine separates to several parts-per-billion for ...
Baltic Shield
The Baltic Shield (sometimes referred to as the Fennoscandian Shield) is located in Fennoscandia (Norway, Sweden and Finland), northwest Russia and under the Baltic Sea. The Baltic Shield is defined as the exposed Precambrian northwest segment of the East European Craton. It is composed mostly of Archean and Proterozoic gneisses and greenstones which have undergone numerous deformations through tectonic activity (see Geology of Fennoscandia map [1]). The Baltic Shield contains the oldest rocks of the European continent. The lithospheric thickness is about 200-300 km. During the Pleistocene epoch, great continental ice sheets scoured and depressed the shield's surface, leaving a thin covering of glacial material and innumerable lakes and streams. The Baltic Shield is still rebounding today following the melting of the thick glaciers during the Quaternary Period.