Occurrence and Origin of Andalusite in Peraluminous Felsic Igneous
... request on the granite-research network for further contributions to expand the coverage. The result is a database of 111 felsic igneous rock samples, 108 of them containing andalusite, contributed by the authors of this paper. All authors have participated in the production of this paper through an ...
... request on the granite-research network for further contributions to expand the coverage. The result is a database of 111 felsic igneous rock samples, 108 of them containing andalusite, contributed by the authors of this paper. All authors have participated in the production of this paper through an ...
Occurrence and Origin of Andalusite in
... request on the granite-research network for further contributions to expand the coverage. The result is a database of 111 felsic igneous rock samples, 108 of them containing andalusite, contributed by the authors of this paper. All authors have participated in the production of this paper through an ...
... request on the granite-research network for further contributions to expand the coverage. The result is a database of 111 felsic igneous rock samples, 108 of them containing andalusite, contributed by the authors of this paper. All authors have participated in the production of this paper through an ...
Magmatic Apatite: A Powerful, Yet Deceptive
... and the volatile contents of the melt from which it crystallized? Does the presence of high-Cl apatite indicate that it crystallized from a high-Cl system? Not necessarily. Apatite with a given composition can crystallize from melts with highly variable F, Cl and OH concentrations depending on the e ...
... and the volatile contents of the melt from which it crystallized? Does the presence of high-Cl apatite indicate that it crystallized from a high-Cl system? Not necessarily. Apatite with a given composition can crystallize from melts with highly variable F, Cl and OH concentrations depending on the e ...
GEOLOGICAL SURVEY OF FINLAND Special Paper 48 2008 GTK
... maps, satellite images, and new regional and high resolution radiometric and magnetic airborne data. Field verification was performed at 20 000 observation sites, supported by nearly 30 000 digital photographs of outcrops and selected samples. Information on 650 mineral indications, occurrences and d ...
... maps, satellite images, and new regional and high resolution radiometric and magnetic airborne data. Field verification was performed at 20 000 observation sites, supported by nearly 30 000 digital photographs of outcrops and selected samples. Information on 650 mineral indications, occurrences and d ...
Evolution of Metamorphic Belts - CiteSeerX
... conditions permit. Andalusite and glaucophane are absent. The type metamorphic terrain is in the main part of the Grampian Highlands of Scotland, as studied by Barrow (1893, 1912), Tilley (1925), Harker (1932), Wiseman (1934), Snelling (1957), Chinner (I960), and others. The facies series of this ty ...
... conditions permit. Andalusite and glaucophane are absent. The type metamorphic terrain is in the main part of the Grampian Highlands of Scotland, as studied by Barrow (1893, 1912), Tilley (1925), Harker (1932), Wiseman (1934), Snelling (1957), Chinner (I960), and others. The facies series of this ty ...
the orivesi granite batholith, southern central finland
... which are in general euhedral, but oval (and mantled) megacrysts occur. The granite is extracted as dimensional stone ("Cardinal Red"/"Crystal Rose") from the southwestern part of the batholith. Additional potential sites for dimension stone are identified in same part of the batholith. The Orivesi ...
... which are in general euhedral, but oval (and mantled) megacrysts occur. The granite is extracted as dimensional stone ("Cardinal Red"/"Crystal Rose") from the southwestern part of the batholith. Additional potential sites for dimension stone are identified in same part of the batholith. The Orivesi ...
Cordierite in felsic igneous rocks: a synthesis
... For example, Ellis and Obata (1992) used reaction (3) to account for the formation of melt in the migmatite at Cooma, SE Australia, under conditions of T = 670-730~ and PH20 = 3.5--4.0 kbar. Cordierite produced by any of the above reactions is magmatic because it owes its existence entirely to ...
... For example, Ellis and Obata (1992) used reaction (3) to account for the formation of melt in the migmatite at Cooma, SE Australia, under conditions of T = 670-730~ and PH20 = 3.5--4.0 kbar. Cordierite produced by any of the above reactions is magmatic because it owes its existence entirely to ...
Fulltext - ETH E-Collection
... The third chapter aims to refine the timing and tectonic setting of the Jurassic ophiolites and the calc-alkaline series in the Apuseni Mountains. The South Apuseni ophiolites are the northernmost occurrence of ophiolites presently overlying the Dacia continental unit in Romania, Serbia, Macedonia ( ...
... The third chapter aims to refine the timing and tectonic setting of the Jurassic ophiolites and the calc-alkaline series in the Apuseni Mountains. The South Apuseni ophiolites are the northernmost occurrence of ophiolites presently overlying the Dacia continental unit in Romania, Serbia, Macedonia ( ...
Seamounts – characteristics, formation, mineral deposits and
... abyssal hills and isolated peaks) to be present while bathymetric data revealed more than 200,000 seamounts (h>100m) (Hillier and Watts, 2007). Later, Kitchingman et al. (2007) inferred 14,000 seamounts which they presume is a fraction of a larger global database of 50,000 or more seamounts. A compi ...
... abyssal hills and isolated peaks) to be present while bathymetric data revealed more than 200,000 seamounts (h>100m) (Hillier and Watts, 2007). Later, Kitchingman et al. (2007) inferred 14,000 seamounts which they presume is a fraction of a larger global database of 50,000 or more seamounts. A compi ...
Late Palaeozoic lam pro phyres and as so ci ated mafic subvolcanic
... in France, Spessart in Germany) and it is here that lamprophyres were first distinguished and described (Gümbel, 1874; Rosenbush, 1897; vide Rock, 1991). Lamprophyres have continued to attract the attention of exploration geologists as well as igneous petrologists from the first classic petrographic ...
... in France, Spessart in Germany) and it is here that lamprophyres were first distinguished and described (Gümbel, 1874; Rosenbush, 1897; vide Rock, 1991). Lamprophyres have continued to attract the attention of exploration geologists as well as igneous petrologists from the first classic petrographic ...
an example to sepiolite formation in volcanic belts by
... The rising up of the background starting from 20 = 18° shows the inclusion of amorphous material. Down the tuff horizon, alteration becomes more effective. KIB-6B specimen has been taken from this horizon, which is fine grained, light brown to beige colored when wet with a dotted texture. The most p ...
... The rising up of the background starting from 20 = 18° shows the inclusion of amorphous material. Down the tuff horizon, alteration becomes more effective. KIB-6B specimen has been taken from this horizon, which is fine grained, light brown to beige colored when wet with a dotted texture. The most p ...
Introduction to Metamorphism
... example grain size) and often in chemical composition in a rock. ...
... example grain size) and often in chemical composition in a rock. ...
Neotectonic and Paleoseismic Onshore-Offshore integrated study of the Carboneras Fault (Eastern
... Basin (located tens of kilometres to the north of the Carboneras fault) with leaching, rubefaction, clay formation and illuviation processes. The strongly calcified layers (a10 cm) interbedded within the A1 fans could have been caused by leaching and illuviation. Thick massive calcretes, some of the ...
... Basin (located tens of kilometres to the north of the Carboneras fault) with leaching, rubefaction, clay formation and illuviation processes. The strongly calcified layers (a10 cm) interbedded within the A1 fans could have been caused by leaching and illuviation. Thick massive calcretes, some of the ...
Granitic Pegmatites
... and within individual bodies, leading to the formation of such exotic mineral species as hafnon (HfSiO4) and tantite (Ta2O5). The process of rare-element enrichment in pegmatites appears to proceed, in an essentially closed system, from a small fraction of residual silicate liquid derived from a muc ...
... and within individual bodies, leading to the formation of such exotic mineral species as hafnon (HfSiO4) and tantite (Ta2O5). The process of rare-element enrichment in pegmatites appears to proceed, in an essentially closed system, from a small fraction of residual silicate liquid derived from a muc ...
geo.tu-freiberg.de - TU Bergakademie Freiberg
... further worked on field mapping projects in Saxony and Thuringia, who has documented many drillings and who has evaluated the coal deposits in Saxony as a competent expert. Furthermore, Cotta was interested in palaeobotany, in the distribution of species through time and in the reconstruction of the ...
... further worked on field mapping projects in Saxony and Thuringia, who has documented many drillings and who has evaluated the coal deposits in Saxony as a competent expert. Furthermore, Cotta was interested in palaeobotany, in the distribution of species through time and in the reconstruction of the ...
USGS Professional Paper 1697 - Alaska Resources Library and
... and geographic names for major regions. The major features, continued from the Neogene are (1) a series of continental-margin arcs and companion subduction-zone assemblages around the CircumNorth Pacific; (2) continuation of opening of major sedimentary basins behind major arcs; (3) in the eastern p ...
... and geographic names for major regions. The major features, continued from the Neogene are (1) a series of continental-margin arcs and companion subduction-zone assemblages around the CircumNorth Pacific; (2) continuation of opening of major sedimentary basins behind major arcs; (3) in the eastern p ...
Chapter 21: Metamorphism
... • Mild deformation, no igneous intrusions discovered • Fine-grained, high-temperature phases, glassy ash: very susceptible to metamorphic alteration • Metamorphic effects attributed to increased temperature and pressure due to burial • Diagenesis grades into the formation of zeolites, prehnite, ...
... • Mild deformation, no igneous intrusions discovered • Fine-grained, high-temperature phases, glassy ash: very susceptible to metamorphic alteration • Metamorphic effects attributed to increased temperature and pressure due to burial • Diagenesis grades into the formation of zeolites, prehnite, ...
Geology and gold mineralization of mesozoic rocks in the Pine
... Gold and copper sulfide mineralization occur in transitional veins and vein selvages that are interpreted to be a transition from early potassic and sodic alteration to the late sericitic alteration. Gold and sulfide minerals are commonly absent from the potassic and sodic alteration, and gold is ab ...
... Gold and copper sulfide mineralization occur in transitional veins and vein selvages that are interpreted to be a transition from early potassic and sodic alteration to the late sericitic alteration. Gold and sulfide minerals are commonly absent from the potassic and sodic alteration, and gold is ab ...
GLG101online_08A_Metamorphism_MCC_Leighty
... As a distance learning student, you need to explore and understand the content more independently than in a traditional class. As always, I will help guide you through this learning adventure. Remember, email Dr. Bob if you have any questions about today’s lecture ([email protected]). Le ...
... As a distance learning student, you need to explore and understand the content more independently than in a traditional class. As always, I will help guide you through this learning adventure. Remember, email Dr. Bob if you have any questions about today’s lecture ([email protected]). Le ...
Characteristics and Petrogenesis of Alaskan-Type Ultramafic
... this report provides a current and comprehensive description of the Alaskan-type ultramafic bodies. We utilize the combined field, petrographic, structural, and chemical data to (1) constrain the conditions of crystallization and accumulation of the ultramafic bodies, (2) evaluate the nature of the ...
... this report provides a current and comprehensive description of the Alaskan-type ultramafic bodies. We utilize the combined field, petrographic, structural, and chemical data to (1) constrain the conditions of crystallization and accumulation of the ultramafic bodies, (2) evaluate the nature of the ...
Petrology and geochemistry of plutonic rocks from the Polička and
... A b s t r a c t . Polička and Zábřeh Crystalline Complexes are units situated in the NE part of the Bohemian Massif. They are composed of similar metamorphosed volcanosedimentary sequences intruded by numerous plutonic bodies of Variscan age. The mafic, tonalite and granite plutonic suites were dist ...
... A b s t r a c t . Polička and Zábřeh Crystalline Complexes are units situated in the NE part of the Bohemian Massif. They are composed of similar metamorphosed volcanosedimentary sequences intruded by numerous plutonic bodies of Variscan age. The mafic, tonalite and granite plutonic suites were dist ...
`granitic` laver of the crust in the southern norwegian precambrian
... more obscure but whose layering is most likely inherited from original supracrustal rocks constitute the predominant rock type at deeper levels. In central Telemark, DoNs (1960, p. 56) has described the contact between the supracrustal rocks and the underlying granitic gneisses as being gradational ...
... more obscure but whose layering is most likely inherited from original supracrustal rocks constitute the predominant rock type at deeper levels. In central Telemark, DoNs (1960, p. 56) has described the contact between the supracrustal rocks and the underlying granitic gneisses as being gradational ...
Minerals and Rocks - The University Digital Library
... 2. Minerals – an Introduction 2.1 Definition of a mineral A mineral is a naturally formed solid; liquids and gases are therefore excluded. A mineral has a specific composition. It may be a naturally occurring element e.g. gold (Au), copper (Cu) or diamond (C). Minerals are, however, usually compound ...
... 2. Minerals – an Introduction 2.1 Definition of a mineral A mineral is a naturally formed solid; liquids and gases are therefore excluded. A mineral has a specific composition. It may be a naturally occurring element e.g. gold (Au), copper (Cu) or diamond (C). Minerals are, however, usually compound ...
Chapter 21: Metamorphism
... • Mild deformation, no igneous intrusions discovered • Fine-grained, high-temperature phases, glassy ash: very susceptible to metamorphic alteration • Metamorphic effects attributed to increased temperature and pressure due to burial ...
... • Mild deformation, no igneous intrusions discovered • Fine-grained, high-temperature phases, glassy ash: very susceptible to metamorphic alteration • Metamorphic effects attributed to increased temperature and pressure due to burial ...
Late Variscan (Carboniferous to Permian) environments in the
... (Manuscript received March 11, 2008; accepted in revised form June 12, 2008) Abstract: The Pennsylvanian-Cisuralian late-orogenic and post-orogenic paleoenvironments of the Circum Pannonian Region (CPR) include tectono-stratigraphic sequences developed from the Upper Bashkirian-Moscovian marine earl ...
... (Manuscript received March 11, 2008; accepted in revised form June 12, 2008) Abstract: The Pennsylvanian-Cisuralian late-orogenic and post-orogenic paleoenvironments of the Circum Pannonian Region (CPR) include tectono-stratigraphic sequences developed from the Upper Bashkirian-Moscovian marine earl ...
Ore genesis
The various theories of ore genesis explain how the various types of mineral deposits form within the Earth's crust. Ore genesis theories are dependent on the mineral or commodity.Ore genesis theories generally involve three components: source, transport or conduit, and trap. This also applies to the petroleum industry, which was first to use this methodology. Source is required because metal must come from somewhere, and be liberated by some process Transport is required first to move the metal-bearing fluids or solid minerals into the right position, and refers to the act of physically moving the metal, as well as chemical or physical phenomenon which encourage movement Trapping is required to concentrate the metal via some physical, chemical or geological mechanism into a concentration which forms mineable oreThe biggest deposits are formed when the source is large, the transport mechanism is efficient, and the trap is active and ready at the right time.