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1000 results for “silicatefondue”
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I've seen sphene! (Sounds better than "the rock is tight with titanite")
Centimeter-size black sphene (titanite) with apatite (dark brown) and orthoclase feldspar (light brown). Folding pocket knife for scale.
From the Bancroft locality in Ontario, Canada. Grenville-aged (~1.2± billion years)
#MinCup24 #Titanite #Sphene #Bancroft #Ontario #Geology -
I've seen sphene! (Sounds better than "the rock is tight with titanite")
Centimeter-size black sphene (titanite) with apatite (dark brown) and orthoclase feldspar (light brown). Folding pocket knife for scale.
From the Bancroft locality in Ontario, Canada. Grenville-aged (~1.2± billion years)
#MinCup24 #Titanite #Sphene #Bancroft #Ontario #Geology -
I've seen sphene! (Sounds better than "the rock is tight with titanite")
Centimeter-size black sphene (titanite) with apatite (dark brown) and orthoclase feldspar (light brown). Folding pocket knife for scale.
From the Bancroft locality in Ontario, Canada. Grenville-aged (~1.2± billion years)
#MinCup24 #Titanite #Sphene #Bancroft #Ontario #Geology -
I've seen sphene! (Sounds better than "the rock is tight with titanite")
Centimeter-size black sphene (titanite) with apatite (dark brown) and orthoclase feldspar (light brown). Folding pocket knife for scale.
From the Bancroft locality in Ontario, Canada. Grenville-aged (~1.2± billion years)
#MinCup24 #Titanite #Sphene #Bancroft #Ontario #Geology -
Why study and synthesize #Ringwoodite? Experiments (below, a diamond anvil pressure device that's transparent to visible light; Schmandt et al, 2014) and natural samples from the Earth's mantle (see ksircombe's posts: https://aus.social/@ksircombe/113124213223248687) suggest that there's an ocean or two worth of water stored in Earth's Ringwoodite. It's likely kept the planet habitable for the last 4.5 billion years.
Plus Ringwoodite is more Blue than #Kyanite !
#MinCup24 #Mantle #PlateTectonics #BlueMinerals -
Why study and synthesize #Ringwoodite? Experiments (below, a diamond anvil pressure device that's transparent to visible light; Schmandt et al, 2014) and natural samples from the Earth's mantle (see ksircombe's posts: https://aus.social/@ksircombe/113124213223248687) suggest that there's an ocean or two worth of water stored in Earth's Ringwoodite. It's likely kept the planet habitable for the last 4.5 billion years.
Plus Ringwoodite is more Blue than #Kyanite !
#MinCup24 #Mantle #PlateTectonics #BlueMinerals -
Why study and synthesize #Ringwoodite? Experiments (below, a diamond anvil pressure device that's transparent to visible light; Schmandt et al, 2014) and natural samples from the Earth's mantle (see ksircombe's posts: https://aus.social/@ksircombe/113124213223248687) suggest that there's an ocean or two worth of water stored in Earth's Ringwoodite. It's likely kept the planet habitable for the last 4.5 billion years.
Plus Ringwoodite is more Blue than #Kyanite !
#MinCup24 #Mantle #PlateTectonics #BlueMinerals -
Why study and synthesize #Ringwoodite? Experiments (below, a diamond anvil pressure device that's transparent to visible light; Schmandt et al, 2014) and natural samples from the Earth's mantle (see ksircombe's posts: https://aus.social/@ksircombe/113124213223248687) suggest that there's an ocean or two worth of water stored in Earth's Ringwoodite. It's likely kept the planet habitable for the last 4.5 billion years.
Plus Ringwoodite is more Blue than #Kyanite !
#MinCup24 #Mantle #PlateTectonics #BlueMinerals -
Why study and synthesize #Ringwoodite? Experiments (below, a diamond anvil pressure device that's transparent to visible light; Schmandt et al, 2014) and natural samples from the Earth's mantle (see ksircombe's posts: https://aus.social/@ksircombe/113124213223248687) suggest that there's an ocean or two worth of water stored in Earth's Ringwoodite. It's likely kept the planet habitable for the last 4.5 billion years.
Plus Ringwoodite is more Blue than #Kyanite !
#MinCup24 #Mantle #PlateTectonics #BlueMinerals -
We can make #Ringwoodite but measuring the pressure is hard. Yingwei Fei (CIW, Fei et al, 2004) pioneered combining the experiment with simple cubic crystals with well known volume changes with pressure. The volume of these cubic crystals is measured with synchrotron x-rays at the same time as the Ringwoodite is forming.
#MinCup24 #Synchrotron #Mantle -
We can make #Ringwoodite but measuring the pressure is hard. Yingwei Fei (CIW, Fei et al, 2004) pioneered combining the experiment with simple cubic crystals with well known volume changes with pressure. The volume of these cubic crystals is measured with synchrotron x-rays at the same time as the Ringwoodite is forming.
#MinCup24 #Synchrotron #Mantle -
We can make #Ringwoodite but measuring the pressure is hard. Yingwei Fei (CIW, Fei et al, 2004) pioneered combining the experiment with simple cubic crystals with well known volume changes with pressure. The volume of these cubic crystals is measured with synchrotron x-rays at the same time as the Ringwoodite is forming.
#MinCup24 #Synchrotron #Mantle -
We can make #Ringwoodite but measuring the pressure is hard. Yingwei Fei (CIW, Fei et al, 2004) pioneered combining the experiment with simple cubic crystals with well known volume changes with pressure. The volume of these cubic crystals is measured with synchrotron x-rays at the same time as the Ringwoodite is forming.
#MinCup24 #Synchrotron #Mantle -
We can make #Ringwoodite but measuring the pressure is hard. Yingwei Fei (CIW, Fei et al, 2004) pioneered combining the experiment with simple cubic crystals with well known volume changes with pressure. The volume of these cubic crystals is measured with synchrotron x-rays at the same time as the Ringwoodite is forming.
#MinCup24 #Synchrotron #Mantle -
The Earth has a tremendous amount of #Ringwoodite, it's just difficult to get it to the surface unless encapsulated within another mineral. Making Ringwoodite big enough to see just requires a big press!
This is a 1500 ton press located at #Spring-8 in #Japan. It's bigger than it needs to be because it has a small gap in the WC anvils that allow synchrotron x-rays (intense, narrow beam) to penetrate the experiment, and because it's on actuators that position it to the micron.
#MinCup24 #Mantle -
The Earth has a tremendous amount of #Ringwoodite, it's just difficult to get it to the surface unless encapsulated within another mineral. Making Ringwoodite big enough to see just requires a big press!
This is a 1500 ton press located at #Spring-8 in #Japan. It's bigger than it needs to be because it has a small gap in the WC anvils that allow synchrotron x-rays (intense, narrow beam) to penetrate the experiment, and because it's on actuators that position it to the micron.
#MinCup24 #Mantle -
The Earth has a tremendous amount of #Ringwoodite, it's just difficult to get it to the surface unless encapsulated within another mineral. Making Ringwoodite big enough to see just requires a big press!
This is a 1500 ton press located at #Spring-8 in #Japan. It's bigger than it needs to be because it has a small gap in the WC anvils that allow synchrotron x-rays (intense, narrow beam) to penetrate the experiment, and because it's on actuators that position it to the micron.
#MinCup24 #Mantle -
The Earth has a tremendous amount of #Ringwoodite, it's just difficult to get it to the surface unless encapsulated within another mineral. Making Ringwoodite big enough to see just requires a big press!
This is a 1500 ton press located at #Spring-8 in #Japan. It's bigger than it needs to be because it has a small gap in the WC anvils that allow synchrotron x-rays (intense, narrow beam) to penetrate the experiment, and because it's on actuators that position it to the micron.
#MinCup24 #Mantle -
The Earth has a tremendous amount of #Ringwoodite, it's just difficult to get it to the surface unless encapsulated within another mineral. Making Ringwoodite big enough to see just requires a big press!
This is a 1500 ton press located at #Spring-8 in #Japan. It's bigger than it needs to be because it has a small gap in the WC anvils that allow synchrotron x-rays (intense, narrow beam) to penetrate the experiment, and because it's on actuators that position it to the micron.
#MinCup24 #Mantle -
#Ringwoodite is a second chance for #Spinel (which lost out to #Vivianite earlier). Ringwoodite has the chemistry of olivine (Mg2SiO4) but the crystal structure of spinel (MgAl2O4).
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#Ringwoodite is a second chance for #Spinel (which lost out to #Vivianite earlier). Ringwoodite has the chemistry of olivine (Mg2SiO4) but the crystal structure of spinel (MgAl2O4).
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#Ringwoodite is a second chance for #Spinel (which lost out to #Vivianite earlier). Ringwoodite has the chemistry of olivine (Mg2SiO4) but the crystal structure of spinel (MgAl2O4).
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#Ringwoodite is a second chance for #Spinel (which lost out to #Vivianite earlier). Ringwoodite has the chemistry of olivine (Mg2SiO4) but the crystal structure of spinel (MgAl2O4).
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#Ringwoodite is a second chance for #Spinel (which lost out to #Vivianite earlier). Ringwoodite has the chemistry of olivine (Mg2SiO4) but the crystal structure of spinel (MgAl2O4).
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A quartz-filled geode from Mont Lyall, Gaspe Peninsula, Quebec. These form in Devonian volcanics of the Chic-Choc mountains, when hot water percolates through cavities. The quarry is a pick-your-own-nodules, with a service to saw them open -no guarantees!
#Quartz #MinCup24 #MineralCup #Quebec #Geode #Geology -
Opaque #spinel is the main aluminum-bearing mineral in the Earth's upper mantle. Here surrounded by pale olivine brown orthopyroxene and green clinopyroxene.
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Christie Rowe (@keepitrheol) describing the planned Nevada earthquake alert system:
https://www.fox5vegas.com/video/2024/08/24/earthquake-alert-system-coming-nevada-using-network-300-seismic-monitors/RT from BlueSky
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Job posting; closes 15Sep24:
https://mcgill.wd3.myworkdayjobs.com/en-US/mcgill_careers/details/Faculty-Lecturer_JR0000056517This posting is for a faculty lecturer (not tenure-track) to teach structural geology, field geology methods, and related topics. Three-year term with the possibility of renewal. In person at McGill University, Montreal, Quebec, Canada.
#Geology #StructuralGeology #FieldGeology #McGillUniversity #Montreal #Canada
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@barrygoldman1 They're not all preserved in the same rock! The last metamorphic event recorded in this sample annealed out all the growth zoning in the major rock-forming minerals.
Some of the evidence is preserved in the younger tonalites that contain more resistant minerals like zircon...
#geology #metamorphism -
Plain light thin section (~ 4 cm wide)
Pale pink garnets (inclusion-rich cores and inclusion-free rims) surrounded by mostly biotite.From the Nuvvuagittuq formation near #Inukjuak Canada.
Coupled Sm-Nd isotopes suggest that the original rock (the protolith) may be as old as 4.3 billion years. This sample has been pervasively metamorphosed at least four times since then.