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gsa-mgpv-division.bsky.social
GSA's MGPV Division
@gsa-mgpv-division.bsky.social
50 followers 45 following 19 posts
Official Bluesky account of the Mineralogy, Geochemistry,
Petrology, & Volcanology (MGPV) Division of @geosociety.bsky.social‬. Follow us for the latest Division info.
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Reposted by GSA's MGPV Division
martinhajovsky.bsky.social
These are pictures of brown dwarf stars. You know what they’re also pictures of? #Perovskite, which rains down in their atmospheres. How cool is that? Very, very cool indeed! Vote for brown dwarf rain. Vote Perovskite! #MinCup25

Vote: www.mineralcup.org/2025/vote/r3...
Brown dwarf Gliese 229B, right, is a small companion to the cool, red star Gliese 229. Credit: NASA/S. Kulkarni/D. Golimowski Double brown dwarf system Luhman 16 is at the center of the larger image, which was taken by the NASA’s Wide-field Infrared Survey Explorer (WISE). Credit: NASA/JPL-Caltech/Gemini Observatory/AURA/NSF Perovskite, which rains down in brown dwarf atmospheres
September 26, 2025 at 1:45 PM
gsa-mgpv-division.bsky.social
#MinCup25 Quarterfinal 2 - ☀️ #Perovskite vs 🌸 #Tugtupite. A mineral empowering solar cells (and found in the rain in brown dwarf stars!) faces the vivid pink tenebrescent, fluorescent, and phosphorescent feldspathoid.

#minerals #mineralogy
September 26, 2025 at 2:39 PM
gsa-mgpv-division.bsky.social
#MinCup25 Quarterfinal 1: 🔷 #Haüyne vs 🩸 #Hematite. A fluorescent feldspathoid of brilliant blues meets the iron oxide that contributes to the iconic red color of Mars.

#minerals #mineralogy
September 25, 2025 at 12:59 PM
Reposted by GSA's MGPV Division
mineralsocamerica.bsky.social
NOTE: MSA Inaugural Annual Meeting: Feb, 16-18, 2026, Tucson, AZ, USA
This will follow the Tucson Gem and Mineral Show. On Feb. 17 and 18 there will be a series of talks and poster sessions. Abstracts due: Oct. 31. Registration will be through the MSA website at www.msaweb.org
September 25, 2025 at 12:50 PM
gsa-mgpv-division.bsky.social
#MinCup25 Round 2 Match 8 - ☢️ #Cuprosklodowskite vs 🖤 #Mannardite. A bright green uranium silicate named to honour Marie Sklodowska Curie vs the jet black barium-titanium-vanadium oxide.

#minerals #mineralogy
September 24, 2025 at 2:02 PM
Reposted by GSA's MGPV Division
sorosilicate.bsky.social
#kyanite in biotite gneiss from the Entia Dome, central Australia. Kyanite forms deep in the crust before it makes its way to the Earth’s surface, a slow and much more challenging journey than taenite’s fall through space. #MinCup25
September 23, 2025 at 1:04 AM
Reposted by GSA's MGPV Division
salvaterra.bsky.social
kyanite X taenite.

deep in the earth versus out of this world. I'm voting kyanite. go earth!

#MinCup25 #minerals #sciart
Illustration of two minerals competing in the round 2 match 7 of the Mineral Cup 2025. Kyanite versus taenite. The first one represented here as some deep blue crystal pins encrusted on another mineral, and the second is a cut of a metallic meteorite with a cross-hatched pattern.
September 23, 2025 at 12:31 PM
Reposted by GSA's MGPV Division
mineralsocamerica.bsky.social
Silicate liquid immiscibility in the Chang'e 5 lunar mare magmas: Constraints on the petrogenesis of lunar granitic rocks
Le Zhang, et al.
doi.org/10.2138/am-2...
Silicon-rich melt inclusions hosted in fayalite formed through late-stage silicate liquid immiscibility in lunar mare basaltic magmas.
September 23, 2025 at 11:46 AM
gsa-mgpv-division.bsky.social
#MinCup25 Round 2 Match 7: 💙 #Kyanite vs ☄️ #Taenite. A metamorphic aluminosilicate meets a meteoritic Fe–Ni alloy.

#minerals #mineralogy
September 23, 2025 at 2:37 PM
gsa-mgpv-division.bsky.social
#MinCup25 Round 2 Match 3: ⚖️ #Baryte vs 🩸 #Hematite. The heavyweight sulfate meets the iron oxide red.

#minerals #mineralogy
September 19, 2025 at 2:36 PM
gsa-mgpv-division.bsky.social
#MinCup25 Round 2 Match 1 - 🌊 #Pectolite, which forms in hydrothermal cavities in basalt, versus 🌀 #häuyne, the fluorescent feldspathoid.

#minerals #mineralogy
September 17, 2025 at 10:36 AM
Reposted by GSA's MGPV Division
doktrock.bsky.social
🚨Job Alert 🚨 The Department of #Geology at the University of Otago in #NewZealand invites applications for a faculty position (Lecturer – equivalent to Assistant Professor in North American academic systems) in Earth sciences or adjacent field. ⚒️🧪 #Geosciences

otago.taleo.net/careersectio...
Lecturer/Pūkenga - Geology
Click the link provided to see the complete job description.
otago.taleo.net
September 16, 2025 at 6:31 AM
Reposted by GSA's MGPV Division
glacierpique.bsky.social
Why is V so concentrated in crude oil and oil shales?

Anoxic waters, H2S reduction, formation of porphyrin complexes, precipitation, clay adsorption, shale deposition, mineralization.

Tiny, V-rich #Mannardite punches above its weight.
#MinCup25
#Porphyrins
Prism of black Mannardite contrast with white matrix. Image from mindat’s website, copyright Alessio Becucci Silver prism of Mannardite contrasts with white matrix. Image from mindat’s website, copyright Chinellato Matteo
September 16, 2025 at 1:55 AM
Reposted by GSA's MGPV Division
bowtiediene.bsky.social
Mannardite has a fun polarization simulation on www.mindat.org/min-2567.html. Also it contains vanadium. #MinCup25
A polarization simulation of Mannardite showing colorful grains.
September 16, 2025 at 1:56 AM
gsa-mgpv-division.bsky.social
#MinCup25 Round 1 Match 16: ❇️ #Paddlewheelite vs ◼️ #mannardite. An unusually complex carbonate vs a mineral sometimes mined as a vanadium ore.

#minerals #mineralogy
September 16, 2025 at 12:39 PM
Reposted by GSA's MGPV Division
vickyveritas.bsky.social
The Hoba meteorite was discovered in 1920 buried on a Namibian farm. It is an “ataxite” meteorite, an iron meteorite containing more than 16% nickel, and is composed primarily of #taenite. Hoba is the largest meteorite on earth, weighing more than 60 tons, yet left only a small crater. #MinCup25
Hoba meteorite | Weight, Namibia, & Facts | Britannica
Hoba meteorite, the largest intact meteorite, weighing about 60 tons, that has been found on Earth. It was discovered in 1920 on a farm called Hoba West, located 19 km (12 miles) west of Grootfontein ...
www.britannica.com
September 14, 2025 at 11:47 PM
gsa-mgpv-division.bsky.social
#MinCup25 Round 1, Match 15: 💫 #Taenite vs 🌍 #Nontronite. An iron-nickel meteorite alloy meets an iron-rich clay mineral.

#minerals #mineralogy
September 15, 2025 at 2:43 PM
gsa-mgpv-division.bsky.social
#MinCup25 Round 1 Match 13: 💎 #Topaz, a prized aluminosilicate gem, takes on 💙 #Kyanite, the blue indicator of metamorphism.

#minerals #mineralogy
September 13, 2025 at 3:07 PM
Reposted by GSA's MGPV Division
jraasch.bsky.social
#MinCup25

A vote for #molybdenite is a vote for geochronology!

Vote molybdenite today!

www.nature.com/articles/s41...
September 12, 2025 at 1:05 PM
Reposted by GSA's MGPV Division
salvaterra.bsky.social
here's zunyite X molybdenite on the #MinCup25 sketchbook

really torn about this choice but my hexagon vows take precedence over the polyhedra vows. 💍

#b&wart #sketchbook #sciart #minerals
sketchbook page photo with black and white pen drawings of two minerals: zunyite and molybdenite. both have nice geometric shapes on their crystals, one like a d4 and the other like hexagons
September 12, 2025 at 1:32 PM
gsa-mgpv-division.bsky.social
#MinCup25 Round 1 Match 12: 🔺 #Zunyite vs ⚙️ #Molybdenite. A rare aluminosilicate meets the chief molybdenum ore.

#minerals #mineralogy
September 12, 2025 at 2:12 PM
Reposted by GSA's MGPV Division
jaywen.bsky.social
🚨 Call for Judges!

At GSA 2025 in San Antonio, GIDS Division @gsageoinfo.bsky.social is hosting a student poster competition (Session T42) with 10+ presenters.

🗓 Oct 20, 2025 | 3:30–5:30 pm
💰 Cash awards for winners

Sign up here: forms.gle/FEKfy6MrPLW6...

#GSA2025 #Geoinformatics #DataScience
Judge Sign-up Form for 2025 GSA Geoinformatics and Data Science Division Student Poster Competition
At the 2025 GSA Annual Meeting in San Antonio, TX, the GSA Geoinformatics and Data Science Division will host and sponsor the student poster competition session T42: A Showcase of Student Research in ...
forms.gle
September 11, 2025 at 6:39 PM
Reposted by GSA's MGPV Division
natgeosci.nature.com
⚒️ September editorial: Bennu up close and mineralogical - on the samples returned from asteroid Bennu

www.nature.com/articles/s41...
Bennu up close and mineralogical - Nature Geoscience
The mineralogy of samples returned from asteroid Bennu yield valuable insights into the physical and chemical processes — on both small and large scales — that shape small bodies in the Solar System.
www.nature.com
September 11, 2025 at 3:00 PM
Reposted by GSA's MGPV Division
sorosilicate.bsky.social
#Titanite from the Franciscan subduction complex, California, as seen under plane and cross polarized light in a petrographic microscope. Field of view about 2 mm. Photo by Sarah Brandt. #MinCup25
September 11, 2025 at 4:35 PM
Reposted by GSA's MGPV Division
silicatefondue.fosstodon.org.ap.brid.gy
Alex Strekeisen has some beautiful thin section images of titanite:

https://www.alexstrekeisen.it/english/pluto/titanite.php

#mincup25 #ThinSectionThursday #titanite #sphene #granite #mineralogy
Titanite crystal in a granite. cross-polarized image. 10x (Field of view = 2mm) from: https://www.alexstrekeisen.it/english/pluto/titanite.php
September 11, 2025 at 4:23 PM