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Fumarole mineral

Adapted from Wikipedia · Discoverer experience

A beautiful crystal specimen of belomarinaite, a rare mineral found near an active volcano in Russia.

Fumarole minerals are special kinds of minerals that form when gases and other materials come out of the ground near volcanoes. These minerals are created when the gases cool and turn into solid forms, a process called desublimate. This often happens during a volcanic eruption or when gases escape from openings in the Earth called fumaroles or volcanic vents.

Fumarole formation of tazieffite [de] acicular crystals (black) at Mutnovsky, Kamchatka. An electron micrograph, colour enhanced by optical microscopy, depicted width: 700 microns.

These minerals are most commonly found around volcanoes, where they are known as volcanic sublimate or fumarolic sublimate. They can also appear in places where coal is burning underground. Fumarole minerals come in many colors, including black and multicolored, but they often change when they are exposed to air.

One common fumarole mineral is native sulfur, also known as brimstone. Other types include different kinds of halides, sulfides, and sulfates. Scientists have found at least 240 different fumarole minerals at the Tolbachik volcano in Kamchatka, Russia. Other places where these minerals have been discovered include Vulcano in Italy and Bezymyanny volcano in Russia.

Origin and appearance

Fumarole minerals in SEM images, from Mutnovsky volcano in Kamchatka. An electron micrograph, colour enhanced by optical microscopy, depicted width: 700 microns.

Fumarole minerals form when gases from volcanoes cool and change into solid minerals. These minerals can create colorful deposits around volcanic vents. They often appear as crusts, plates, or small round shapes and can include compounds like sulfur, halides, oxides, sulfates, and sulfides. The exact types of minerals vary depending on the volcano, the temperature, and the history of the vent.

These minerals are not just found on Earth. They have also been discovered on Mars and possibly on the Moon. Because these minerals can change over time, many of them are rare and some disappear quickly. However, they help scientists understand past volcanic activity and heat flow in these areas.

Volcanoes

Electron micrograph images of fumarolic minerals at Mutnovsky volcano, Kamchatka

Research on minerals formed by volcanic gases has been done in many places, including Izalco in El Salvador, Eldfell in Iceland, Vesuvius in Italy, and Vulcano in Italy. These minerals form when gases from volcanoes cool and change into solid pieces.

The Tolbachik volcano in Kamchatka, Russia, is especially famous for its many different minerals. About 240 different minerals have been found there. These minerals include special combinations of elements like copper, zinc, and sulfur.

Minerals discovered in fumarole areas

Fumarole minerals are special kinds of minerals that form near volcanoes. They are created when gases and other materials burst out from volcanic vents during eruptions. As these gases cool down, they leave behind tiny mineral deposits. These minerals can also be found in places where coal is burning, showing how heat and gases can shape the earth around us.

MineralFormulaLocationDate described
AbramovitePb
2SnInBiS
7
Kudryavy, Russia2008
AllochalcoseliteCu+
Cu2+
5PbO
2(SeO
3)
2Cl
5
AluminocoquimbiteAlFe(SO
4)*
3H
2O
Grotta del' Alume, Vulcano, Italy2010
Aluminopyracmonite(NH
4)
3Al(SO
4)
3
La Fossa, Vulcano, Italy2018
ArsmiranditeNa
18Cu2+
12Fe3+
O
8(AsO
4)
8Cl
5
Arsenatnaya fumarole, Tolbachik, Russia2020
AxeliteNa
14Cu
7(AsO
4)
8F
2Cl
2
Arsenatnaya fumarole, Tolbachik, Russia2022
BaliczuniciteBi
2O(SO
4)
2
La Fossa, Vulcano, Italy2013
BelomarinaiteKNaSO
4
Toludskoe lava field, Tolbachik, Russia2019
BelousoviteKZn(SO
4)Cl
Yadovitaya fumarole, Second Scoria Cone, Tolbachik, Russia2018
Blossiteα‑Cu2+
2V5+
2O
7
Izalco, El Salvador1987
BubnovaiteK
2Na
8Ca(SO
4)
6
Naboko cone, Tolbachik, Russia
BurnsiteKCdCu
7O
2(SeO
3)
2Cl
9
Tolbachik2002?
CadmoinditeCdIn
2S
4
Kudryavy, Russia2004
CalciolangbeiniteK
2Ca
2(SO
4)
3
Arsenatnaya fumarole, Tolbachik, Russia2022
Campostriniite(Bi3+
,Na)
3(NH,
4K)
2Na
2(SO
4)·
6H
2O
La Fossa, Vulcano, Italy2015
CannizzaritePb
46Bi
54(S
,Se)
127
La Fossa, Vulcano, Italy
CesiodymiteCsKCu
5O(SO
4)
5
Second Scoria Cone, Tolbachik, Russia2018
ChubaroviteKZn
2(BO
3)Cl
2
Arsenatnaya fumarole, Tolbachik, Russia2015
CryptochalciteK
2Cu
5O(SO
4)
5
Second Scoria Cone, Tolbachik, Russia2018
CuprodobrovolskyiteNa
4Cu(SO
4)
3
Second Scoria Cone, Tolbachik2023
CupromolybditeCu
3O(MoO
4)
2
New Tolbachik scoria cones, Tolbachik, Russia2012
D'ansiteNa
21Mn2+
(SO
4)
10Cl
Vesuvius and Vulcano, Italy2012
DemartiniteK
2SiF
6
La Fossa, Vulcano, Italy2007
DemicheleiteBiSI and BiSBrLa Fossa, Vulcano, Italy2010 and 2008
DobrovolskyiteNa
4Ca(SO
4)
3
Great Tolbachik fissure eruption, Kamchatka peninsula, Russia2021
ElasmochloiteNa
3Cu
6BiO
4(SO
4)
EldfelliteNaFe(SO
4)
2
Ermakovite(NH
4)(As
2O
3)
2Br
Fan-Yagnob coal deposit, Tajikistan2022
GrigorieviteCu
3Fe3+
2Al
2(VO
4)
Second Scoria Cone, Tolbachik, Russia2015
HeimaeyiteNa
3Al(SO
4)
3
Eldfell, Iceland2025
HermannjahniteCuZn(SO
4)
2
Naboko scoria cone, Tolbachik, Russia2018
KantoriteK
2NaMg(SO
4)
2F
Arsenatnaya fumarole, Tolbachik, Russia2025
KarpoviteTl
2VO(SO
4)
2(H
2O)
First Cinder Cone, Tolbachik, Russia2018
KnasibfiteK
3Na
4[SiF
6]
3[BF
4]
La Fossa, Vulcano, Italy2008
KoksharoviteCaMg
2Fe3+
4(VO
4)
6
Bezymyanny, Russia2015
KristjániteKNa
2H(SO
4)
2
Fimmvörðuháls, Iceland2010
Kudriavite(Cd
,Pb)Bi
2S
4
Kudryavy, Russia2004
LehmanniteNa
18Cu2+
12TiO
8(AsO
4)
8FCl
5
Arsenatnaya fumarole, Tolbachik2020
LeonardseniteMgAlF
5(H
2O)
2
Eldfell, Heimaey, Iceland2015
LesyukiteAl
2(OH)
5Cl20−
*H
2O
First Cone, Tolbachik, Russia2007 or earlier
Lucabindiite(K
,NH
4)As
4O
6(Cl
,Br)
La Fossa, Vulcano, Italy2010–2011
MajzlaniteK
2Na(ZnNa)Ca(SO
4)
4
Yadovitaya fumarole, Tolbachik, Russia2019
ManuelarossiiteCaPbAlF
7
Vesuvius volcano, Italy2024?
MedvedeviteKMnV
2O
6Cl
*(H
2O)
2
Toludskoe lava field, Tolbachik, Russia2020
NapoliitePb
2OFCl
Vesuvius, 1994 rocks2010-2020
NatromolybditeNa
2MoO·
4H
2O
Arsenatnaya fumarole, Tolbachik, Russia2025
NishanbaeviteKAl
2O(AsO
4)(SO
4)
Arsenatnaya fumarole, Tolbachik, Russia2022
OskarssoniteAlF
3
Eldfell, Iceland2018
OzerovaiteNa
2KAl
3(AsO
4)
4
Second Cinder Cone, Tolbachik, Russia2019
ParadimorphiteAs
4S
3
Solfatara, Campi Flegrei, Italy2022
Parageorgbokiiteb-
Cu
5O
2(SeO
3)
2Cl
2
Yadovitaya fumarole, Tolbachik, Russia2007
ParascandolaiteKMgF
3
Vesuvius, Italy2014
ParawulffiteK
5Na
3Cu
8O
4(SO
4)
8
Arsenatnaya fumarole, Tolbachik, Russia2014
PetroviteNa
10CaCu
2(SO
4)
8
Second Scoria Cone, Tolbachik, Russia2020
PliniusiteCa
5(VO
4)
3F
Tolbachik, Russia2022
PrewittiteKPb
1.5Cu
6Zn(SeO
3)
2O
2Cl
10
Second Scoria Cone, Tolbachik, Russia2013
PseudolyonsiteCu
3(VO
4)
2
New Tolbachik scoria cones, Tolbachik, Russia2011
PuniniteNa
2Cu
3O(SO
4)
3
Second scoria cone, Tolbachik, Russia2017
RhabdoboriteMg
12(V
,Mo
,W)
4/3O
6[(BO
3)
6–x(PO
4)
xF
2–x]
Arsenatnaya fumarole, Tolbachik, Russia2020
RussoiteNH
4ClAs3+
2O
3(H
2O)
0.5
Solfatara, Phlegrean Fields, Italy2018
RyabchikoviteCuMg(Si
2O
6)
Arsenatnaya, Tolbachik2023
SbacchiiteCa
2AlF
7
Vesuvius, Italy2019
ShcherbinaiteV
2O
5
Izalco, El Salvador1983
StoiberiteCu
5V
2O
10
"Y fumarole", Izalco, El Salvador1979
Therasiaite(NH
4)
3KNa
2Fe2+
Fe3+
(SO
4)
3Cl
5
La Fossa, Vulcano, Italy2014
Thermessaite(NH
4)
2AlF
3(SO
4)
La Fossa, Vulcano, Italy2021
TopsøeiteFeF
3(H
2O)
3
Hekla, Iceland2018
WulffiteK
3NaCu
4O
2(SO
4)
4
Arsenatnaya fumarole, Tolbachik, Russia2014
VasilseverginiteCu
9O
4(AsO
4)
2(SO
4)
2
Arsenatnaya fumarole, Tolbachik, Russia2021
WrightiteK
2Al
2O(AsO
4)
2
Second Scoria Cone, Tolbachik, Russia1983
YavapaiiteKFe(SO
4)
2
ZiminaiteFe3+
VO
4
Bezymyanny, Russia2018
ZincobradaczekiteNaCuCuZn
2(AsO
4)
3
Yadovitaya fumarole, Tolbachik, Russia2020

Images

A detailed view of colorful mineral crystals formed near a volcano, showing different shapes and colors of natural substances.
A colorful close-up of tiny mineral crystals, including forms of salt and other natural substances, captured through a powerful microscope.
A colorful close-up of tiny minerals formed around a volcano, showing interesting crystal shapes and natural patterns found in nature.

Related articles

This article is a child-friendly adaptation of the Wikipedia article on Fumarole mineral, available under CC BY-SA 4.0.

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