Phosphorite deposit.

The basal Delwara Formation orthoquartzites overlie the Mewar Gneiss Complex (MGC). Sitting on these orthoquartzites, the Jhamarkotra Formation dolostones, containing a stromatolitic phosphorite, are overlain by a phyllite and greywacke succession. The Jhamarkotra phosphorite mining area is divided into blocks A to H, forming a syncline, and was affected by faulting, especially in blocks F and G. Samples were collected in the field, where stromatolitic phosphates are exposed. Generally, the stromatolitic phosphate columns are dark-gray, while the intercolumnar dolostones are light-gray. Hydrothermal alteration zones are also present, with veins and fractures observed in dolostone and phosphate layers. Sulfide veins have been observed in association with faults. In the F-block, botryoidal phosphates are developed. Blocks E and F are rich in altered phosphorites with completely obliterated stromatolitic columns, yielding the highest-grade phosphate ore.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

14 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃(Cl/F/OH)

References:

Kumar, Rajeev; Sreenivas, Bulusu; Kumar, Teeda Vijaya; Dixit, Shikha; Balu, Gugulothu; Bekker, Andrey (2026) Phosphorite Ore Enrichment Due to Secondary Alteration in the Jhamarkotra Stromatolitic Phosphorites, Aravalli Supergroup, Northwestern India. Minerals, 16 (1). doi:10.3390/min16010097

ⓘ Arsenopyrite

Formula: FeAsS

References:

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

References:

ⓘ Calcite

Formula: CaCO₃

References:

Banerjee, D. M., Basu, P. C., and Srivastava, N., 1980, Petrology, Mineralogy, Geochemistry, and Origin of the Precambrian Aravallian Phosphorite Deposits of Udaipur and Jhabua, India, Economic Geology 75: 1181-1199.

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

ⓘ Dolomite

Formula: CaMg(CO₃)₂

References:

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

ⓘ Fluorapatite var. Carbonate-rich Fluorapatite

Formula: Ca₅(PO₄,CO₃)₃(F,O)

References:

ⓘ Galena

Formula: PbS

References:

ⓘ Goethite

Formula: Fe³⁺O(OH)

References:

ⓘ Hematite

Formula: Fe₂O₃

References:

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

ⓘ 'Micrite'

References:

ⓘ Native Copper

Formula: Cu

References:

ⓘ Pyrite

Formula: FeS₂

References:

ⓘ Quartz

Formula: SiO₂

References:

ⓘ Rutile

Formula: TiO₂

References:

ⓘ Siderite

Formula: FeCO₃

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Copper	1.AA.05	Cu
Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Galena	2.CD.10	PbS
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Arsenopyrite	2.EB.20	FeAsS
Group 4 - Oxides and Hydroxides
ⓘ	Goethite	4.00.	Fe³⁺O(OH)
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Rutile	4.DB.05	TiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Siderite	5.AB.05	FeCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite var. Carbonate-rich Fluorapatite	8.BN.05	Ca₅(PO₄,CO₃)₃(F,O)
ⓘ		8.BN.05	Ca₅(PO₄)₃F
Unclassified
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Apatite'	-	Ca₅(PO₄)₃(Cl/F/OH)
ⓘ	'Micrite'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Goethite	Fe³⁺O(OH)
H	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
C	ⓘ Dolomite	CaMg(CO₃)₂
C	ⓘ Siderite	FeCO₃
O	Oxygen
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Calcite	CaCO₃
O	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Goethite	Fe³⁺O(OH)
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Quartz	SiO₂
O	ⓘ Rutile	TiO₂
O	ⓘ Siderite	FeCO₃
O	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
F	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
F	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Al	Aluminium
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	Silicon
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Quartz	SiO₂
P	Phosphorus
P	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
P	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
S	Sulfur
S	ⓘ Arsenopyrite	FeAsS
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Galena	PbS
S	ⓘ Pyrite	FeS₂
Cl	Chlorine
Cl	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Ti	ⓘ Rutile	TiO₂
Fe	Iron
Fe	ⓘ Arsenopyrite	FeAsS
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Goethite	Fe³⁺O(OH)
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Siderite	FeCO₃
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Native Copper	Cu
As	Arsenic
As	ⓘ Arsenopyrite	FeAsS
Pb	Lead
Pb	ⓘ Galena	PbS

Other Regions, Features and Areas containing this locality

AsiaContinent

Indian PlateTectonic Plate

Aravalli Fold BeltVolcanic Arc

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References

[1]Kumar, Rajeev; Sreenivas, Bulusu; Kumar, Teeda Vijaya; Dixit, Shikha; Balu, Gugulothu; Bekker, Andrey (2026) Phosphorite Ore Enrichment Due to Secondary Alteration in the Jhamarkotra Stromatolitic Phosphorites, Aravalli Supergroup, Northwestern India. Minerals, 16 (1). doi:10.3390/min16010097

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