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D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzaniai
Regional Level Types
D-Block MineMine
Merelani HillsGroup of Hills
Lelatema MountainsMountain Range
Simanjiro DistrictDistrict
Manyara RegionRegion
TanzaniaCountry

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Latitude & Longitude (WGS84):
3° South , 37° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
GRN:
S03E26
Type:
Mine
KΓΆppen climate type:
Aw : Tropical savanna, wet
Mindat Locality ID:
189433
Long-form identifier:
mindat:1:2:189433:5
GUID (UUID V4):
08aeb2eb-363b-4819-928b-e9ff5de464db


A gem (Tanzanite) mine.

Production is from small groups of miners (350 pits). Subdivided into 3 areas; D-1 (1.81km2), D-2 (0.04 km2), D-3 (0.003km2). There are also 4 extension blocks of area D.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


21 valid minerals.

Detailed Mineral List:

β“˜ Alabandite
Formula: MnS
β“˜ Allanite-(Ce)
Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
β“˜ 'Apophyllite Group'
Formula: AB4[Si8O22]X · 8H2O
β“˜ Axinite-(Mg)
Formula: Ca2MgAl2BSi4O15OH
References:
Photo ID: 379162
β“˜ Axinite-(Mn)
Formula: Ca2Mn2+Al2BSi4O15(OH)
References:
Tony Nikischer
β“˜ Calcite
Formula: CaCO3
β“˜ 'Chabazite'
Habit: pseudocubic
β“˜ Diopside
Formula: CaMgSi2O6
Colour: colorless, green
Fluorescence: blue
β“˜ Diopside var. Chromium-bearing Diopside
Formula: Ca(Mg,Cr)Si2O6
βœͺ Fluorapatite
Formula: Ca5(PO4)3F
Colour: blue
Description: see especially Rocks and Minerals 88(2), 179-183 (2013).
β“˜ Fluorite
Formula: CaF2
Habit: cubeoctahedral
Colour: colorless, purple
βœͺ Graphite
Formula: C
Habit: tabular hexagonal with dominant pinacoids but notable lustrous prisms also noted.
Colour: silvery gray
Description: very common at the locality but some of world's best crystals were discovered in a pocket with diopside and fluorapatite in late 2007. See Rocks and Minerals 88(2) (2014).
β“˜ Grossular
Formula: Ca3Al2(SiO4)3
Colour: green
β“˜ Grossular var. Tsavorite
Formula: Ca3Al2(SiO4)3
β“˜ 'Heulandite Subgroup'
Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
β“˜ Kyanite
Formula: Al2(SiO4)O
β“˜ Molybdenite
Formula: MoS2
Habit: Wire
β“˜ Prehnite
Formula: Ca2Al2Si3O10(OH)2
Habit: tabular, blocky, rosette
β“˜ Pyrite
Formula: FeS2
Description: Often seen as inclusions in chabazite as well as on the surface of any other mineral in an assemblage since it is late stage.
β“˜ Rhodochrosite
Formula: MnCO3
Colour: brown
β“˜ Sphalerite
Formula: ZnS
Colour: orange, red
β“˜ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
Habit: tabular
Colour: colorless
β“˜ Titanite
Formula: CaTi(SiO4)O
Colour: honey, brown
β“˜ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
β“˜ Tremolite var. Chrome-Tremolite
Formula: ◻{Ca2}{Mg5}(Si8O22)(OH)2
βœͺ Wurtzite
Formula: (Zn,Fe)S
Habit: hexagonal
Colour: orange brown
Description: The partly translucent to transparent wurtzite crystals from Merelani are generally 2–3 cm in size
β“˜ Zircon
Formula: Zr(SiO4)
Description: Only seen and analyzed via SEM-EDS.
βœͺ Zoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Habit: elongated prisms
Colour: blue, purple, pink, yellow, green or multi-colored
βœͺ Zoisite var. Tanzanite
Habit: elongated prisms
Colour: blue, purple, pink, yellow, green or multi-colored

Gallery:

AB4[Si8O22]X · 8H2Oβ“˜ 'Apophyllite Group'
Ca2MgAl2BSi4O15OHβ“˜ Axinite-(Mg)
CaCO3β“˜ Calcite
β“˜ 'Chabazite'
CaMgSi2O6β“˜ Diopside
Ca(Mg,Cr)Si2O6β“˜ Diopside var. Chromium-bearing Diopside
Ca5(PO4)3Fβ“˜ Fluorapatite
CaF2β“˜ Fluorite
Cβ“˜ Graphite
Ca3Al2(SiO4)3β“˜ Grossular var. Tsavorite
Al2(SiO4)Oβ“˜ Kyanite
Ca2Al2Si3O10(OH)2β“˜ Prehnite
ZnSβ“˜ Sphalerite
M6-7[Al8-9Si27-28O72] · nH2Oβ“˜ 'Stilbite Subgroup'
CaTi(SiO4)Oβ“˜ Titanite
◻Ca2Mg5(Si8O22)(OH)2β“˜ Tremolite
◻{Ca2}{Mg5}(Si8O22)(OH)2β“˜ Tremolite var. Chrome-Tremolite
Zr(SiO4)β“˜ Zircon
(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)β“˜ Zoisite
β“˜ Zoisite var. Tanzanite

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
β“˜Sphalerite2.CB.05aZnS
β“˜Wurtzite2.CB.45(Zn,Fe)S
β“˜Alabandite2.CD.10MnS
β“˜Molybdenite2.EA.30MoS2
β“˜Pyrite2.EB.05aFeS2
Group 3 - Halides
β“˜Fluorite3.AB.25CaF2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Rhodochrosite5.AB.05MnCO3
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
β“˜Grossular
var. Tsavorite		9.AD.25Ca3Al2(SiO4)3
β“˜9.AD.25Ca3Al2(SiO4)3
β“˜Zircon9.AD.30Zr(SiO4)
β“˜Kyanite9.AF.15Al2(SiO4)O
β“˜Titanite9.AG.15CaTi(SiO4)O
β“˜Axinite-(Mn)9.BD.20Ca2Mn2+Al2BSi4O15(OH)
β“˜Axinite-(Mg)9.BD.20Ca2MgAl2BSi4O15OH
β“˜Allanite-(Ce)9.BG.05b(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
β“˜Zoisite
var. Tanzanite		9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
β“˜9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
β“˜Diopside9.DA.15CaMgSi2O6
β“˜var. Chromium-bearing Diopside9.DA.15Ca(Mg,Cr)Si2O6
β“˜Tremolite9.DE.10β—»Ca2Mg5(Si8O22)(OH)2
β“˜var. Chrome-Tremolite9.DE.10β—»{Ca2}{Mg5}(Si8O22)(OH)2
β“˜Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Unclassified
β“˜'Heulandite Subgroup'-(Na/Ca/K)5-6[Al8-9 Si27-28 O72] Β· nH2O
β“˜'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] Β· nH2O
β“˜'Chabazite'-
β“˜'Apophyllite Group'-AB4[Si8O22]X Β· 8H2O

List of minerals for each chemical element

HHydrogen
Hβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Hβ“˜ Apophyllite GroupAB4[Si8O22]X · 8H2O
Hβ“˜ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Hβ“˜ Axinite-(Mg)Ca2MgAl2BSi4O15OH
Hβ“˜ Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)
Hβ“˜ PrehniteCa2Al2Si3O10(OH)2
Hβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Hβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hβ“˜ Tremolite var. Chrome-Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
BBoron
Bβ“˜ Axinite-(Mg)Ca2MgAl2BSi4O15OH
Bβ“˜ Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)
CCarbon
Cβ“˜ CalciteCaCO3
Cβ“˜ GraphiteC
Cβ“˜ RhodochrositeMnCO3
OOxygen
Oβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Oβ“˜ Apophyllite GroupAB4[Si8O22]X · 8H2O
Oβ“˜ CalciteCaCO3
Oβ“˜ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
Oβ“˜ DiopsideCaMgSi2O6
Oβ“˜ FluorapatiteCa5(PO4)3F
Oβ“˜ GrossularCa3Al2(SiO4)3
Oβ“˜ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Oβ“˜ KyaniteAl2(SiO4)O
Oβ“˜ Axinite-(Mg)Ca2MgAl2BSi4O15OH
Oβ“˜ Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)
Oβ“˜ PrehniteCa2Al2Si3O10(OH)2
Oβ“˜ RhodochrositeMnCO3
Oβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oβ“˜ TitaniteCaTi(SiO4)O
Oβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oβ“˜ ZirconZr(SiO4)
Oβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oβ“˜ Grossular var. TsavoriteCa3Al2(SiO4)3
Oβ“˜ Tremolite var. Chrome-Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
FFluorine
Fβ“˜ FluorapatiteCa5(PO4)3F
Fβ“˜ FluoriteCaF2
NaSodium
Naβ“˜ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
MgMagnesium
Mgβ“˜ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
Mgβ“˜ DiopsideCaMgSi2O6
Mgβ“˜ Axinite-(Mg)Ca2MgAl2BSi4O15OH
Mgβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mgβ“˜ Tremolite var. Chrome-Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Alβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Alβ“˜ GrossularCa3Al2(SiO4)3
Alβ“˜ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Alβ“˜ KyaniteAl2(SiO4)O
Alβ“˜ Axinite-(Mg)Ca2MgAl2BSi4O15OH
Alβ“˜ Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)
Alβ“˜ PrehniteCa2Al2Si3O10(OH)2
Alβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Alβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alβ“˜ Grossular var. TsavoriteCa3Al2(SiO4)3
SiSilicon
Siβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Siβ“˜ Apophyllite GroupAB4[Si8O22]X · 8H2O
Siβ“˜ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
Siβ“˜ DiopsideCaMgSi2O6
Siβ“˜ GrossularCa3Al2(SiO4)3
Siβ“˜ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Siβ“˜ KyaniteAl2(SiO4)O
Siβ“˜ Axinite-(Mg)Ca2MgAl2BSi4O15OH
Siβ“˜ Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)
Siβ“˜ PrehniteCa2Al2Si3O10(OH)2
Siβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siβ“˜ TitaniteCaTi(SiO4)O
Siβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siβ“˜ ZirconZr(SiO4)
Siβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siβ“˜ Grossular var. TsavoriteCa3Al2(SiO4)3
Siβ“˜ Tremolite var. Chrome-Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
PPhosphorus
Pβ“˜ FluorapatiteCa5(PO4)3F
SSulfur
Sβ“˜ AlabanditeMnS
Sβ“˜ MolybdeniteMoS2
Sβ“˜ PyriteFeS2
Sβ“˜ SphaleriteZnS
Sβ“˜ Wurtzite(Zn,Fe)S
KPotassium
Kβ“˜ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
CaCalcium
Caβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Caβ“˜ CalciteCaCO3
Caβ“˜ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
Caβ“˜ DiopsideCaMgSi2O6
Caβ“˜ FluorapatiteCa5(PO4)3F
Caβ“˜ FluoriteCaF2
Caβ“˜ GrossularCa3Al2(SiO4)3
Caβ“˜ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Caβ“˜ Axinite-(Mg)Ca2MgAl2BSi4O15OH
Caβ“˜ Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)
Caβ“˜ PrehniteCa2Al2Si3O10(OH)2
Caβ“˜ TitaniteCaTi(SiO4)O
Caβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caβ“˜ Grossular var. TsavoriteCa3Al2(SiO4)3
Caβ“˜ Tremolite var. Chrome-Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
TiTitanium
Tiβ“˜ TitaniteCaTi(SiO4)O
CrChromium
Crβ“˜ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
MnManganese
Mnβ“˜ AlabanditeMnS
Mnβ“˜ Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)
Mnβ“˜ RhodochrositeMnCO3
FeIron
Feβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Feβ“˜ PyriteFeS2
Feβ“˜ Wurtzite(Zn,Fe)S
ZnZinc
Znβ“˜ SphaleriteZnS
Znβ“˜ Wurtzite(Zn,Fe)S
ZrZirconium
Zrβ“˜ ZirconZr(SiO4)
MoMolybdenum
Moβ“˜ MolybdeniteMoS2
CeCerium
Ceβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)

Other Regions, Features and Areas containing this locality

Africa
Somali PlateTectonic Plate

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