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Blue Mountains, Portland Parish, Jamaicai
Regional Level Types
Blue MountainsMountain
Portland ParishParish
JamaicaCountry

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Latitude & Longitude (WGS84): 18° 3' 4'' North , 76° 33' 40'' West
Latitude & Longitude (decimal): 18.05132,-76.56128
GeoHash:G#: d71w9y1u8
Locality type:Mountain
Köppen climate type:Aw : Tropical savanna, wet
Nearest Settlements:
PlacePopulationDistance
Trinity Ville2,895 (2018)11.2km
Mavis Bank1,821 (2017)11.3km
Easington2,634 (2018)14.4km
Moore Town1,119 (2017)14.6km
Hope Bay1,666 (2018)16.4km


Blue Mts. of east Jamaica.
Early Cretaceous accretion prism/subduction complex of island-arc system.
Tholeiitic HP-LT (2.6-3.5 kb, 235-240 °C) blueschists (meta-basalts, gabbros and peridotites, metaepiclastites, meta cherts, marbles, etc.), low-grade greenschists and calcalkaline hornblende-biotite-plagioclase amphibolites (mafic to quartzofeldspathic schists / Westphalia schists).
Original listed as Mt. Hibernia, however this only refers to a geologic description of schists in the region rather than a mountain.

Regions containing this locality

Caribbean PlateTectonic Plate
The CaribbeanRegion

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite
Formula: Na(AlSi3O8)
'Chlorite Group'
Chloritoid
Formula: (Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
'Clinopyroxene Subgroup'
'Crossite'
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Glaucophane
Formula: ⃞[Na2][Mg3Al2]Si8O22(OH)2
Gold
Formula: Au
'Pumpellyite'
Quartz
Formula: SiO2
Riebeckite
Formula: ⃞[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Stilpnomelane
Formula: (K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
Chloritoid9.AF.85(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Glaucophane9.DE.25⃞[Na2][Mg3Al2]Si8O22(OH)2
Riebeckite9.DE.25⃞[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Stilpnomelane9.EG.40(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Clinopyroxene Subgroup'-
'Crossite'-
'Pumpellyite'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Chloritoid52.3.3.1(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Glaucophane66.1.3c.1⃞[Na2][Mg3Al2]Si8O22(OH)2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined islands
Stilpnomelane74.1.1.1(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Chlorite Group'-
'Clinopyroxene Subgroup'-
'Crossite'-
'Pumpellyite'-
Riebeckite-⃞[Na2][Fe2+3Fe3+2]Si8O22(OH)2

List of minerals for each chemical element

HHydrogen
H Glaucophane⃞[Na2][Mg3Al2]Si8O22(OH)2
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
H Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
OOxygen
O Glaucophane⃞[Na2][Mg3Al2]Si8O22(OH)2
O AlbiteNa(AlSi3O8)
O QuartzSiO2
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
O Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
NaSodium
Na Glaucophane⃞[Na2][Mg3Al2]Si8O22(OH)2
Na AlbiteNa(AlSi3O8)
Na Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Na Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
MgMagnesium
Mg Glaucophane⃞[Na2][Mg3Al2]Si8O22(OH)2
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
AlAluminium
Al Glaucophane⃞[Na2][Mg3Al2]Si8O22(OH)2
Al AlbiteNa(AlSi3O8)
Al Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
SiSilicon
Si Glaucophane⃞[Na2][Mg3Al2]Si8O22(OH)2
Si AlbiteNa(AlSi3O8)
Si QuartzSiO2
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Si Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
KPotassium
K Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Fe Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
AuGold
Au GoldAu

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleogene - Cretaceous
23.03 - 145 Ma



ID: 3189104
Mesozoic-Cenozoic sedimentary rocks

Age: Phanerozoic (23.03 - 145 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Draper, G. (1986) Blueschists and associated rocks in eastern Jamaica and their significance for Cretaceous plate-margin development in the northern Caribbean. Geological Society of America Bulletin 97:1, 48-60.
Garrett, R.G., Lalor, G.C., Vutchkov, M. (2004) Geochemical exploration for gold in Jamaica: a comparison of stream sediment and soil surveys. Geochemistry: Exploration, Environment, Analysis, 4:2, 161-170.
Abbott, R.N., Bandy, B.R., Jackson, T.A., Scott, P.W. (2003) Blueschist-Greenschist Transition in the Mt. Hibernia Schist, Union Hill, Parish of St. Thomas, Jamaica. International Geology Review, 45, 1-15.
Abbott, R.N., Bandy, B.R. (2008) Amphibolite and blueschist–greenschist facies metamorphism, Blue Mountain inlier, eastern Jamaica. Geological Journal 43:5, 525-541.

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