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Rocky Beach, Port Macquarie, Macquarie Co., New South Wales, Australia

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Latitude & Longitude (WGS84): 31° 26' 17'' South , 152° 55' 31'' East
Latitude & Longitude (decimal): -31.43830,152.92544
GeoHash:G#: r6ktpuuft
Locality type:Beach
Age:541 ± 1.0 to 485.4 ± 1.9 Ma
Geologic Time:Cambrian
Reference for age:Och, D.J., Leitch, E.C., Caprarelli, G. (2007) Geological units of the Port Macquarie–Tacking Point tract, north-eastern Port Macquarie Block, Mid North Coast region of New South Wales. Quarterly Notes, Geological Survey of New South Wales, No. 126.
Köppen climate type:Cfa : Humid subtropical climate


The Rocky Beach Metamorphic Melange is located at Rocky Beach, Port Macquarie on the mid north coast of New South Wales, approximately 400 km north of Sydney.

The rock group forms part of the Port Macquarie block (Och et al. 2003), located in the eastern New England Fold Belt and is notable for the presence of well-exposed high-pressure metamorphic rocks and a wide variety of igneous rocks, including pillow basalts of MORB (Mid Ocean Ridge Basalt) affinity, and minor mafic and intermediate calc- alkaline intrusions, embedded in lenses of serpentinite melange. It covers an area of just under 1 hectare.


Near the north end of Rocky Beach a 'melange-in-melange' structure preserving serpentinite masses that have invaded the Watonga Formation, which has also enveloped two bodies of chlorite- actinolite schist, surrounded by highly schistose Port Macquarie Serpentinite, contain inclusions of lawsonite eclogite, omphacitite, blueschist, and tremolite marble. Although these exotic high-pressure metamorphic rocks are known from serpentinite bodies elsewhere across eastern Australia their occurrence is unique because some of these tectonic blocks, namely eclogite, contain a mineral called lawsonite, which have only been identified in 10 localities worldwide. The Rocky Beach Metamorphic Melange type area occurs at the north end of Rocky Beach. The unit comprises blocks of multiply deformed polymetamorphosed high-pressure metamorphic rocks (Och et al. 2003) of mafic igneous parentage low-grade blocks of sedimentary and basaltic rocks derived from the Watonga Formation, and a narrow slice of antigorite serpentinite, set in a multiply deformed chlorite- actinolite schist matrix.

The location is an internationally important geoheritage site.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


13 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Albite
Formula: Na(AlSi3O8)
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Antigorite
Formula: Mg3(Si2O5)(OH)4
Reference: Och, D.J., Leitch, E.C., Caprarelli, G. (2007) Geological units of the Port Macquarie–Tacking Point tract, north-eastern Port Macquarie Block, Mid North Coast region of New South Wales. Quarterly Notes, Geological Survey of New South Wales, No. 126.
'Apatite'
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
'Blueschist'
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Calcite
Formula: CaCO3
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
'Chlorite Group'
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
'Eclogite'
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Glaucophane
Formula: ◻[Na2][Mg3Al2]Si8O22(OH)2
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
'K Feldspar'
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Lawsonite
Formula: CaAl2(Si2O7)(OH)2 · H2O
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Omphacite
Formula: (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
'Phengite'
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Pyrope
Formula: Mg3Al2(SiO4)3
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Quartz
Formula: SiO2
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
'Schist'
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
'Serpentinite'
Reference: Och, D.J., Leitch, E.C., Caprarelli, G. (2007) Geological units of the Port Macquarie–Tacking Point tract, north-eastern Port Macquarie Block, Mid North Coast region of New South Wales. Quarterly Notes, Geological Survey of New South Wales, No. 126.
Talc
Formula: Mg3Si4O10(OH)2
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.
Titanite
Formula: CaTi(SiO4)O
Reference: Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
'Actinolite'9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Albite'9.FA.35Na(AlSi3O8)
'Almandine'9.AD.25Fe2+3Al2(SiO4)3
'Antigorite'9.ED.15Mg3(Si2O5)(OH)4
'Glaucophane'9.DE.25◻[Na2][Mg3Al2]Si8O22(OH)2
'Lawsonite'9.BE.05CaAl2(Si2O7)(OH)2 · H2O
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
'Omphacite'9.DA.20(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
'Pyrope'9.AD.25Mg3Al2(SiO4)3
'Talc'9.EC.05Mg3Si4O10(OH)2
'Titanite'9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Blueschist'-
'Chlorite Group'-
'Eclogite'-
'K Feldspar'-
'Phengite'-KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
'Schist'-
'Serpentinite'-

List of minerals arranged by Dana 8th Edition classification

Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Pyrope51.4.3a.1Mg3Al2(SiO4)3
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Lawsonite56.2.3.1CaAl2(Si2O7)(OH)2 · H2O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Omphacite65.1.3b.1(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Glaucophane66.1.3c.1◻[Na2][Mg3Al2]Si8O22(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Antigorite71.1.2a.1Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
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, Rocks, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Apatite'-
'Blueschist'-
'Chlorite Group'-
'Eclogite'-
'K Feldspar'-
'Phengite'-KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
'Schist'-
'Serpentinite'-

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H AntigoriteMg3(Si2O5)(OH)4
H Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
H LawsoniteCaAl2(Si2O7)(OH)2 · H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
H TalcMg3Si4O10(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O AlbiteNa(AlSi3O8)
O AlmandineFe32+Al2(SiO4)3
O AntigoriteMg3(Si2O5)(OH)4
O CalciteCaCO3
O Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
O LawsoniteCaAl2(Si2O7)(OH)2 · H2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
O PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
O PyropeMg3Al2(SiO4)3
O QuartzSiO2
O TalcMg3Si4O10(OH)2
O TitaniteCaTi(SiO4)O
NaSodium
Na AlbiteNa(AlSi3O8)
Na Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Na Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg AntigoriteMg3(Si2O5)(OH)4
Mg Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Mg Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Mg PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Mg PyropeMg3Al2(SiO4)3
Mg TalcMg3Si4O10(OH)2
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AlmandineFe32+Al2(SiO4)3
Al Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Al LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Al PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Al PyropeMg3Al2(SiO4)3
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si AlbiteNa(AlSi3O8)
Si AlmandineFe32+Al2(SiO4)3
Si AntigoriteMg3(Si2O5)(OH)4
Si Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Si LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Si PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Si PyropeMg3Al2(SiO4)3
Si QuartzSiO2
Si TalcMg3Si4O10(OH)2
Si TitaniteCaTi(SiO4)O
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca CalciteCaCO3
Ca LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Ca Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Ca TitaniteCaTi(SiO4)O
TiTitanium
Ti TitaniteCaTi(SiO4)O
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe AlmandineFe32+Al2(SiO4)3
Fe Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Fe PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2

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

Permian - Cambrian
251.902 - 541 Ma



ID: 768963
melange 75701

Age: Phanerozoic (251.902 - 541 Ma)

Description: Melange of the Port Macquarie Complex; dolerite, gabbro, diorite, basalt, chert, jasper, toanlite, trondhjemite, quartz feldspar porphyry.

Comments: igneous mafic intrusive; igneous mafic volcanic; synthesis of multiple published descriptions

Lithology: Igneous mafic intrusive; igneous mafic volcanic

Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia). [5]

Early Permian
272.95 - 298.9 Ma



ID: 3186666
Paleozoic sedimentary rocks

Age: Cisuralian (272.95 - 298.9 Ma)

Comments: New England Fold Belt

Lithology: Limestone,mudstone,tillite,siltstone,sandstone

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)
Och, D.J., Leitch, E.C., Caprarelli, G., Watanabe, T. (2003) Blueschist and eclogite in tectonic melange, Port Macquarie, New South Wales, Australia. Mineralogical Magazine, 67:4, 609-624. [https://doi.org/10.1180/0026461036740121]
Och, D.J. (2007) Eclogite, serpentinite, melange and mafic intrusive rocks: manifestation of long-lived Palaeozoic convergent margin activity, Port Macquarie, eastern Australia. PhD Thesis, University of Technology, Sydney.
Och, D.J., Leitch, E.C., Graham, I.T., Caprarelli, G. (Eds.) (2005) The geology of the Port Macquarie-Tacking Point coastal tract. SGGMP-Port Macquarie 2005, First biennial conference, 76. Specialist Group in Geochemistry, Mineralogy and Petrology, Geological Society of Australia, Port Macquarie, pp 95-99.
Och, D.J., Leitch, E.C., Caprarelli, G. (2007) Geological units of the Port Macquarie–Tacking Point tract, north-eastern Port Macquarie Block, Mid North Coast region of New South Wales. Quarterly Notes, Geological Survey of New South Wales, No. 126.

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