Cass Peak is often cited as Cass's Peak in the literature (see Speight,R.)

Soda amphibole arfvedsonite in a massive dyke along the Cass Peak ridgeline. This is a general rock unit rather than a specimen location.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Albite
var. Anorthoclase ?

ⓘ 'Amphibole Supergroup'

3 valid minerals.

Rock Types Recorded

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

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Rhyolite

ⓘ Trachyte

Detailed Mineral List:

ⓘ Albite var. Anorthoclase ?

Formula: (Na,K)AlSi₃O₈

References:

Speight, R. (1907) On a Soda Amphibole Trachyte from Cass's Peak, Banks Peninsula. Transactions of the New Zealand Institute, 40: Art. XIV, 176-184.

ⓘ 'Amphibole Supergroup'

Formula: AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

References:

Speight, R. (1907) On a Soda Amphibole Trachyte from Cass's Peak, Banks Peninsula. Transactions of the New Zealand Institute, 40: Art. XIV, 176-184.

ⓘ Arfvedsonite

Formula: [Na][Na₂][Fe²⁺₄Fe³⁺]Si₈O₂₂(OH)₂

References:

Railton, G. T., Watters, W. A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104. New Zealand Geological Survey

ⓘ 'Feldspar Group'

References:

Speight, R. (1907) On a Soda Amphibole Trachyte from Cass's Peak, Banks Peninsula. Transactions of the New Zealand Institute, 40: Art. XIV, 176-184.

ⓘ Quartz

Formula: SiO₂

References:

Speight, R. (1907) On a Soda Amphibole Trachyte from Cass's Peak, Banks Peninsula. Transactions of the New Zealand Institute, 40: Art. XIV, 176-184.

ⓘ Sanidine

Formula: K(AlSi₃O₈)

References:

Speight, R. (1907) On a Soda Amphibole Trachyte from Cass's Peak, Banks Peninsula. Transactions of the New Zealand Institute, 40: Art. XIV, 176-184.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
Group 9 - Silicates
ⓘ	Arfvedsonite	9.DE.25	[Na][Na₂][Fe²⁺₄Fe³⁺]Si₈O₂₂(OH)₂
ⓘ	Sanidine	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite var. Anorthoclase ?	9.FA.35	(Na,K)AlSi₃O₈
Unclassified
ⓘ	'Amphibole Supergroup'	-	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
ⓘ	'Feldspar Group'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
H	ⓘ Arfvedsonite	[Na][Na₂][Fe₄²⁺Fe³⁺]Si₈O₂₂(OH)₂
O	Oxygen
O	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
O	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
O	ⓘ Arfvedsonite	[Na][Na₂][Fe₄²⁺Fe³⁺]Si₈O₂₂(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Sanidine	K(AlSi₃O₈)
F	Fluorine
F	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Na	Sodium
Na	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Na	ⓘ Arfvedsonite	[Na][Na₂][Fe₄²⁺Fe³⁺]Si₈O₂₂(OH)₂
Al	Aluminium
Al	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Al	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Al	ⓘ Sanidine	K(AlSi₃O₈)
Si	Silicon
Si	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Si	ⓘ Arfvedsonite	[Na][Na₂][Fe₄²⁺Fe³⁺]Si₈O₂₂(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Sanidine	K(AlSi₃O₈)
Cl	Chlorine
Cl	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
K	Potassium
K	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
K	ⓘ Sanidine	K(AlSi₃O₈)
Ti	Titanium
Ti	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Fe	Iron
Fe	ⓘ Arfvedsonite	[Na][Na₂][Fe₄²⁺Fe³⁺]Si₈O₂₂(OH)₂

Other Regions, Features and Areas containing this locality

Australian Plate

Torlesse TerraneAccretionary Complex

New Zealand

Canterbury Region
- Lyttelton volcanoVolcano
South IslandIsland

Pacific PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Speight, R. (1907) On a Soda Amphibole Trachyte from Cass's Peak Banks Peninsula, Transactions and Proceedings of the Royal Society of New Zealand, 40.

Railton, G. T., Watters, W. A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104. New Zealand Geological Survey

Quick NavTop Mineral List Rock Types Other Regions References

Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 4, 2026 08:15:51 Page updated: July 15, 2025 23:03:57

Go to top of page