The Spawning Lake Stock is an
Archean
The Archean Eon ( , also spelled Archaean or Archæan) is the second of four geologic eons of Earth's history, representing the time from . The Archean was preceded by the Hadean Eon and followed by the Proterozoic.
The Earth
Earth ...
age
granitoid
A granitoid is a generic term for a diverse category of coarse-grained igneous rocks that consist predominantly of quartz, plagioclase, and alkali feldspar. Granitoids range from plagioclase-rich tonalites to alkali-rich syenites and from quartz ...
stock
In finance, stock (also capital stock) consists of all the shares by which ownership of a corporation or company is divided.Longman Business English Dictionary: "stock - ''especially AmE'' one of the shares into which ownership of a company ...
in
Northeastern Ontario
Northeastern Ontario is a secondary region of Northern Ontario in the Canadian province of Ontario, which lies north of Lake Huron and east of Lake Superior.
Northeastern Ontario consists of the districts of Algoma, Sudbury, Cochrane, Timiska ...
,
Canada
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
, located in
Briggs Township
Briggs Township is a geographic township comprising a portion of the municipality of Temagami in Northeastern Ontario, Canada. It is used for geographic purposes, such as land surveying and natural resource
Natural resources are resources ...
and
Chambers Township of
Temagami
Temagami, formerly spelled as Timagami, is a municipality in northeastern Ontario, Canada, in the Nipissing District with Lake Temagami at its heart.
The Temagami region is known as ''n'Daki Menan'', the homeland of the area's First Nations commu ...
. It
intrudes through the
Tetapaga Syncline, a major geologic fold in the
Temagami Greenstone Belt
The Temagami Greenstone Belt (TGB) is a small 2.7 billion year old greenstone belt in the Temagami region of Northeastern Ontario, Canada. It represents a feature of the Superior craton, an ancient and stable part of the Earth's lithosphere t ...
. However, it remains undeformed by strain associated with the formation of the fold. The stock is intruded by
dikes
Dyke (UK) or dike (US) may refer to:
General uses
* Dyke (slang), a slang word meaning "lesbian"
* Dike (geology), a subvertical sheet-like intrusion of magma or sediment
* Dike (mythology), ''Dikē'', the Greek goddess of moral justice
* Dikes, ...
composed of
biotite
Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula . It is primarily a solid-solution series between the iron-endmember annite, and the magnesium-endmember phlogopite; more alumino ...
lamprophyre
Lamprophyres () are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks, and small intrusions. They are alkaline silica-undersaturated mafic or ultramafic rocks with high magnesium oxid ...
on its outer margins.
See also
*
Iceland Lake Pluton The Iceland Lake Pluton, formerly known as the Ingall Lake Batholith, is a large granitic intrusion in Briggs and Strathcona townships of Temagami, Northeastern Ontario, Canada. It is one of the three separate granitoid intrusions that constitute ...
*
Chambers-Strathy Batholith
The Chambers-Strathy Batholith, also called the Strathy-Chambers Batholith, is a large granitoid batholith complex in the Temagami region of Northeastern Ontario, Canada. Named for the Chambers and Strathy townships, its compositions range from pi ...
References
Geology of Temagami
Archean magmatism
Igneous petrology of Ontario
Stocks (geology)
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