Lithoprobe


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	Movie about Lithoprobe

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		Overview of Earth The Growth of Canada Tools and Methods
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	Lithoprobe Presentations

	Multidisciplinary studies
		Lithoprobe techniques 12 elephants dancing in unison Seismic reflection method Vibrators Evidence for plate tectonics occuring 2,700,000,000 years ago! What is a terrane?

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media > slideset > the Growth of Canada >

the Growth of Canada

	The Precambian Heartland		Archean Cratons -- Real Oldtimers: A Short Primer on How Geological Times are Crystal Clear

Tectonic map of North America.	Geological time table.	Tectonic elements of North America, with the sedimentary cover removed.	Mass spectrometer.
	Proterozoic Times Stitch Large Quilt

Zircon crystal. Image is from a scanning electron microscope. Red shades show high uranium content; green shades show low uranium content.	Tectonic elements of North America, with the sedimentary cover removed.	Tectonic provinces of the North Atlantic region.	Total magnetic field map of the ECSOOT region showing relationship of magnetic images to tectonic features.

Tectonic elements of North America, with the sedimentary cover removed.	Geological map of the exposed Early Proterozoic Trans-Hudson Orogen between the Archean Superior craton to the southeast and Archean Hearne craton to the northwest.	A geological cross-section showing the principal tectonostratigraphic units of the Trans-Hudson Orogen. It is based on seismic reflection profiles (whose locations, lines 2, 3, and 9, were shown in the previous slide), as well as on geological information obtained at the surface and from drill cores, and on potential field maps. The stippled lines indicate in schematic fashion the dip and the frequency of seismic reflections.	Tectonic elements of western Canada. Dark blue lines denote seismic reflection profiles and the dashed red line shows the northern limit of sedimentary cover.

Aeromagnetic potential field map of western Canada. White lines denote seismic reflection profiles.	Tectonic domains in the basement of Alberta and northeastern British Columbia. These maps were imaged from the interpretation of potential field data (aeromagnetics) and geochronological analyses (uranium-lead isotopes) of drill cores taken from the basement rock.	The Slave-Rae collision.	Showing the relative movements of the Rae, Superior and HEarne cratons to each other, mostly in the Trans-Hudson domain, but also in parts of Alberta.
	The Completion of the Canadian Shield -- 1,000 Ma Ago

Oblique Rae-Hearne collision.	Tectonic elements of North America,	Outcrop at Georgian Bay.	Deep seismic reflections from the Grenvill Front Tectonic Zone.

Location of GLIMPCE seismic reflection profiles.	Line diagram and simplified model based on reflection data along the eastern par of profile J.	Tectonic elements of North America.	Geological map for western Ontario showing subprovince divisions of the Superior province and planned seismic lines.

Locations of Abitibi and its surrounding subprovinces and the Grenville Province within the Canadian Shield.	Schematic geological map of the Abitibi greenstone belt and surrounding geological features.	Generalized geological map of the Kapuskasing Structural Zone (KSZ) and surrounding region.	Cross section of Kapuskasing Structural Zone.

Aeromagnetic map with colour-shaded relief, set parallel to Matachewan dykes to suppress the dyke signature and empasize local structure.	Generalized geological map of the K apuskasing Structural Zone (KSZ) and surrounding region.	Cross section of Kapuskasing Structural Zone.	Aeromagnetic map with colour-shaded relief, set parallet to Matachewan dykes to suppress the dyke signature and emphasize the structure. White lines show seismic reflection profiles.

Location of LITHOPROBE geophysical profiles on a simplified geological map of the Great Lakes regions.	Seismic record section of the central portion of line F. The prominent layering of the syn-rift deposits between 10 and 30 km depth are shown clearly.	Stylized model of the upper crustal velocity structure along profile A. HZ-Hinge zone; IRF-Isle Royale fault; KF-Keweenaw fault; SS-Superior Shoals. Note the vertical exaggeration of 3:1.	Gravity map for Lake Superior and surrounding regions. Note the strong positive contrast of the rift valley to its surrounding rocks. The reason for the positive anomaly was not understood until the results of our studies in the Great Lakes - the large volume of dense volcanics in the rift valley causes the anomaly. Data compilation and plotting by the Geophysics Division of the GSC (Geological Survey of Canada.)
	North America Grows Young or How Young America Grew	Appalachia, You Still Look Beautiful!

Aeromagnetic map for the Lake Superior and surrounding regions.	Simplified tectonic element map of North America with transects marked. The boxes outline the areas in which LITHOPROBE is studying some of the major features we have discussed. Soon we’ll be considering the LE (for LITHOPROBE East) region.	Geological Time Scale	Simplified tectonic element map of North America.
		The Growing West

Base map of the Newfoundlan Appalachians showing tectonostratigraphic zonation, simplified surface geology, and the location of the three seismic reflection corridors (numbered black lines) used by LITHOPROBE	Interpretative cartoon of the final stage of the collision between the Laurentian and Gondwanan plates.	Map of the Canadian portion of the North American Cordillera that indicates the collage of accreted terranes.	Subduction of the oceanic Juan de Fuca plate under Vancouver Island.


Central portion of regional cross section through the Southern Cordillera.

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