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Geology 300B Lab 10/11- The Sudbury Quiz.

Make a rough strike map illustrating the structure of the Huronian rocks of the eastern part of Neelon Township and the western part of Dryden Township. What is meant by 'a culminating fold pattern'? Are the intrusive gabbros of this region likely to be younger or older than the folding?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

What is the approximate regional trend of a) the Sudbury dike swarm; b) the Sudbury 'trap' dikes? In which townships does the map indicate their age relationship?

 

What mafic intrusive diabasic dike rocks cut units of the Whitewater Group?

 

What rock types makes up the Sudbury Igneous complex?

 

What unit is the thickest unit of the Sudbury Igneous complex?

 

What is the Wanapitei complex?

 

What igneous intrusive rocks cut the Huronian of Dennison and Drury Townships?

 

What is a pseudotachylite and what rock type is it associated with in the Sudbury region?

 

To what Huronian formation do the conglomerates in McKim Township belong?

 

What is unit 48 and what evidence suggests that the smaller occurrences of this unit are dike rocks?

 

Where do anorthosites occur in the Sudbury region?

 

What kinds of folds are found in the Whitewater group?

 

Where on the map is it indicated that the Nipissing Diabase is folded?

 

What kind of rocks are represented by the Creighton and Murray Plutons?

 

What age is the Levack gneiss?

 

What are the Bowell, Copper Cliff (Sudbury), and Worthington (Drury Township) offsets?

 

What mineral in particular characterizes the Sudbury diabases?

 

Find an example of unit 51b. Where is it located?

 

What is unit 26 and by what mechanism was it supposedly formed?

 

What is the likely age relationship between unit 35 and the folding of the Whitewater Group?

 

Where would you find kyanite garnet biotite/muscovite schist in the Sudbury region? What kind of sediment would be the protolith of such a rock?

 

What Huronian unit contains rhyolite?

 

What symbol is used to designate 'Shatter cones'? Cite a locality for shatter cones on the map?

 

What symbol is used to designate 'Sudbury breccia'?

 

Where are Sudbury breccias found cutting rocks of the Whitewater Group?

 

Where would you find anthraxolite in the Sudbury region?

 

With what rock units is nickel mineralization associated?

 

Where are Cu-Zn deposits found in association with Huronian rocks?

 

Where is mineralization associated with the Onaping Formation and with which member of the Onaping?

 

Where would you most likely find pillow lavas in the Sudbury region?

 

Where would you find the oldest Huronian rocks in the Sudbury region?

 

What is the orientation and relative sense of displacement of the:

a) Murray Fault?

 

b) Creighton fault?

 

Assuming that units 16b and 16c in southern Broder Township belong to the Pecors Formation of the Huronian, and given that Ramsay Lake conglomerates are present within the Grenville gneisses at Alice Lake in South-south eastern Neelon Township and the northwest corner of Awrey Township, what conclusion might you draw about the larger scale fold structure of the Huronian in the area between the Sudbury Igneous complex and the Grenville Front south of Sudbury?

 

 

Is your conclusion corroborated by the geology of the eastern part of the map sheet? If yes, explain?

 

List in point form the pre-Grenville - post Archean events that have affected the Sudbury region, indicating where on the map sheet one would find the evidence in support of your interpretation. Where appropriate you may reference the answers already given to the questions above.

 FIGURES

Structural Provinces of North America.

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