earth science

Lac des Îles igneous complex

Lac des Îles igneous complex is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Lac des Îles igneous complex rather than just read about it. In short: The Lac des Îles igneous complex of northwestern Ontario, Canada is a layered gabbroic intrusion which is the host for the largest palladium orebody in Canada. The orebody is currently being mined as a combined open pit and underground operation by North American Palladium.

Key takeaways

Lac des Îles igneous complex belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Lac des Îles igneous complex to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Lac des Îles igneous complex from memory before moving on to harder problems.

Reference excerpt

The Lac des Îles igneous complex of northwestern Ontario, Canada is a layered gabbroic intrusion which is the host for the largest palladium orebody in Canada. The orebody is currently being mined as a combined open pit and underground operation by North American Palladium. The complex is located in the Canadian Shield some 85 kilometers northwest of Thunder Bay, Ontario and Lake Superior at 49.10.00 N 089.36.00 W. The complex includes gabbro, pyroxenite, gabbronorite and websterite intrusive into granitic gneiss country rock. The ore minerals occur within gabbroic pegmatites and gabbro breccia zones. The Archean complex has been dated at 2738 ±27 Ma by Sm–Nd dating on pyroxenite. The Roby Zone orebody of the complex is a platinum group elements deposit with associated gold, copper and nickel mineralization. Ore mineralogy includes pyrrhotite, pentlandite, chalcopyrite, pyrite and the rare platinum group element minerals: vysotskite (Pd,Ni)S, braggite (Pt,Pd,Ni)S, kotulskite Pd(Te,Bi)1–2, isomertieite Pd11Sb2As2, merenskyite (Pd,Pt)(Te,Bi)2, sperrylite PtAs2 and moncheite (Pt,Pd)(Te,Bi)2.

Worked examples

Example 1 — a first encounter with Lac des Îles igneous complex

Start with the simplest possible case. Write down what Lac des Îles igneous complex claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Lac des Îles igneous complex before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Lac des Îles igneous complex ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Lac des Îles igneous complex

In research: Lac des Îles igneous complex appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Lac des Îles igneous complex in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Lac des Îles igneous complex is common in secondary-school and first-year university syllabi. It links to neighbouring topics Economic geology, Igneous petrology of Ontario, Layered intrusions, so understanding it makes those chapters shorter.
In everyday life: Look for Lac des Îles igneous complex outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Lac des Îles igneous complex in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lac des Îles igneous complex means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Lac des Îles igneous complex out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lac des Îles igneous complex in simple terms?

Why does Lac des Îles igneous complex matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Lac des Îles igneous complex?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Lac des Îles igneous complex.