Lac Minerals Ltd v International Corona Resources Ltd

Lac Minerals Ltd v International Corona Resources Ltd[1] is a leading Supreme Court of Canada decision on the nature of fiduciary and confidential relationships that can be created in the course of business, together with appropriate remedies for restitution when such relationships are breached.

Lac Minerals Ltd v International Corona Resources Ltd
Hearing: 11–12 October 1988
Judgment: 11 August 1989
Citations1989 CanLII 34 (SCC), [1989] 2 SCR 574
Docket No.20571
Prior historyAPPEAL from a judgment of the Ontario Court of Appeal, (1987), 44 D.L.R. (4th) 592, (1987) 62 O.R. (2d) 1, dismissing an appeal from a judgment of R. Holland J., (1986), 25 D.L.R. (4th) 504, 53 O.R. (2d) 737.
RulingAppeal dismissed
Court Membership
Puisne JusticesMcIntyre, Lamer, Wilson, La Forest and Sopinka JJ
Reasons given
MajorityLa Forest J
ConcurrenceWilson J
Concur/dissentSopinka J, joined by McIntyre J
Concur/dissentLamer J

The facts

International Corona was a junior mining company that was investigating the mineral potential of a property at Hemlo in Northern Ontario. Lac Minerals, a senior mining company, heard of Corona's activity and arranged to visit the site. Corona showed Lac's representatives detailed information about their geological findings, together with their underlying theory about its mineral potential and importance. In further discussions about development and financing options, detailed private information was disclosed. Corona was advised by Lac to aggressively pursue the Williams property. The matter of confidentiality was not raised.

Lac proceeded to stake their own claims east of Corona's property, and acquired the property on which Corona had been working, without the latter having been advised of Lac's intentions. Subsequent attempts by Corona to negotiate the transfer of Lac's interest in the property failed.

Corona formed a joint venture with Teck Corporation to develop a mine on the Corona property, and proceeded to sue Lac for the return of the property.

The judgments below

The trial judge held that there was no binding contract, but Lac was still liable for breach of confidence and breach of fiduciary duty. He ordered the return of the property to Corona, but allowed Lac's claim in part for a lien for the cost of improvements and other payments.

The Ontario Court of Appeal affirmed the trial judge's ruling, also noting that a constructive trust was an appropriate remedy for both the breach of confidence and fiduciary duty.

The issues

There were three questions before the Supreme Court of Canada:

  • Did a fiduciary relationship exist between Corona and Lac which was breached by Lac's acquisition of the property?
  • Did Lac misuse confidential information obtained by it from Corona and thereby deprive Corona of the property?
  • If either question were answered affirmatively, what was the appropriate remedy?

Decision of the Supreme Court of Canada

The court ruled unanimously that there had been a breach of confidence, and by 3-2 it was held that no fiduciary duty existed in this case, and by 3-2 that the imposition of a constructive trust on Lac in favour of Corona was the appropriate remedy.

     = majority
     = dissent
Analysis of ruling
Issue La Forest J Wilson J Sopinka J, joined by McIntyre J Lamer J
Breach of confidence on the part of Lac Minerals Ltd Yes Yes Yes Yes
Existence of a fiduciary relationship Yes No ongoing relationship, but a fiduciary duty arose when Corona made confidential information available to Lac with respect to the Williams Property No No
Appropriate remedy Award Corona a constructive trust over that land. Damages are not an appropriate award. Imposition of a constructive trust on Lac in favour of Corona with respect to the property. The remedy of constructive trust is available for breach of confidence as well as for breach of fiduciary duty. The conventional remedies for breach of confidence are an accounting of profits or damages. Corona is entitled to damages and related interest. Concur with La Forest J.

Fiduciary relationships

There are three conditions that must be present for a fiduciary relationship to exist:

  • the fiduciary has scope for the exercise of some discretion or power;
  • the fiduciary can unilaterally exercise that power or discretion so as to affect the beneficiary's legal or practical interests; and
  • the beneficiary is peculiarly vulnerable to or at the mercy of the fiduciary holding the discretion or power.

There was no element of dependency shown in this case.

Breach of confidence

Three elements must exist for a breach of confidence to have occurred:

  • the information conveyed was confidential;
  • it was communicated in confidence; and
  • it was misused by the party to whom it was communicated.

The law of confidence and the law relating to fiduciary obligations are not coextensive and yet are not completely distinct. A claim for breach of confidence will only be made out, however, when it is shown that the confidee has misused the information to the detriment of the confider. Fiduciary law, however, is concerned with the duty of loyalty and does not require that harm result. Duties of confidence, unlike fiduciary obligations, can arise outside a direct relationship. Another difference is that breach of confidence also has a jurisdictional base at law, and accordingly can draw on remedies available in both law and equity, whereas fiduciary obligations arise only in equity and can only draw upon equitable remedies.

The court can exercise considerable flexibility in fashioning a remedy for breach of confidence because the action does not rest solely on any one of the traditional jurisdictional bases for action - contract, equity or property - but is sui generis and relies on all three.

The appropriate remedy

The constructive trust was the only appropriate remedy here, given the uniqueness of the property, given the fact Corona would have acquired the property but for Lac's breaches of duty, and given the virtual impossibility of accurately valuing the property. In addition, it was the only just remedy, regardless of whether it was based on breach of confidence or breach of a fiduciary relationship. The remedies available under one head are those available to the other. Given a breach of a duty of confidence, the finding of a fiduciary relationship was not strictly necessary.


The noteworthy aspect is that the Court is reluctant to impose fiduciary duties on arm's-length commercial parties, and that such duties should not supplant or amplify other more appropriate causes for action.

The decision has also served to consolidate the law in Canada on the nature and use of confidential information,[3] as well as to clarify the nature of fiduciary relationships and duties in Canadian law.[4][5]

Lac Minerals further confirms the divergence of Canadian common-law jurisprudence on constructive trusts to that of English law, which began to arise in Pettkus v. Becker. While English law is based on the concept of institutional constructive trusts (as it was later described by Lord Browne-Wilkinson in Westdeutsche Landesbank Girozentrale v Islington London Borough Council), Canadian courts have broadened it to include remedial constructive trusts. Australian and New Zealand jurisprudence can be characterized as falling in between the other two.[6]


  1. Lac Minerals Ltd. v. International Corona Resources Ltd. 1989 CanLII 34, [1989] 2 SCR 574 (11 August 1989)
  2. as per Sopinka J
  3. Edward Fan. "Protection of Trade Secrets and Confidential Information" (PDF). Torys LLP. Retrieved 2011-12-20.
  4. Raymond F. Leach. "The Concept and Application of Fiduciary Duty in the Realm of Securities Brokers and their Client Relations". Siskind Cromarty Ivey & Dowler LLP. Retrieved 2011-12-20.
  5. Maia Tsurumi. "UBS Directed Research Paper: Fiduciary Duties of Employees in Canada" (PDF). Fasken Martineau. Retrieved 2011-12-20.
  6. Donovan Waters QC (September 2010). "The constructive trust: two theses – England and Wales, and Canada". Step Journal. Retrieved 2011-12-20.
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