The Athabasca oil sands are the largest bitumen deposit in Canada and the only one accessible to surface mining, although recent technological breakthroughs have resulted in deeper deposits becoming producible by in situ methods.
ðɪ ˈæθɐbˌæskə ˈɔɪl sˈændz ɑːɹ ðə lˈɑːɹdʒɪst bɪtˈuːmɛn dᵻpˈɑːzɪt ɪn kˈænədə ænd ðɪ ˈoʊnli wˈʌn æksˈɛsəbəl tə sˈɜːfɪs mˈaɪnɪŋ, ɔːlðˈoʊ ɹˈiːsənt tˌɛknəlˈɑːdʒɪkəl bɹˈeɪkθɹuːz hæv ɹɪzˈʌltᵻd ɪn dˈiːpɚ dᵻpˈɑːzɪts bᵻkˈʌmɪŋ pɹədˈuːsᵻbəl baɪ ɪn sˈɪɾuː mˈɛθədz.