(Adds details, updates prices) Aug 10 (Reuters) - Canada’s main stock index rose to a record high on Tuesday, as heavyweight energy and mining sectors bounced back from steep losses, although investors remained on edge due to rising COVID-19 cases worldwide. * At 9:38 a.m. ET (13:38 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 85.57 points, or 0.42%, at a record high of 20,522.99. * The energy sector jumped 1.7% after tumbling more than 2% on Monday, with oil prices rising on signs of strong demand in Europe and the United States, despite higher coronavirus cases in Asian importer-nations. * The materials sector, which includes precious and base metals miners and fertilizer companies, rose 0.5% after marking its worst day in three weeks, as concerns over Chilean supply supported copper prices, and precious metal prices stabilized. * Still, concerns over rising virus cases saw investors piling on technology stocks, which rose 1.1%. The sector has proven to be resilient to virus-related disruptions over the past year. * On the TSX, 139 issues were higher, while 82 issues declined for a 1.70-to-1 ratio favouring gainers, with 16.10 million shares traded. * The largest percentage gainer on the TSX was Nuvei Corp , which jumped 14.3% after the payment services provider delivered better-than-expected quarterly numbers. * Transalta Renewables fell 5.8%, the most on the TSX, while the second-biggest decliner was Centerra Gold , down 2%. * The most heavily traded shares by volume were Enbridge Inc , Manulife Finl, and Nevada Copper. * The TSX posted 8 new 52-week highs and 4 new lows. * Across all Canadian issues there were 57 new 52-week highs and 18 new lows, with total volume of 26.96 million shares. Reporting by Ambar Warrick; Editing by Vinay Dwivedi and Sherry Jacob-Phillips Our Standards: The Thomson Reuters Trust Principles.