SYDNEY, Jan 9 (Reuters) - A venture headed by China's Tianqi Lithium (002466.SZ) made an A$136 million ($94.07 million) bid to buy Australian lithium developer Essential Metals (ESS.AX), in a big test of Australian regulators' appetite for Chinese-led foreign investment. Tianqi Lithium Energy Australia (TLEA), which is 51% owned by Shenzhen- and Hong Kong-listed Tianqi Lithium Corporation and 49% by Australian miner IGO Ltd (IGO.AX), set the bid at 50 Australian cents per share. The deal requires the approval of Australia's Foreign Investment Review Board (FIRB), with Treasurer Jim Chalmers having the ultimate say. Essential Metals' shares surged as much as 40% on Monday, trading as high as 48.50 Australian cents. It expects the Essential Metals deal to be completed by May 2023.

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