yamana gold incs torontolisted shares rose in early trading on tuesday after gold fields ltd said it agreed to buy it in an allstock deal that values the canadian gold producer at 67 billion at 934 am et yamanas canadian shares were trading 5 higher at c709 under the deal which has been approved by the boards of both parties south africabased mining company gold fields will offer 06 share for each yamana share which would result in gold fields shareholders owning around 61 of the companys stock while yamana holders would own the remaining 39 the combined company which will be headquartered in johannesburg will have a market capitalization of 159 billion with operations in canada australia ghana south africa as well as across south america meanwhile yamanas new yorklisted shares were up 81 at 559