Does it mean "Egypt decided to increase the supplies for 2017" or "Egypt held a bid and Qatar won the bid to supply LNG to Egypt"? http://www.oxfordlearnersdictionaries.com/definition/english/tender_2
"Egypt last year awarded a large tender for 2017 supplies, much of it sourced from Qatar, although traders said rising domestic output and alternative sources including Norway, Nigeria and the United States could fill a potential gap."
Source: http://af.reuters.com/article/egyptNews/idAFL3N1J220N
Best Answer
One definition of tender from Merriam-Webster:
Replace the words "awarded a large tender" with "paid a lot of money" and I think it helps to easily decipher the precise meaning that was intended here. The former phrase does have the additional connotation that contractual agreements are most likely involved, but at base, it really does simply mean that Egypt paid a lot of money for supplies in 2017, and they got most of those supplies from Qatar.
Note that I believe the source contains a grammatical error that makes it more difficult to understand. No matter what you interpret "award" or "tender" to mean, clearly those things came from Egypt and were not "sourced" from Qatar. For this reason, "much of it" is incorrect. There's no correct or logical antecedent for "it" in the sentence.