The source , on the Venezuelan-Brazilian border , at 1,047 m ( 3,435 ft ) of elevation ( 02 ° 19 ′ 05 ″ N 63 ° 21 ′ 42 ″ W \ / 2.31806 ° N 63.36167 ° W \ / 2.31806 ; -63.36167 ) , was explored in 1951 by a joint Venezuelan-French team .
This is on the border between Venezuela and Brazil , at 1,047 m ( 3,435 ft ) high ( 02 ° 19 ′ 05 ″ N 63 ° 21 ′ 42 ″ W \ / 2.31806 ° N 63.36167 ° W \ / 2.31806 ; -63.36167 ) .