TY - RPRT TI - Mesoproterozoic rapakivi granites of the Rondonia Tin Province, southwestern border of the Amazonian craton, Brazil-I. Reconnaissance U-Pb geochronology and regional implications AU - Jorge S. Bettencourt AU - R. M. Tosdal AU - W.B. Leite AU - B.L. Payolla PY - 1999 DO - 10.1016/s0301-9268(98)00126-0 UR - https://pubs.usgs.gov/publication/70021758 ID - 70021758 ER -