Subduction　of　Bangong　Suture　Ocean　and　collision　between　the　Lhasa　and　Qiangtang　blocks　were　keys　to　better　understand　the　development　of　central　Tibet.　However,　the　initiation　and　closure　timing,　and　nature　and　structure　of　the　Bangong　suture　are　still　poorly　constrained.　Mesozoic　intrusions　are　widely　distributed　in　central　Tibet.　Petrology,　geochronology　and　geochemistry　of　the　Renacuo　pluton　and　their　microgranular　enclaves　in　the　Gaize　area　to　the　north　of　the　Bangong-Nujiang　suture　zone,　south　of　the　Longmu　Co-Shuanghu　suture　zone,　are　used　to　constrain　the　tectonic　history　of　the　Bangong　suture.　Results　of　our　SHRIMP　U-Pb　dating　of　the　zircons　are　as　follows:　quartz　diorite　is　139　+/-　4Ma,　MSWD=1.6;　the　microgranular　enclave　is　147.3　+/-　3.3Ma,　MSWD=0.45.　The　evolutionary　trend　of　the　major　elements,　trace　elements　and　rare　earth　elements　of　the　microgranular　enclaves　and　the　host　rocks　are　almost　similar,　suggesting　that　the　enclaves　and　the　host　rocks　may　have　had　the　same　source.　They　most　likely　originated　from　magma　mixing　between　mantle-derived　and　crust-derived　melts.　On　the　basis　of　our　mapping　and　geochronologic　studies,　we　suggest　that　the　formation　of　the　Renacuo　pluton　is　consistent　with　previously　suggested　northward　subduction　of　the　Bangong　Suture　Ocean,　which　occurred　in　the　Late　Jurassic-Early　Cretaceous.　Copyright　(c)　2015　John　Wiley　&　Sons,　Ltd.