The　Nanpanjiang　Basin,　one　of　the　largest　Triassic　turbidite　basins　in　the　South　China　Block,　has　long　been　disputed　with　respect　to　its　tectonic　affinity.　To　better　understand　the　tectonic　processes　of　the　basin,　we　conducted　geological　mapping,　geochronological,　and　geochemical　studies　on　the　mafic　intrusions　(the　Anding　group)　in　Funing　emplaced　within　the　southern　Nanpanjiang　Basin.　The　Anding　group　mafic　intrusions　in　Funing　consist　of　gabbronorite　and　gabbroic　diorite,　and　they　are　characterized　by　low　TiO2　(0.54-1.18　wt%)　and　Ti/Y　ratios　(162-222),　low　(La/Yb)(CN)　ratios　(3.28-4.19),　flat　REE　patterns,　pronounced　negative　Nb,　Ta　and　Ti　anomalies.　These　mafic　intrusions　can　be　further　divided　into　two　subgroups:　the　Group　1　at　244　+/-　3　Ma　and　the　Group　2　at　224　+/-　2　Ma.　The　Group　1　exhibits　negative　Eu　anomalies,　high　Th/Hf　ratios　(1.61-1.91),　high　(Sr-87/Sr-86)(i)　ratios　(0.708710-0.711843),　and　low　epsilon(Nd)(t)　values　(-6.70　to　-7.82),　while　the　Group　2　exhibits　positive　Eu　anomalies,　lower　Th/Hf　ratios　(1.05-1.07),　lower　(Sr-87/Sr-86)(i)　ratios　(0.708397-0.708425)　and　higher　epsilon(Nd)　(t)　values　(-3.28　to　-3.21).　Both　the　Group　1　and　Group　2　are　derived　from　partial　melting　of　spinel-bearing　lithospheric　mantle　and　formed　at　an　intracontinental　back-arc　setting.　These　results,　combined　with　regional　considerations,　support　a　new　model　that　the　Triassic　Nanpanjiang　Basin　is　an　intracontinental　back-arc　extensional　basin　triggered　by　the　westward　subduction　of　the　Palaeo-Pacific　Plate,　and　the　Triassic　magmatism　in　Funing　was　a　response　to　the　extension.