A　number　of　iron　ore　deposits　and　occurrences　are　distributed　along　the　southeastern　China　coast,　and　they　constitute　an　important　Fe　metallogenic　belt　in　South　China.　However,　the　genesis　of　this　belt　remains　poorly　understood.　Here,　we　present　in　situ　U-Pb　laser　ablation-inductively　coupled　plasma-mass　spectrometry　(LA-ICP-MS)　ages　of　garnet　from　three　Fe　skarn　deposits　(Makeng,　Luoyang,　and　Yangshan)　to　constrain　the　timing　and　the　genesis　of　the　Fe　mineralization.　Electron　microprobe　analyses　of　garnet　in　association　with　magnetite　indicate　a　composition　within　the　grossular-andradite　solid　solution　series.　Garnet　from　two　Fe　skarn　ore　samples　in　the　Makeng　deposit　(430　Mt　@　41.60%　Fe)　in　the　western　part　of　the　belt　yielded　two　U-Pb　ages　of　132.9　+/-　0.9　Ma　and　131.4　+/-　1.2　Ma,　respectively.　Garnet　from　the　Luoyang　Fe　skarn　deposit　(14.4　Mt　@　42.44%Fe)　in　the　middle　part　of　the　belt　yielded　ages　of　130.7　+/-　0.7　Ma　and　131.8　+/-　1.4　Ma,　and　garnet　from　two　ore　samples　in　the　Yangshan　Fe　deposit　(37.1　Mt　@　42.82%　Fe)　in　the　eastern　part　of　the　belt　yielded　similar　U-Pb　ages　of　130.0　+/-　1.2　Ma　and　132.8　+/-　0.9　Ma.　The　consistent　ore-formation　ages,　similar　geological　characteristics,　and　close　spatial　distribution　of　these　Fe　skarn　deposits　indicate　that　they　constitute　a　newly　recognized　ca.　130　Ma　Fe　skarn　metallogenic　belt　in　South　China.　The　garnet　ages　are　in　general　agreement　with　the　crystallization　ages　of　their　associated　granitic　rocks.　The　ca.　130　Ma　iron　skarn　belt　at　the　southeastern　China　coast　formed　simultaneously　and　in　parallel　NE-trending　alignment　with　the　Handan-Xingtai　Fe　skarn　deposits　in　the　central　North　China　craton　and　the　Middle-Lower　Yangtze　River　Valley　(MLYRV)　iron-oxide　apatite　(IOA)　and　skarn　deposits　at　the　northeastern　margin　of　Yangtze　Craton　in　the　northern　part　of　Eastern　China.　Together,　these　three　ca.　130　Ma　Fe　metallogenic　belts　in　eastern　China　constitute　an　important　component　of　the　Cretaceous　post-subduction　tectono-magmatic　Cu-Au-Mo-Sn-W-Fe　metallogeny　along　the　eastern　Asian　continental　margin.