Mantle xenoliths from Zapolyarnayay pipe comparison to Novinka pipe Upper Muna freld Yakutia

      The PT estimates and geochemistry minerals for 50 xenoliths from Zapolyarnaya pipe, Upper Muna field, Yakutia were obtained fist. This pipe contain good quality diamonds and now extensively mining. The garnet geotherm for the pipe is relatively high temperature and extends to 8 GPa as well as Cpx referring mainly to refertillization type give more HT^o geotherm tracing convective branch, HT^o also exists.  Deeper part SCLM is essentially more oxidized in upper mantle section which accompany heating and fertilization of the lower part of the mantle column. Cpx refer to the garnet trend (10-20%CO₃ in melt). Mantle section is layered according to garnets showing 6 Ca-rich jets in P-CaO trend and the same for subCa garnets starting from 2 GPa in mantle section. Cr-rich (to 5% ) ilmenites found from 6 to 3 GPa suggest intensive protokimberlite metasomatism n mantle column. The structure of Novinka pipe despite on similarity contain more fertile material. Cr-Di samples show Mg# from 0.92 to 0.84. and Al –Cr-NA as well giving Ht and Lt branches. Garnets demonstrated also depletion sturting from 2 to 8 GPA and mostly LAB level. Spectra REE for garnets from xenoliths determined by (LA ICP MS) of Zapolyarnaya pipe show S type for 50 % and rarely pyroxenitic concave up patterns. The have HFSE enrichment  (mainly Zr>Hf and asynchronous Nb, Ta) LILE) for those with high REE level suggesting hydrous Phl bearing metasomatism accompanied (and before) protokimberlites. Garnets from concentrate show less HFSE enrichments. HFSE enrichment of garnets heavy concentrate and S specrums is less suggesting Cpx growth in originally dunitic varieties serving as melt feeders. Clinopyroxenes are characterized by conform REE spectrums dividing in 3 groups in REE level (100 to 10/C1). half of TRE spectra have Zr Hf, Nb maxima and often Pb Ba peaks and varying Pb. The parental melts are closer to protokimberlites. The first low REE Zr-Hf, Pb,Cr and were oxidized and high T Cr diopsides  which indicates the reduction in FO₂ during risinf and reaction of protokimberlite with the mantle.  The TERE patterns from concentrates are more variable and contain Rb, Ba,Th U peaks suggesting alkaline carbonatitic metasomatism. Amph and mica show Rb, Ba,Sr, U peaks. Garnets from Novinka pipe show less variation in HFSE and sometimes U peaks suggesting less reactions with the protokimberlites and more subduction related features. There much more hydrous metasomatic clinopyroxenes also. General, this reflects the process of polybaric interaction of the evolving proto-kimberlite melt with the depleted peridotite mantle. The focus of the interaction was in Upper Muna beneath the Zapolyarnaya pipe. Supported by  RFBR grant 19-05-00788