Abstarct: The Chekneh Miocene subvolcanic domes with dacite and trachydacite compositions are located in 110 km NE of Sabzevar and are parts of North Sabzevar-South Quchan magmatic belt. The dome rocks have porphyry, sieve, trachytic and glomeroporphyritic textures, and consist of plagioclase and amphibole phenocrysts. They also contain SiO2= 63.49-68.61 wt%. baxsed on primitive mantle normalized spider and chondrite-normalized REE patterns, they study rocks are enriched in LREE and LILE and depleted in HREE and HFS. They show calc-alkaline affinity with significant negative HFS (e.g., P, Nb and Ti) anomalies which are characteristic of those magmas formed in an active continental margin. baxsed on SiO2, high Sr/Y and low K2O/Na2O ratios, and low Y, Yb, Cr and Mg concentrations, the study rocks are similar to high-silica adakites (HSA). Thus, it seems that the parent magma of the study domes was originated from amphibole eclogite or garnet amphibolite rocks of a mextamorphosed Neotethys ocean lithosphere beneath the southern part of eastern Alborz during Miocene. The initial 87Sr/86Sr (0.7039-0.7043) and ɛNd10Ma (2.9-4.98) of the Chekaneh domes are similar to MORB compositions, that are coincided with those adakites originated from the partial melting of Cenozoic oceanic lithosphere.