Petrology and geochemistry of rapakivi-type granites from the crystalline basement of NE Poland

The collection of 80 rock samples coming from drillcores of 8 localities from the Mazury Complex (Polish part of the crystalline East European Craton) and representing different rock types from monzodiorites to leucogranites, were studied for major, trace and REE elements by XRF and ICP-MS methods. The range in composition of investigating rocks varies from 46% to 76% SiO2 contents. All of them show similar REE distributions, what suggests that they are genetically linked. They also plot along a major trend with many similarities to the jotunitic liquid line of descent (LLD) defined in AMCG rocks from Rogaland (Norway). Each group of rocks has however its own characteristics considering specific elements, such as REE, Sr or Zr.