Geochronological and Geochemical Dataset of Late Paleozoic Granitoids in the Hazhu Area of Beishan, Inner Mongolia

Under  the  project  of ‘1∶5 000 Regional Geological and Mineral Survey of the Hazhu, Hazhudongshan, Hazhunanshan and Lishitan Map-sheet’ by China Geological Survey, this  dataset  was  compiled  though  rock  analysis  and  tests  based  on  detailed  geological  field surveys. This paper presents the test data of Late Paleozoic granite samples in the Hazhu area in Beishan, Inner Mongolia. The rock types include tonalite, granodiorite, monzonitic granite and alkaline feldspar granite. Zircon chronological data show that the formative era of these kind  of  rocks  are  Carboniferous –Permian.  The  whole-rock  macroelement  and  trace  element data  show  that  Carboniferous  granitoids  are  of  the  metaluminous-weak  peraluminous  and medium-K  calc-alkaline  series.  The  distribution  curve  of  rare  earth  elements  displays  rightleaning characteristics. Trace elements are rich in large-ion lithophile elements including Rb, Ba  and  K;  and  deficient  in  high  field-strength  elements  including  Nb,  Ta  and  Ti;  thus, indicating  that  magma  was  formed  in  a  continental  marginal  arc  environment  related  to  the subduction belt. In contrast, Permian granitoids display high-silicon, alkali-rich, metaluminous and magnesium-deficient features, and constitute a medium-high-K calc-alkaline series. They are  also  rich  in  large-ion  lithophile  elements  and  deficient  in  high-field  strength  elements. However,  graphic  texture  is  developed  within  alkaline  feldspar  granite  and  crystal  caves  are developed on a large scale in granodiorite, indicating that the Permian rock mass is situated in an extensional environment. The combination of the two can provide a basis and fundamental data  support  for  studying  the  subduction  polarity  and  tectonic  evolution  of  the Hongshishan –Baiheshan Ocean in the Beishan area. This dataset is presented in the form of Excel  tables,  including  two.  xls  files  (Geochemistry  data_HZ.  Xls  and  Zircon  U –Pb  dating data_HZ. xls), which record the 27 samples’ geochemical data and 11 samples’ zircon U–Pb
dating results of the samples, respectively. The samples of this dataset were all tested at the
Tianjin Center laboratory of China Geological Survey, with reliable data quality.