The Kongling complex,an important part of the basement block for the Yangtze Craton,is exposed in the northern of the Huangling anticline in western Hubei province. It mainly consists of TTG gneisses, amphibolites and khondalite series. The amphibolites were derived from uhramafic-mafic volcanic rocks, and the TTG gneisses were derived from TTG granites. The amphibolites are occurred surrounding TTG gneisses as adjoining rocks, and inside TTG gneisses as enclaves. This study focuses on the amphibolites as adjoining rocks. The whole-rock Sm-Nd isochron age of 2 998.9 Ma on the amphibolites, this age are interpreted as eruption time of ultramafic-mafic volcanic rocks. According to CL images and Th/U ratios, all zircons from amphibolites can be divided into two types： Protolith igneous zircon and metamorphic growth zircon. The protolith igneous zircons show a core-rim structure,and the cores have well- developed magmatic oscillatory zoning, and the rims are thin and bright. Their U-Pb spot analysis were done on cores, and the results form a discordia with the upper intercept at 3 013 ± 23 Ma,MSWD = 0.38, this age are same interpreted as eruption time of uhramafic-mafic volcanic rocks. In addition, the protolith igneous zircons U-Pb age is 3.0 Ga for the amphibolites as enclaves. Therefore, both of the amphibolites as adjoining rocks or enclave, their protolith rocks were formed in the same time of 3.0 Ga. After this, the ultramafic-mafic volcanic rocks belt was intruded by TTG granites so that the Archean granite-greenstone terrain formed. Experienced the first and second metamorphic event, the Archean granite-greenstone terrain was transformed to Neoarchean stable landmass. Based on trace elements and isotope geochemical data, it is inferred that the uhramafic-mafic volcanic rocks is formed continental initial rift. The metamorphic growth zircons have such internal structure as cloudy zoning, sector zoning, planar zoning,indicating they were formed in amphibolite-facies. These zircon U-Pb analysis results form a discordia with the upper intercept at 2 043 ±51 Ma, MSWD = 50, this age is interpreted as the timing of the third thermal metamorphic event, which may be related to the assemblage of Columbia supercontinent. During the third metamorphic event,the detrital sedimentary rock was transformed to Khondalite, which was tied to Neoarchean stable landmass, so that the Huangling crystalline basement was formed in Early Proterozoic.
