标明日期的高精确锆石 U-Pb 显示那主要恼人的身体(Tongan, Niumiao, Huashan, Lisong ) ,并且在 Huashan-Guposhan 建筑群的一块 mafic microgranular 被外国领地包围的土地在 160163 妈被形成。从 Huashan 花岗石的锆石的 ? Hf (t) 价值变化从 ? 2.8 变化到从 Lisong 花岗石的 +0.3 和那些从 ? 2.3 到 +0.3,它与从 Lisong 花岗石的 mafic 被外国领地包围的土地的那些价值(到 +7.4 的 +2.6 ) 显然是不同的。这些 Hf 同位素的数据显示 mafic 被外国领地包围的土地和主机花岗石从岩浆的不同来源被使结晶,为 mafic-felsic 岩浆混合提供证据处理。最高 ? 从 mafic 被外国领地包围的土地的锆石的 Hf (t) 价值直到 +7.4,显示 mafic 岩浆从相对弄空的披风来源被发源。在这个区域的地区性的地质学和同时期的 mafic 和碱的岩石上的研究显示 mafic 岩浆没从玄武岩的少年外壳重做,但是从披风的部分融化被发源。然而, mafic 岩浆是否从岩流圈或 lithospheric 披风的部分融化被导出,尚待被决定。Huashan 花岗石和 Lisong 花岗石从导出披风、导出外壳的岩浆的混合岩浆被形成,并且 mafic 被外国领地包围的土地在混合过程期间被看作导出披风的岩浆的遗体。从 Niumiao 闪长岩的锆石的 ? Hf (t) 价值变化从 ? 1.1 变化到从 Tongan 石英二长岩的 +2.1,和那些从 ? 1.7 到 +1.7。这些价值是比从 mafic 被外国领地包围的土地的那些低的,建议闪长岩和二长岩从有 mafic 被外国领地包围的土地的不同导出来源的岩浆被形成。为 Niumiao 闪长岩和 Tongan 二长岩的 ? Hf (t) 价值仅仅比为 Hushan 花岗石和 Lisong 花岗石的那些稍微高。丰富的 mafic 被外国领地包围的土地也发生在 Niumiao 闪长岩并且在 Tongan 二长岩。因此,我们建议 Niumiao 闪长岩和 Tongan 二长岩也可能从象花岗石的一样的混合岩浆被形成,但是通过部分结晶化和外壳的污?
High precision zircon U-Pb dating indicates that main intrusive bodies (Tong'an, Niumiao, Huashan, Lisong), and a marie microgranular enclave in the Huashan-Guposhan complex were formed at 160-163 Ma. The εHf(t) values of zircons from the Huashan granite vary from -2.8 to +0.3 and those from the Lisong granite vary from -2.3 to +0.3, which are obviously different with those values (+2.6 to +7.4) of the mafic enclaves from the Lisong granite. These Hf isotopic data indicate that the mafic enclaves and host granites were crystallized from different sources of magmas, providing evidence for mafic-felsic magma mixing processes. The highest ear(t) value of zircons from the marie enclaves is up to +7.4, indicating that the marie magma was originated from a relatively depleted mantle source. Studies on regional geology and the contemporaneous mafic and alkaline rocks in this area indicate that the marie magma was not originated from reworking of basaltic juvenile crust, but from partial melting of the mantle. However, it remains to be resolved whether the mafic magma was derived from partial melting of the asthenosphere or the lithospheric mantle. The Huashan granite and the Lisong granite were formed from hybrid magma of mantle-derived and crust-derived magmas, and the marie enclaves are considered as remains of mantle-derived magma during mixing processes. The εHf(t) values of zircons from the Niumiao diorite vary from -1.1 to +2.1, and those from the Tong'an quartz monzonite vary from -1.7 to + 1.7. These values are lower than those from the marie enclaves, suggesting that the diorite and monzonite were formed from different source-derived magmas with the marie enclaves. The εHf(t) values for the Niumiao diorite and the Tong'an monzonite are only slightly higher than those for the Hushan granite and the Lisong granite. Abundant mafic enclaves also occur in the Niumiao diorite and in the Tong'an monzonite. Thus, we suggest that the Niumiao diorite and the Tong'an monz