滇西石缸河—志本山早奥陶世花岗岩成因: 岩石地球化学，锆石U-Pb年代学和Hf同位素约束

本数据包括花岗岩的全岩地球化学、锆石年代学及其Hf同位素数据。样品采自云南西部漕涧—泸水志本山地区花岗岩，花岗岩的围岩为中元古统地层。主量数据通过Ｘ射线荧光光谱仪获得，微量元素通过电感耦合等离子体发射光谱仪，锆石U-Pb同位素采用激光剥蚀等离子体质谱仪，锆石Lu-Hf同位素激光剥蚀多接收电感耦合等离子体质谱仪获得。结果表明，研究区花岗岩具有富硅（w(SiO2)=75.18%～77.59%）、富碱（w(Na2O+K2O)= 7.22%～8.46%）和过铝质（IA/CNK =1.06～1.16）特点，富集LILE，相对亏损HFSE，与S型花岗岩特征相似。花岗岩（SGH-4）锆石U-Pb年龄为475.6±3.7Ma，锆石εHf(t)为-12.48～-3.09，平均-7.12，TDM为1229～1645 Ma；二长花岗岩（ZBS-6）锆石U-Pb年龄为473.8±4.2Ma，锆石εHf(t)为-11.4～-5.23，平均-7.55， TDM为1300～1569 Ma。以上数据表明，花岗岩形成于早奥陶世，为中元古代古老围岩地层物质重熔的产物，形成于后碰撞环境，与腾冲—保山地块早奥陶世大规模岩浆活动有关。

This dataset includes whole-rock geochemical, zircon geochronological, and zircon Hf isotopic data of granites. The samples were collected from the granites in the Zhibenshan area of Caojian-Lushui, western Yunnan, and the wall rocks of the granites are Mesoproterozoic strata. Major element data were obtained via X-ray fluorescence spectrometry (XRF), trace element data via inductively coupled plasma optical emission spectrometry (ICP-OES), zircon U-Pb isotopes via laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and zircon Lu-Hf isotopes via laser ablation multiple-collector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS). The results show that the granites in the study area are characterized by high silica (w(SiO₂) = 75.18%–77.59%), high alkali (w(Na₂O + K₂O) = 7.22%–8.46%), and peraluminous (IA/CNK = 1.06–1.16), enriched in large-ion lithophile elements (LILE) and relatively depleted in high-field-strength elements (HFSE), which is similar to the characteristics of S-type granites. For the granite (SGH-4), the zircon U-Pb age is 475.6 ± 3.7 Ma, the zircon εHf(t) values range from -12.48 to -3.09 with an average of -7.12, and the TDM ages are 1229–1645 Ma; for the monzogranite (ZBS-6), the zircon U-Pb age is 473.8 ± 4.2 Ma, the zircon εHf(t) values range from -11.4 to -5.23 with an average of -7.55, and the TDM ages are 1300–1569 Ma. The above data indicate that the granites formed in the Early Ordovician, which are the products of partial melting of ancient wall rock strata from the Mesoproterozoic, formed in a post-collisional setting, and are related to the large-scale magmatism of the Tengchong-Baoshan block during the Early Ordovician.