四川汶川“龙溪玉”地球化学特征及三星堆、金沙玉器的产地溯源  

Geochemical Characteristics of Longxi Nephrite in Wenchuan and Origin of Sansandui and Jinsha Jades

作　　者：宋明伟 彭义伟 郎兴海[1] 程文斌[1] 欧阳辉[1] 陈曦[2] 赵甫峰[1] 彭磊[1] 蔡姬敏 许文丽 SONG Mingwei;PENG Yiwei;LANG Xinghai;CHENG Wenbin;OUYANG Hui;CHEN Xi;ZHAO Fufeng;PENG Lei;CAI Jimin;XU Wenli(College of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,Sichuan,China;School of Geoscience and Technology Southwest Petroleum University,Chengdu 610500,Sichuan,China)

机构地区：[1]成都理工大学地球与行星科学学院,四川成都610059 [2]西南石油大学地球科学与技术学院,四川成都610500

出　　处：《西北地质》2025年第2期240-260,共21页Northwestern Geology

基　　金：成都理工大学三星堆多学科综合研究项目(11400-000525-18);中国科技部“十四五”国家重点研发计划(2022YFC2905002-4);国家自然科学基金项目(41702081)联合资助。

摘　　要：四川龙溪玉在古蜀文化中扮演重要角色。为了探讨龙溪玉的地球化学识别标志及其与三星堆和金沙玉器矿料之间的关系,笔者利用X射线粉晶衍射、X射线荧光光谱、电子探针和电感耦合等离子体质谱仪等,对龙溪玉的矿物成分和主微量元素特征进行了分析。结果表明,龙溪玉为与大理岩相关的透闪石玉,含少量方解石、白云石、滑石和磷灰石等副矿物。玉石通常具有墨绿色-黄绿色-浅绿色-青灰色色环;高P、Mn、V、Cr、Ni、U含量和低δCe值(>1),LREE/HREE比值接近1,稀土元素配分曲线呈海鸥状,具明显Ce、Eu负异常特征,可以作为龙溪软玉的地球化学识别标志。龙溪玉的宝石学特征与金沙和三星堆遗址出土软玉相似,稀土元素特征和金沙遗址玉器高度一致,结合三地之间的地理位置等因素,推测四川龙溪可能是三星堆玉器和金沙玉器中软玉玉料的主要来源地。Sichuan Longxi nephrite played an important role in ancient Sichuan culture.In order to investigate the geochemical characteristics of Longxi nephrite and its relationship with Sanxingdui and Jinsha jade,the min-eral and chemical composition of Longxi nephrite were analyzed by X-ray diffraction,X-ray fluorescence,an electron probe microanalyzer,and inductively coupled plasma mass spectrometry.Longxi nephrite is a tremolite jade similar to marble that contains a minor amount of calcite,dolomite,steatite,apatite,and rutile.It typically has a dark green-yellow green-light green-offwhite color ring.The geochemical properties include high P,Mn,V,Cr,Ni and U content,and lowδCe values,and an LREE/HREE ratio close to 1.The REE partition curve is seagull-like,with clear Ce and Eu negative anomaly characteristics.The Longxi nephrite has gemological char-acteristics similar to the Jinsha and Sanxingdui jades and rare earth element properties that are extremely consis-tent with the Jinsha jades.Considering the geographical location between the three places,it is speculated that Jinsha and Sanxingdui jades may be sourced from Longxi nephrite.

关 键 词：龙溪玉 三星堆遗址 金沙遗址 地球化学特征 

分 类 号：P618[天文地球—矿床学] TS93[天文地球—地质学]