GEOCHEMICAL CHARACTERISTICS OF THE EARLY MESOZOIC GRANODIORITES AND THEIR TECTONIC IMPLICATIONS

• 作 者: PENGTouping XIXianwu WANGYueju
• 机 构: GuangzhouInstituteofGeochemistry,GuangzhouInstituteofGeochemistry,GuangzhouInstituteofGeochemistry,T
• 出 处: 大地构造与成矿学：英文版
• 发表日期: 2005年1期
• 关键词: 花岗闪长岩 碱性钙 中生代 湖南东北部 calc-alkaline granodiorites lower-middle crustal source intr
• 基金项目: 国家自然科学基金，中国科学院知识创新工程项目，CAS Key Laboratory of Isotope Geochronology and Geochemistry

The early Mesozoic granodiorites (ca. 165 Ma) in the northeastern Hunan Province (NEH) have SiO2=65.4-69.65%, K2O/Na2O=0.95-1.38 and K2O+Na2O＞6%, A/CNK=0.96-1.13 and belong to metaluminous high-K calc-alkaline series. They are characterized by LREE and LI