伸展盆地动力学研究中的火山岩REE反演技术

THE VOLCANIC ROCK REE INVERSION TECHNOLOGY USED IN THE STUDY OF EXTENSIONAL BASIN DYNAMICS

章大港 李晓清 史卜庆 李茹 周瑶琪

ZHANG Dagang LI Xiaoqing SHI Puqing LI Ru ZHOU Yaoqi

石油大学地球化学与岩石圈动力学开放实验室, 山东东营 257061 2. 中国科学院兰州地质所, 甘肃兰州 730000 3. 胜利油田东胜公司, 山东东营 257015

Open Laboratory of Geochemistry & Lithosphere Dynamics, University of Petroleum, Dongying, Shandong 257061, China 2. Lanzhou Institute of Geology, Lanzhou, Gansu 73000 china 3. Dongsheng Company, Shengli Oilfiled, Dongying, Shandong 257015, China

该文在阐述伸展盆地中伸展作用与火山作用、岩浆作用之间的关系的基础上,介绍了伸展盆地动力学研究中的火山岩稀土元素反演技术理论基础和主要内容。列举了火山岩REE反演过程中的主要步骤和参数选取。相对于正演方法,这一技术的优势在于对初始模式的依赖性大大减小,从而使其效率和可信度得到可靠的保证。这一技术的应用可以为伸展盆地动力学研究提供重要的关于伸展因子、势温度、熔融体厚度、岩石圈初始厚度等方法的参数约束,具有广阔的应用前景。

In this paper, the relationships among extension, volcanism and magmatism in extensional basins are expounded. On this basis, the theoretical basis and major contents of the volcanic rock REE inversion technology in the study of extensional basin dynamics are introduced, and the main approaches and parameter selection during the volcanic rock REE inversion course are listed. Compared with positive methods, the inversion technology has greathy decreased dependence on initial models. This advantage assures its efficiency and reliability. The application of this technology can provide important parameter restriction on extentional factor, potential temperature, the thickness of molten mass, the initial thickness of lithosphere, etc. to the study of extensional basin dynamics, and has broad prospects.

国家973项目(G199043302);教育部青年骨干教师基金(K000110A)

https://doi.org/10.11781/sysydz200103327