地壳深部结构探测启示与山东中生代金成矿的主要科学问题讨论

在山东省域内广泛分布有中生代形成的金矿床。涵盖胶北地块、胶南威海造山带的胶东金矿区以成矿作用强烈、赋存资源量巨大成为中国东部金成矿的典型代表，为成矿机理、成矿过程和研究对比提供了重要场所。在对胶东地区地壳深部结构探测认识进展的基础上，总结山东省中生代金成矿的时空规律，本文提出胶北地块、鲁西地块以及胶南威海造山带内中生代形成的与岩浆活动相关的内生金矿床虽具有不同成矿模式，但在成矿过程中，具有相似的成矿动力机制。通过不同构造单元内成矿模式的对比，结合已有的成矿理论和胶北地块地壳结构特征，提出在华北克拉通破坏过程中，存在以岩石圈破裂为特征的金成矿作用。成矿作用以构造体系、岩浆体系和成矿流体等要素耦合为基础，构成了各具特色的成矿系统。在阐述上述认识的基础上，本文初步梳理了进一步研究中，需要厘清和解决的部分科学问题。

Enlightenment of Deep Crustal Structure Exploration and Scientific Problems in the Study of Mesozoic Gold Mineralization in Shandong Province

Gold mineralization formed in the Mesozoic era is widely distributed in three different tectonic units in Shandong province, including Luxi block, Jiaobei block and Jiaonan Weihai orogenic belt. Jiaodong area, which covers Jiaobei block and Jiaonan Weihai orogenic belt has become a typical representative of gold mineralization in eastern China and a key area for the study and correlation of metallogenic mechanism and metallogenic process. Based on the summary of the temporal and spatial law of Mesozoic gold mineralization in Shandong province and the understanding progress of deep crustal structure exploration in Jiaodong area, it is put forward that the Mesozoic endogenous gold deposits with different metallogenic models formed in Jiaobei block, Luxi block and Jiaonan Weihai orogenic belt are differential display of different metallogenic systems related to magmatism in different environment and in different periods. Through the comparison of metallogenic models in different tectonic units, combining with the existing research progress of metallogenic theory and the characteristics of crustal structure of Jiaobei block, it is preliminarily proposed that there is a gold metallogenic process characterized by lithospheric rupture in the destruction process of North China Craton. The metallogenic process is based on the coupling of tectonic system, magmatic system and metallogenic fluid system, which constitutes a metallogenic system with its own characteristics. Therefore, the identification of metallogenic system and the characterization of different constituent elements are the restoration of metallogenic process, and the elaboration of metallogenic mechanism is a necessary means. Based on the above understanding, there aer still some problems need to be clarified and solved in further research.