摘要
早前寒武纪地质的研究进展主要表现在准大陆克拉通早期构造演化、克拉通及古老造山带深层结构、元古代超大陆恢复对比、早期地壳性质及生长等主要问题上开展多学科研究计划的实施。其中，同位素年代学，特别是锆石Ｕ－Ｐｂ方法，地震反射、Ｐ－Ｔ计算及古地磁研究对前寒武纪地质学的进展具有重要的推动作用。各个古陆克拉通区域地质学的持续研究积累，不断产生新的认识，这些新的科学思想涉及到早期陆壳组成及区划，太古代克拉通化历史，太古代－元古代界限及性质，元古代造山带网络与克拉通陆块拼合，大陆下地壳剖面及其组成等问题。华北早前寒武纪地质演化研究中的重要问题包括：华北麻粒岩相带与克拉通基底构造的关系，克拉通基底构造区划，早期陆壳性质及其记录的重大构造－热事件幕，华北克拉通与世界典型陆块构造演化对比等。
Many multi disciplinary scientific projects have been conducted in the last decade, aimed at tectonic evolution of craton and ancient orogen, their deep level structures, reconstruction and correlation of Proterozoic supercontinent, crustal nature of early continents and their growth. The development of geological techniques, such as isotopic chronology, especially, zircon U Pb age datings, seismic reflection, determination of P T, and palaeomagnetic measurement, played an important role for the understanding of Early Precambrian geology. As regional geological data for different cratonic which cover the components and tectonic division of early continental crust, tectonic evolutionary history of Archean craton, boundary between Archean and Proterozoic, Proterozoic orogen networks and collage among the cratons, exposed cross section of lower contentinal crust and their assemblages etc..The major questions assocated with Early Precambrian geological evolution of North China Carton(NCC) include tectonic relationship between north China granulite facies belt and other parts of NCC basement, tectonic division of the basement, crustal nature of Precambrian metamorphic terrains, relavent major tectono thermal episodes, correlation of NCC with other typical cratonic blocks etc..
出处
《高校地质学报》
CAS
CSCD
1998年第3期303-312,共10页
Geological Journal of China Universities
基金
国家自然科学基金
关键词
前寒武纪
地质
克拉通
构造演化
深成构造作用
Precambrian geology, craton, tectonic evolution, Early Precambrian geology of North China
