Abstract:

The authors attended geological line survey and collected 20 rock samples for dating in the Western Shenzhen and National Geopark  in Eastern Shenzhen Dapeng Peninsula and other places in last 3 years. Using the new laser testing method of zircon UPb dating，  we obtained seven data sets focused on the range of 1007897 Ma，  and for the first time we found out the Neoproterozoic Jixian “Period”Qingbaikouan “Period”， and basically can confirm the existence of Jixian movement （14001000 Ma）； The ages of the Mesozoic volcanic rocks can be further divided into the Middle Jurassic and MiddleLate Jurassic volcanic rocks （1569±2 Ma， 1658±29 Ma）， the Late Jurassic volcanic rocks （14191456 Ma），  and the late Late Jurassicearly Early Cretaceous volcanic rocks （131±2 Ma1462±29 Ma）。Among the 13 data in the range of 16581391 Ma，  there are 11 data focused on the range of 14631391 Ma，  which shows the intense early Yanshanian movement （205135 Ma）in the area Shenzhen Jixian movement （14001000 Ma）mainly occurred as strong tectonic movement between the Mesoproterozoic and the Neoproterozoic； the metamorphic rocks underwent strong compression，  and close linear folds，  regional metamorphism and migmatization occurred. Yanshanian movement in the local district can be distinguished two stages，  the early and the late，  and the early movement was dominant. Meanwhile the early movement can be further divided into 14 screens and the late movement was the 5th screen. The intensely tectonic movement was related to the subduction of the Pacific plate into the Eurasian plate. The Yanshanian movement was mainly the folding and faulting，  volcanic eruptions，  magma intrusion and some areas’ metamorphism. According to new data measured in the study area we carried out the analyses of the main tectonic movements； for the southern tectonic belt of the east Guangdong Lotus Hill area，  we have studied its isotopic geochronology，  the time of its formation，  its evolutionary history，  and its structural mechanisms and kinetics； these studies are of important practical significance.

Key words:  , zircon UPb dating with laser testing； Jixian movement； early Yanshan movement； Shenzhen Area