The tectonic evolution of the southern segment of TanchengLujiang fault zone and the metallogenesis in its adjacent region：Implications
from the high precision geochronology
Hua LinBao1,2,3 Zhen Yunqing1,4,5 Zeng Chaowei1,5 Wang Lei1,5 Dai Baozhang1 Ding Meihua1,5 Yuan Jie1,5 Yang Wei1,5 Wu Jing1,5
1.East China Mineral Exploration and Development Bureau|Nanjing 210093； |2.East China of Institute of Geochemical Exploration and Marine Geological Survey|Nanjing 210007； |3.Department of Earth Sciences|Nanjing University|Nanjing 210093； |4.Third Branch of China Metallurgical Geology Branch|Taiyuan 030002； 5.Team 814|East China Mineral Exploration and Development Bureau|Zhenjiang|Jiangsu 212005)
TanchengLujiang(TanLu)fault zone is a lithospheric deep fault zone with the trending of NNENE in eastern China. There are four concentrated mineral areas which including Au mine of Jiaodong Peninsula，FeAu mine of western Shangdong Province，FeCu mine of the middle and lower reaches of the Yangtze River and oil and gas field of northern Jiangsu Province. Based on a large amount of high precision dating data，the tectonomagmaticmineralization events of these areas can be classified into three phases： 1)Early phase(800～550 Ma). In this phase，panpaleocontinent breakup commenced in Neoproterozoic，paleoseism occurred in Caledonian and local volcanicsedimentary exhalative in shallow marine environments in Hercynian demonstrated that the “tectonic activity prelude” of crustal movement had been unclosed. The prior tectonic weakness belt of North China Craton lithosphere was succeeded and constructed in this phase，which can described as metallogenesis preparation period. 2)Main phase(180～110 Ma). The present tectonic frame of TanLu fault zone was accomplished by continent collision of Yangtze Plate and northern China Plate in Triassic，and dive of west Pacific Plate in Mesozoic to Eurasian Plate. Especially in around 140～120 Ma，calcalkaline，highK and high Sr calcalkaline magmas as well as metallogenesis fluids in the late stages of magmatism ascent made violent activities and deposited as metallogenesis along favourite tectonic space. Crustal thinning，crustmantle delamination and mantlederived magma underplating led to the appearance of syntexistype and transformationtype granites which is not due to any single tectonic movement. This phrase can be described as summit grade. 3)Late phase(60 Ma～now). There is usually olivebasalt spouting along the junctions of EW and NNE(or NE)trending faults，which offers heat and material sources for the formation of oil and gas. This phase is the declining period of tectonicmagamatism.
. The tectonic evolution of the southern segment of TanchengLujiang fault zone and the metallogenesis in its adjacent region：Implications
from the high precision geochronology[J]. Chinese Journal of Geology, 2010, 45(02): 509-536.