The Relationship Between Thrust-Fault And The Syntectonic Magmatism In Chuanken-Tongshan,Northeastern Jiangxi Province

The Thrust-fault in Chuankeng-Tongshan and Northeastern of Jiangxi lie in the eastern Jiangnan Orogen, and close to Wuyi fault systems which located in northwestern Huaxia plate, belong to the combining site of Huaxia and Yangzi plate. Affected in the large scale movement of East Asia lithosphere since Middle Jurassic. Nappe and Magmatic activity widely distributed. Along with a series types of Mineralization.To seek the relationship between Nappe, Magmatic and Mineralization, based on the field geological investigation, we analyzed the base type of the Nappe structure and features of deformation. And discussed the forming age. In addition, through the Chronology and features of Rock geochemical, Achieve the main conclusion as the following:(1).Chuankeng-Tongshan copper was under the control of a nappe which composed of middle Carboniferous to lower Triassic, Underlying formation was Linshan formation belong Lower Jurassic. During Nappe-reserving-intrusion, the different surface of Lithologic slipped and become the main ore-controlling structure.(2).The age of The ore-forming rock mass was 170 Ma, similar to the age of nappe.So we get a conclusion that the nappe and intrusion was happened at the same time. The Magmatic was Syntectoniced.(3).The Magmatic was high-K calc-alkaline, volcanic arc belong to Active continental margin. Mineralize happened in the subduction of The Pacific Ocean. crustal thickening in Horizontal compressive, induced the deep Magma remelting, and intusive along the Thrust-faul and Detachment fault.(4).The age of Chuankeng-Tongshan copper was similar to many typical deposit in Northeastern Jiangxi, as Dexing copper, was the product of Early Yanshanian. And happened in the same Geotectonic environment. Show that they are belong to the same Mineralization system, suggested that there are large scale of Tectonic-magma Mineralization in Yanshanian at Northeastrn Jiangxi.