Study on Gold Mineralization Ages in Jiaodong Area,Shandong Province

On the basis of studying geological background of gold mineralization and deep prospecting in Jiaodong area,it is summarized and found that Mesozoic tectonic evolution in this region control tectonic-magmatic events,sedimentary environment and mineralization.Magma-deposition-structure-mineralization events have mutual coupling relation with regional tectonic events.Gold mineralization and positioning have close relation with three tectonic episode,they are early Yanshanian period,middle orogenic period and late orogenic period,while have mutual coupling relation with Linglong,Guojialing and Weideshan tectonic-magmatic events.By Statistics,318 samples of gold mineralization ages in Jiaodong area can be divided into three age concentration range as 105～81 Ma,130～110 Ma and 160～141 Ma.According to mineralization and mutual coupling relation of tectonicmagmatic thermal events,it can be divided into gold molybdenum mineralization under the extrusion environment,gold and silver mineralization under the extensional environment and gold and multi-metal mineralization under the post-orogenic environment.Gold mineralization is concentrated in 120 Ma.Geological environments of Sanshandao and Jiaojia gold fields which are world-class are unique and can not be copied.