摘要
文章简述了新疆地区的地质理论研究成果、矿产地质特征,认为准噶尔、塔里木双亚幔柱是新疆金属矿产呈现"8"字型分布的主要控制因素;双亚幔拉主体形成时期分别为石炭纪和二叠纪。准噶尔亚幔柱斜向天山造山带,塔里木亚幔柱近垂直,前者作用强烈、短暂,后者温和而漫长。准噶尔、塔里木盆地周缘薄弱带与内部构造体制为地幔深源岩浆及后碰撞造山岩浆的上侵提供了通道。天山造山带形成于晚石炭世,它受双亚幔柱挤压隆起作用有限,成矿局部叠加;二叠纪以来,以相对南北向挤压为主,是能源矿产主要形成时期;阿尔金、昆仑等山脉在新近纪快速隆升。基于幔枝构造启示,建议金属矿产地质找矿勘查与石油、煤炭及铀矿地质勘查展开合作,在准噶尔、塔里木两盆地内进行金属矿产综合找矿。
Based on results of theoretical research of geology, geological characteristics of mineral re- sources in Xinjiang we consider that the double secondary mantle plume （one occurs in Junggar and the other in Tarim ） model is the main control factor of metal mineral resources in the areas which are distrib- uted in form of “8”. The double secondary plumes were formed in Carboniferous and Permian periods re- spectively. The plume in Junggar area is oblique to Tianshan mountain and the plume in Tarim area is nearly vertical. The former is strong in activity and short in active time; the latter is gentle and long. The periphery weak belts of Junggar and Tarim basins and their internal tectonic regime provide channel for upwelling of the mantle and post--collision orogenic magma. The Tianshan mountain orogenic belt was formed in Late Carboniferous period and its uplift caused by the double secondary plume model is limited and the ore--forming process of the two plumes only overprinted locally. Since Permian period Arqin, Kunlun etc. mountains uplifted abruptly. Enlightened by the model we propose that departments con- cerned with metal mineral resources and petroleum and coal energy resources should cooperate make inte- gration of metal mineral resources prospecting in Junggar and Tarim areas in future.
出处
《地质找矿论丛》
CAS
CSCD
2015年第2期174-181,共8页
Contributions to Geology and Mineral Resources Research
基金
我国典型金属矿科学基地研究项目(编号:200911007)
国家自然科学基金项目(编号:40872137)联合资助
关键词
双亚幔柱模式
幔枝构造
“8”字型成矿
控矿机制
新疆
double-secondary mantle plume model
mantle branch structure
metal mineralization inform of “8”
ore-control mechanism
Xinjiang
