| 中国东部燕山期构造圈热侵蚀的原因及其成矿效应 |
| Received:August 31, 2024 Revised:January 21, 2025 点此下载全文 |
| 引用本文：ZENG PuSheng,LIU SiWen,QIU XiaoPing.2025.Causes and metallogenic effects of Yanshanian tectonospheric thermal erosion in eastern China[J].Mineral Deposits,44(1):110~123 |
| Hits: 52 |
| Download times: 33 |
|
| 基金项目:本文得到中国地质调查局中国地质科学院基本科研业务费项目（编号：JYYWF20180101）和中国地质调查局地质调查项目(编号：DD20190703)联合资助 |
|
| 中文摘要:中国东部燕山期为稳定的克拉通，可以产出含金刚石的地幔来源的金伯利岩/钾镁煌斑岩/碳酸岩等，其岩石圈厚度大于200 km，并伴有大规模成矿作用，形成高压条件下才能形成的金刚石矿床沿郯庐断裂带等深断裂带产出，并有金-铁-稀土-钨锡钼铋-铜铅锌银-汞（铊）锑砷-铷铯铍铌钽矿等大宗矿产或战略性关键矿产，并在深断裂带外侧盆地中形成铀-油气-锂钾溴碘的新能源矿产和非常规油气能源矿产。成矿作用按时代分为139 Ma和121 Ma，成矿峰期显示出幕式脉动性。这种具龙骨式的稳定地台向薄的非稳定地块演变，产生“构造圈热侵蚀”的最可能原因是新生代青藏高原的挤出效应，使东亚克拉通岩石圈向东滑移，从而使原本厚的岩石圈变形减薄，同时使先前较陡的俯冲板片变得平缓，已经变薄的中国东部岩石圈在新生代又经历了太平洋构造域北东向构造的牵拉，岩石圈进一步变薄，甚至沿张家口-蓬莱深断裂分开，形成渤海湾式的北西向构造与鸭绿江式的北东向构造共轭伸展，并伴有各类幔源岩浆作用和关键矿产（稀土-蓝宝石-金-油气-氢-氦等）。因此，中国东部是深地探测和研究的理想场所，并具有战略性矿产巨大发现潜力。 |
| 中文关键词:构造圈热侵蚀 成矿效应 燕山期 岩石圈 减薄 中国东部 |
| |
| Causes and metallogenic effects of Yanshanian tectonospheric thermal erosion in eastern China |
|
|
| Abstract:The Yanshanian eastern China is a stable craton, which can produce diamond-bearing mantle derived kimberlites/lamproites/carbonates, etc. Its lithospheric thichness is larger than 200 km and accompanied by large-scale mineralization. The diamond deposits formed under high pressure were produced along the Tanlu deep fault zone and other deep faults; while the deposits of gold/ iron/rare earth/tungsten, tin, molybdenum, bismuth/copper, lead, zinc, silver/mercury(thallium), antimony, arsenic/rubidium, cesium, beryllium, niobium, tantalum and other strategic key minerals occurred in the outer sides of diamond deposits; and in the outermost of the deep fault zone, new energy minerals and unconventional oil and gas energy minerals including uranium/oil and gas/ lithium potassium bromine iodine. The mineralization is divided into two main stages, peak ages are 139 Ma and 121 Ma, showing episodic pulsation. The most likely reason for the evolution of this keel-like stable platform attenuating as the unstable block, resulting “tectonospheric thermal erosion”, is the extrusion effect of the Tibetan Plateau in the Cenozoic, which makes the East Asian craton lithosphere slip eastward, thus thinning the originally thick lithosphere and flattening the previously steeper subduction slab. The lithosphere in eastern China, which had already been thinned, was further thinned and even separated along the Zhangjiakou-Penglai deep fault during the Cenozoic, forming the northwest structure of the Bohai Bay type and the northeast structure of the Yalujiang type. It is accompanied by various mantle-derived magmatism and key minerals(rare earth-sapphire-gold-oil-gas-hydrogen-helium, etc.). Therefore, eastern China is an ideal place for deep exploration and research, and has great potential for strategic mineral discovery. |
| keywords:tectonospheric thermal erosion metallogenic effect Yanshanian lithosphere attenuation eastern China |
| View Full Text View/Add Comment Download reader |
|
|
|
