| 牛树银,孙爱群,许传诗.内蒙狼山-渣尔泰山中元古代拉张型过渡壳的形成、形变及成矿[J].地质找矿论丛,1993,(1):28-39 |
| 内蒙狼山-渣尔泰山中元古代拉张型过渡壳的形成、形变及成矿 |
| FORMATION, DEFORMATION AND MINERALIATION OF THE MID-PROTEROZOIC ERA TENSILE TRANSITIONAL CRUST IN LANG SHAN-CHAERTAI AREA, NEIMONGGU |
| |
| DOI：10.6053/j.issn.1001-1412.1993.1. 003 |
| 中文关键词: 内蒙 过渡型地壳 叠加褶皱 推覆构造 构造成矿控矿 |
| 英文关键词: |
| 基金项目:国家自然科学基金 |
|
| 摘要点击次数: 1293 |
| 全文下载次数: 1679 |
| 中文摘要: |
| 在裂解的华北地台北缘裂陷槽内,狼山-渣尔泰山中元古代拉张型过渡壳建造中,火山活动和陆源侵蚀形成的成矿元素伴随着陆源碎屑沉积形成矿源层。在长城纪末期的褶皱回返过程中,渣尔泰群经受了强烈的顺层滑动、褶皱叠加和逆冲推覆构造的改造。在东升庙-炭窑口地区,极为强烈的逆冲推覆构造导致热液蚀变作用和混合岩化,促使成矿元素迁移到裂隙发育,在有利交代作用的白云石大理岩中富集成矿。而在渣尔泰山地区和狼山北西侧,强烈的褶皱作用叠加促使矿层在褶皱的转折端部位加厚富集成矿。故此,提出了断裂成矿模式和褶皱成矿模式。 |
| 英文摘要: |
| Within split geotectogene of the northern margin of the North China plateform, the ore source beds formed in tensile transitional crust formation of Mid-Proterozoic Era of Langshan-chaertai, associated with the sedimentation of land-source clasts, which are from both volcanic activities and erosions. Duing the process of fold backevolution at the end of Changchen period, the Chaertai Group was deeply reconstructed by such structues as bedding slip, fold superposition and thrust nappe. In Dongshengmao-Tanyiaokou regions, the intensive thrust and nappe structures resulted in hydrothermal alteration and migmatization, making ore-forming elements migrate toward fissured and easy-altered dolomite-marbleand enrich to economic deposits. The intensive superposed fold in the northwestern part of Langshan and Chaertai made original ore beds more enriched and thicker at the hing zone of the folds. Both fault ore-forming model and fold ore-forming model have been established in this paper on the basis of the facts menitoned above. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
