| 王守伦,高元龙,孙福来.辽宁省歪头山-北台地区太古代硅铁建造特征[J].地质找矿论丛,1987,(3):8-19 |
| 辽宁省歪头山-北台地区太古代硅铁建造特征 |
| CHARACTERISTICS OF ARCHEAN IRON FORMATION IN WAITOUSHANBEITAI AREA IN LIAONING PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1987.3. 002 |
| 中文关键词: 岩石组合 原岩建造 沉积界面 陆缘凹陷带 |
| 英文关键词: |
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| 中文摘要: |
| 歪头山-北台地区是太古代鞍山群火山-沉积岩系发育较完整地段.本文侧重于原岩建造和岩石类型讨论,并提出火山沉积岩系内沉积界面对铁矿的控制因素. |
| 英文摘要: |
| This area lies in an important segment of Anshan group of Archean iron formation, with features being as follows: 1. primary rock formation comprises a complete voleanic-sedimentaly cycle consisting of basic, intermediate-acid to acid volcanics. Silica-iron sedimentation and terrigenous clastic sedimentation occurred during the interstice of volcanic aclivities; 2. seven types are classified among the various metamorphic rock types, of which the most complicated one is siliceous ferruginous sedimentary interface type; 3. the sedimeblary environment is presumed to be deep-sea marginal depression zone and iron ore deposits belong to the tele-volcano type; 4. the strong deformation of early-middle tight folds nlight thicken the orebodies occurring at diverted parts of fold to form larger ones; 5. this area belong to kata-metamorphic greenstone formation, posessing the similar greenstone series and early-late intrusive events of soda-potassium rocks. But the ultrabasic rocks of lower part are poor-developed, only minor ultramafic lava and along-strata intrusives could be seen. |
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