| 贾润幸,赫英,郭键,林源,宋华平.陕西镇坪洪阳地区碱性次火山岩中稀有稀土元素地球化学特征[J].地质与勘探,2004,(5):56-60 |
| 陕西镇坪洪阳地区碱性次火山岩中稀有稀土元素地球化学特征 |
| GEOCHEMICAL CHARACTERISTICS OF RARE METAL AND REE FOR SUBVOLCANIC ALKALINE ROCK IN HONGYANG AREA,ZHENPING,SHANXI |
| 修订日期：2003-06-30 |
| DOI： |
| 中文关键词: 碱性岩 成因分析 稀有稀土元素 富集规律 秦岭 |
| 英文关键词: alkaline rock, genetic analysis, rare element and REE, enrichment rule, Qinling |
| 基金项目:国家重点基础研究发展计划(973计划) |
| 贾润幸 赫英 郭键 林源 宋华平 |
| [1]西北大学地质系，西安710069 [2]西北有色地质研究院，西安710054 [3]吉林石油集团有限责任公司地质录井公司，松原131100 |
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| 中文摘要: |
| 文章介绍了镇坪洪阳地区的区域地质概况和成矿地质条件;碱性岩的岩性组合主要以灰黑色粗面岩为主、并含有角砾熔岩,正长斑岩、正长细晶岩等.稀土、稀有元素主要富集于灰黑色粗面岩中,而在其他岩石类型中相对较少,同时岩石的片理化、黄铁矿化、硅化和碳酸盐化对稀土、稀有元素有进一步的富集作用;提出了本区的碱性岩组合具有次火山岩相的特征,讨论了本区碱性岩的成因,认为其与湖北庙垭地区的碱性岩可能均来自上地幔,并不同程度地混染了大陆壳的物质成分,其形成时代与断裂构造带的发生、发展和演化基本同步. |
| 英文摘要: |
| The regional geology and ore-forming condition in the Hongyang area, Zhenping are simply introduced. Alkaline rocks in the area are mainly composed of gray-black trachyte, and some breccia lava, syenite porphyry and syenite aplite. Rare elements and REE are mainly enriched in gray-black trachyte and less in other rocks. In addition, schistosity, pyritization, silicification and carbonation in gray-black trachyte are contributed to enrich rare element and REE. It is suggested that alkaline rocks in Hongyang area have the characteristics of subvocanics, and alkaline rocks in Hongyang and Miaoya areas all came from upper mantle and mixed with some substances of crust. Intrusion of alkaline rocks is related to the occurrence, development and evolvement of the deep rupture zone in the areas. |
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