摘要
勉略宁地区位于秦岭造山带的南缘，因其南紧邻扬子地台，长期的地壳开合历史使本区地层组合、构造格局异常复杂。最近的研究将勉略宁地区分为鱼洞子地体和碧口地体，其接触部位的东沟坝组火山岩带表现出与两地体不同的地质特点。经岩石组合、岩石化学、微量元素、稀土元素及矿产组合的分析对比，表明此带为两地体的拼接带。
The Mianluening region lies on the southern edge of the Qinling orogenic belt. As the region adjoins the Yangzi platform,the stratigraphical association and tectonic pattern are very complicated caused by the long-time combining and splitting of the earth's crust. According to recent research, the Mianluening region is divided into two terrains i. e., the Yudongzi Terrain and the Bikou Terrain. The volcanic rocks belt of the Donggouba Group is different from those of either of the terrains.According to analysis and comparison of rock association, petrochemistry, microelements, REE and mineral association, a conclusion can be drawn that the volcanic rocks belt of the Donggouba Group is the amalgamation belt between the two above-mentioned terrains.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1998年第2期163-169,共7页
Geotectonica et Metallogenia
