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鲁西地区石门山岩体主要岩性为片麻状花岗闪长岩,原划为新太古代早期侵入岩。根据新测锆石SHRIMPU-Pb年龄为(2530±8)Ma,其形成时代确定为新太古代晚期。凤仙山岩体为中粒二长花岗岩,锆石SHRIMP U-Pb年龄为(2513±12)Ma,并侵入片麻状花岗闪长岩。石门山岩体属峄山岩套,为TTG质花岗岩,是地幔岩浆侵入混入地壳物质形成的。凤仙山岩体属傲徕山岩套二长花岗岩,为上地壳物质重熔(深熔)作用形成的。峄山岩套TTG类岩石是2560~2530 Ma壳幔岩浆活动的产物,岩体普遍具有片麻状构造,表明经历变质变形作用。未受区域变质作用的傲徕山岩套大规模壳源花岗岩是2530~2500 Ma地壳物质部分熔融形成的,与华北克拉通新太古代末超大陆拼合有关,2530 Ma是鲁西地区重要的构造热事件发生时期。 相似文献
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"蜀中多仙山,峨眉邈难匹",是大诗人李白赞美峨眉山的诗句。峨眉山以优美的自然风光和神话般的佛国仙山而驰名中外。峨眉山是我国的四大佛教名山之一,位于四川中南部, 相似文献
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目的:对香葛茯茶的主要药效学进行研究。方法:通过观察香葛茯茶对自由饮食实验小鼠体质量、摄食量以及食物利用率方面的影响研究其促消化功效;通过观察香葛茯茶对实验小鼠脾指数和胸腺指数的影响研究其对免疫功能的调节作用;通过观察香葛茯茶对实验大鼠排便情况的影响研究其促排便的功效;通过观察香葛茯茶对自发性高血压大鼠(SHR)模型收缩压的影响研究其对血压的调节作用。结果:香葛茯茶能够显著降低自由饮食小鼠的体质量和食物利用率,与空白对照组比较,差异有统计学意义(P<0.05或P<0.01);香葛茯茶能增加小鼠胸腺指数与脾指数,与空白对照组比较,差异有统计学意义(P<0.05);香葛茯茶在给药4周后能够略微降低SHR尾动脉收缩压(SP),与模型对照组比较,差异有统计学意义(P<0.05)。结论:香葛茯茶具有减肥、增强免疫、促消化的作用,长期饮用还具有调节血压的功效。 相似文献
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The Junggar Immature Continental Crust Province and Its Mineralization 总被引:22,自引:4,他引:18
WANG Jingbin WANG Yuwang WANG Lijuan Beijing Institute of Geology for Mineral Resources Beijing 《《地质学报》英文版》2004,78(2):337-344
According to the study on the peripheral orogenic belts of the Junggar basin and combined with the interpretation of geophysical data, this paper points out that there is an Early Paleozoic basement of immature continental crust in the Junggar area, which is mainly composed of Neoproterozoic-Ordovician oceanic crust and weakly metamorphosed covering sedimentary rocks. The Late Paleozoic tectonism and mineralization were developed on the basement of the Early Paleozoic immature continental crust. The Junggar metallogenic province is dominated by Cr, Cu, Ni and Au mineralization. Those large and medium-scale deposits are mainly distributed along the deep faults and particularly near the ophiolitic melange zones, and formed in the Late Paleozoic with the peak of mineralization occurring in the Carboniferous-Permian post-collisional stage. The intrusions related to Cu, Ni and Au mineralization generally have low Is, and positive εNd(t) values. The δ34S values of the ore deposits are mostly near zero, and t 相似文献
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