| 山东省烟台市牟平区宋家沟金矿区内莱阳群林寺山组砾岩碎屑锆石UPb年龄地质意义 |
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| 引用本文： | 杨庆,祝德成,张海瑞,吕大炜,刘泽群,许庆林,沈晓丽,薄军委.山东省烟台市牟平区宋家沟金矿区内莱阳群林寺山组砾岩碎屑锆石UPb年龄地质意义[J].山东国土资源,2018,34(3). |
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| 作者姓名： | 杨庆 祝德成 张海瑞 吕大炜 刘泽群 许庆林 沈晓丽 薄军委 |
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| 作者单位： | 山东科技大学地球科学与工程学院,山东省地质调查院,山东省第四地质矿产勘查院,山东科技大学地球科学与工程学院,山东科技大学地球科学与工程学院,山东科技大学地球科学与工程学院,山东省第三地质矿产勘查院 |
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| 摘 要： | 山东省烟台市宋家沟牟平区金矿区内发育有莱阳群林寺山组砾岩,该组砾岩分选性较差,既有近椭圆磨圆度极高砾石,也有棱角分明无磨圆砾石,反映了砾岩源区复杂的特点。该文对砾岩内碎屑锆石U-Pb年龄段的分析得到碎屑锆石年龄分别落入640~770Ma,540~570Ma和(228±4)Ma,通过对这些年龄时段的分析,新元古代活动大陆边缘事件的花岗质片麻岩、震旦纪时代的岩体、柳林庄序列喷出岩都可能是其母岩。根据研究区内此类岩石的出露情况分析得到其近源与远距离搬运沉积两种结果,并与前人研究相对比,得到该组砾岩物源区为苏鲁造山带,说明在胶莱盆地形成之初,东北缘的物源区就以苏鲁造山带为主。该认识对于研究胶东地区的造山带不同时期地质事件具有重要意义。
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| 关 键 词： | 莱阳群林寺山组 砾岩 锆石UPb定年 胶莱盆地 山东烟台 |
Geological Significance of Zircon U-Pb Age of Conglomerate Detrital in Linsishan Formation of Laiyang Group in Songjiagou Gold Deposit in Muping District in Yantai City of Shandong Province |
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| YANG Qing,ZHU Decheng,ZHANG Hairui,LV Dawei,LIU Zequn,XU Qinglin,SHEN Xiaoli and BO Junwei.Geological Significance of Zircon U-Pb Age of Conglomerate Detrital in Linsishan Formation of Laiyang Group in Songjiagou Gold Deposit in Muping District in Yantai City of Shandong Province[J].Land and Resources in SHANDONG Province,2018,34(3). |
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| Authors: | YANG Qing ZHU Decheng ZHANG Hairui LV Dawei LIU Zequn XU Qinglin SHEN Xiaoli and BO Junwei |
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| Abstract: | Conglomerate of Laiyang group in Linsishan formation developed in Songjiagou gold deposit in Muping district in Yantai city of Shandong province. The conglomerate in this group has poor soring. There are not only nearly elliptic conglomerate with High grinding roundness, but also sharp conglomerate with no grinding roundness. It reflects the complexity of the conglomerate source area. In this paper, through analysis on zircon U-Pb ages of the debris in the conglomerate, it is determined that the zircon U-Pb ages of debris are 640~770Ma, 540~570Ma and 228±4Ma respectively. Through analysis on these age periods, it is indicated that Neoproterozoic granitic gneiss rock, the rock in Sinian era, Liulinzhuang sequence extrusive rocks may be the source rocks. According to the analysis on the outcropping of such rocks in the study area, two results are obtained from near source and long distance transport deposition. Comparing with previous achievements, it is concluded that the conglomerate source area is Sulu orogenic belt. It is showed that at the beginning of the formation of Jiaolai basin, the source area of the northeastern margin was dominated by Sulu orogenic belt. This understanding is of great significance to the study of geological events in different periods of the orogenic belt in Jiaodong area. |
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