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[1]倪金龙,张红,唐小玲,等.诸城盆地早白垩世砂岩主量元素地球化学特征及其对物源区构造环境的制约[J].地球科学与环境学报,2016,38(05):587-600.
　NI Jin-long,ZHANG Hong,TANG Xiao-ling,et al.Characteristics of Major Element Geochemistry from Lower Cretaceous Sandstone in Zhucheng Basin and Their Constraint on Tectonic Setting of the Provenance[J].Journal of Earth Sciences and Environment,2016,38(05):587-600.
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诸城盆地早白垩世砂岩主量元素地球化学特征及其对物源区构造环境的制约(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第38卷
期数:
2016年第05期
页码:
587-600
栏目:
基础地质与矿产地质
出版日期:
2016-09-15

文章信息/Info

Title:
Characteristics of Major Element Geochemistry from Lower Cretaceous Sandstone in Zhucheng Basin and Their Constraint on Tectonic Setting of the Provenance
文章编号:
1672-6561(2016)05-0587-14
作者:
倪金龙; 张红; 唐小玲; 史晓晓; 孙煜杰; 韩帅
1.山东省地质科学研究院 国土资源部金矿成矿过程与资源利用重点实验室，山东 济南 250013； 2.山东科技大学 地球科学与工程学院，山东 青岛 266590； 3.山东科技大学 化学与环境工程学院，山东 青岛 266590
Author(s):
NI Jin-long;  ZHANG Hong;  TANG Xiao-ling;  SHI Xiao-xiao;  SUN Yu-jie;  HAN Shuai
1. Key Laboratory of Gold Mineralization Processes and Resource Utilization of Ministry of Land and Resources, Shandong Geological Science Institute, Jinan 250013, Shandong, China; 2. College of Geological Sciences and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China; 3. College of Chemistry and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
关键词:
莱阳群; 早白垩世; 岩石地球化学; 岩石圈减薄; 盆山耦合; 盆地原型; 风化指数; 诸城盆地
Keywords:
Laiyang Group;  Early Cretaceous;  petrogeochemistry;  lithospheric thinning;  basin-mountain coupling;  basin prototype;  weathering index;  Zhucheng Basin
分类号:
P588.21.+2.3;P595
DOI:
-
文献标志码:
A
摘要:
诸城盆地作为早白垩世伸展盆地，与其东南侧胶南造山带之间的耦合关系一直以来仍缺少相关研究。基于野外地质考察、砂岩碎屑组分统计及主量元素特征分析，探讨了早白垩世诸城盆地的物源方向、莱阳群砂岩的地球化学组成、物源区风化特征及大地构造背景。结果表明：诸城盆地莱阳群砂岩地球化学类型主要为铁砂岩和杂砂岩，其源岩具有长英质火成岩或中性岩特点；砂岩的化学蚀变指数(45~58)、化学风化指数(47~69)、斜长石蚀变指数(58~73)和化学组分变化指数(0.86~1.02)体现了源区风化作用很弱的特征；Dickinson分类图解及古流向指示砂岩源区主要为盆地东南侧的胶南造山带，砂岩的地球化学组成、风化特征等共同说明早白垩世时期胶南造山带经历了快速隆升事件；结合前人关于该地区岩浆岩地球化学特征，胶南造山带的本次快速隆升是岩石圈减薄作用的结果，因而诸城盆地的快速沉降与胶南造山带的隆升是相互耦合的。上述结果一方面从地球化学角度证实了胶南造山带早白垩世时期经历了快速隆升事件，另一方面也说明了诸城盆地原型是伸展断陷盆地，二者均是华北东部岩石圈减薄作用的产物。
Abstract:
The coupling relationship between Zhucheng Basin as Early Cretaceous extensional basin and Jiaonan orogenic belt is still lack of relevant research. Based on the field geology observations, sandstone detrital component statistics and the analysis of major element characteristics, the provenance of Zhucheng Basin in Early Cretaceous, the geochemical composition of sandstone from Laiyang Group, the weathering characteristics of provenance and the tectonic background were discussed. The results show that the geochemical types of sandstone in Laiyang Group of Zhucheng Basin are mainly iron sandstone and greywacke, and the source rocks have the characteristics of felsic igneous rock or intermediate rock; the chemical index of alteration(45-58), chemical index of weathering(47-69), plagioclase index of alteration(58-73) and index of compositional variability(0.86-1.02) reflect the relative weak weathering in provenance; Dickinson classification diagrams and the paleocurrent direction indicate that the provenance of sandstone is mainly Jiaonan orogenic belt at the southeastern side of Zhucheng Basin, and the geochemical composition and weathering characteristics of sandstone suggest that Jiaonan orogenic belt experiences rapid uplift event during Early Cretaceous; combined with the previous research on the geochemical characteristics of magma rock, the rapid uplift of Jiaonan orogenic belt results from the lithosphere thinning, so the rapid subsidence of Zhucheng Basin and the uplift of Jiaonan orogenic belt are coupled with each other. From the view of geochemistry, the abovementioned results confirm that Jiaonan orogenic belt experiences a rapid uplift event during Early Cretaceous; on the other hand, it also illustrates that the prototype of Zhucheng Basin is an extensional fault basin, and both of them are the produce of lithosphere thinning in the eastern North China.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-05-04
基金项目:国家自然科学基金重点项目(41172089);国土资源部金矿成矿过程与资源利用重点实验室基金项目(2013006);山东省自然科学基金项目(ZR2013DM007)
作者简介:倪金龙(1974-),男,安徽桐城人,山东科技大学副教授,理学博士,博士后,E-mail:nijlqd@163.com。
更新日期/Last Update: 2016-09-30