| [an error occurred while processing this directive] |
世界地质 2023, 42(1) 37-49 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
|
|
|
|
本期目录 |
下期目录 |
过刊浏览 |
高级检索
[打印本页]
[关闭] |
|
| 基础地质 |
|
|
中宁贺家口子砾石研究对青藏高原东北缘隆升提供的证据 |
|
|
陆茂欣，田景雄，李明涛，闫国祥，李黎明，谈震 |
|
|
宁夏回族自治区基础地质调查院，银川 750000 |
|
|
摘要：
对中宁贺家口子出露的新生代各层位砾石进行统计。结果显示，干河沟组、萨拉乌苏组和全新 世上部冲积层砾石成分以浅变质砂岩为主，玉门组砾石以脉石英为主，而萨拉乌苏组、全新世上部冲 积层中砾石成分出现花岗岩、片岩及石膏。砾石主要呈次圆状和次棱角状，长短轴比主要为 1 ～ 2， 为近圆状，砾石主要集中在粗砾类别，分选差至中等。砾石粒径分布曲线主要显示为近对称分布的特 征，呈宽峰正态分布。各层位砾石特征结合沉积环境演化分析表明: 寺口子组沉积时，本地区已具有 一定的高程。清水营组稳定沉积至彰恩堡组沉积结束。随后香山地区、南华山地区发生隆升，而本地 区仍为相对稳定的滨湖相、河流相沉积，一直持续至干河沟组沉积结束。之后为一段时期的沉积间 断，直至玉门组沉积。此时本地区沉积环境发生显著变化，即本地区发生隆升。而此次的隆升范围相 比之前中新世的隆升有所扩大。至萨拉乌苏组沉积时，持续的构造作用使天景山断裂发生逆冲，水系 水流方向发生改变，故萨拉乌苏组及全新统上部冲积层出现清水营组的石膏及南华山的花岗岩和片岩 砾石。说明青藏高原隆升在宁夏中南部地区表现为多期隆升，且影响范围有所不同。 |
|
|
关键词：
青藏高原东北缘
砾石统计
香山&mdash
天景山断裂
|
|
|
Evidence of tectonic uplift in northeastern margin of Tibetan Plateau: constrained by gravel of Hejiakouzi section in Zhongning County |
|
|
LU Maoxin，TIAN Jingxiong，LI Mingtao，YAN Guoxiang，LI Liming，TAN Zhen |
|
|
Institute of Geological Survey of Ningxia Hui Autonomous Ｒegion，Yinchuan 750000，China |
|
|
Abstract:
The authors selected the Hejiakouzi section in Zhongning County and statistically analyzed outcrops of gravel in various Cenozoic layers． The results indicate that the compositions of the gravel in the Ganhegou Formation，Salawusu Formation，and upper Holocene alluvium are mainly low-grade metamorphic rocks and those in the Yumen Formation are mainly vein-type quartz． Moreover，granite，schist and gypsum clasts are also present in the Salawusu Formation and upper Holocene alluvium． The gravel are mainly subrounded to subangular． The subrounded gravel have axial ratios mainly in the range of 1 to 2，indicating a nearly round shape． The gravel are mostly coarse and exhibit moderate-to-poor sorting． The distribution curve of particle sizes is nearly symmetric and exhibits a broad-peak normal distribution． By analyzing the characteristics of gravel in different layers and assessing the evolution of the sedimentary environment，the authors conclude that this region has been at a constant elevation since the deposition of the Sikouzi Formation． The deposition rate was steady from the deposition of the Qingshuiying Formation until the deposition of the complete Zhangenpu Formation． Subsequently，uplift occurred in the Xiangshan and Nanhuashan areas，while the study region continued to experience relatively steady deposition of near-shore lacustrine and fluvial facies until the deposition of the complete Ganhegou Formation． Then，a sedimentary discontinuity occurred until the deposition of the Yumen Formation． At that time，significant changes of the sedimentary environment took place in the region; specifically，uplift occurred in this area． The magnitude of this uplift was larger than that of the previous Miocene uplift． During deposition of the Salawusu Formation，persistent tectonism caused thrusting along the Tianjingshan fault and changed the flow directions of the region＇s hydrologic systems． Therefore，gypsum from the Qingshuiying Formation and granite and schist gravel from the Nanhuashan area appeared in the Salawusu Formation and upper Holocene alluvium，which indicates that the uplift of the Tibetan Plateau was a multistage process that impacted different regions in the central and southern Ningxia． |
|
|
Keywords:
northeastern margin of Tibetan Plateau
gravel statistics
Xiangshan--Tianjingshan fault
|
|
|
收稿日期 修回日期 网络版发布日期 |
|
|
DOI: |
|
|
基金项目:
|
|
|
通讯作者: |
|
|
作者简介: |
|
作者Email: |
|
|
| 参考文献： |
| |
| 本刊中的类似文章 |
| 1．邱明明, 赵艳秋, 周占江, 赵霞玉, 郭富杭. 坡度变化对原状黄土雨滴溅蚀特征的影响[J]. 世界地质, 2023,42(2): 327-333 |
| 2．张新荣, 霍元勃,谢玉祥, 高晓岩, 平帅飞,张世锋. 依兰盆地始新世沉积碎屑约束的古气候演化[J]. 世界地质, 2023,42(2): 284-296 |
| 3．赵健,方石,张新荣,李军辉, 付秀丽,白月.松辽盆地中央坳陷区晚白垩世嫩江组层序结构与沉降速率的耦合分析 [J]. 世界地质, 2023,42(2): 245-255 |
| 4． 代郑1,刘四新1,师伟1,陈春林1,罗朝鹏2,李红2. 复杂形态 UXO 频率域有限元电磁探测仿真[J]. 世界地质, 2023,42(2): 351-356 |
| 5． 韩昊天,贾可心,薛松,屈伟伟, 李立立,楼仁兴. 松辽盆地长岭断陷构造演化及沉积充填特征[J]. 世界地质, 2023,42(2): 309-317 |
| 6． 陈颖, 许卓, 韩立国, 巩向博. Radon 域虚震源法重构 VSP 数据[J]. 世界地质, 2023,42(2): 357-366 |
| 7． 杨婧婕, 尚永正,杨健,张凤君, 施春雨,李晨阳,钟爽. 磁性生物炭基 Bi 2 WO6 光催化 去除水中四环素和 Cr (Ⅵ) 的性能与机制[J]. 世界地质, 2023,42(2): 377-389 |
| 8． 金文正,王俊鹏,白万奎, 叶治续. 青藏高原东部中新生代差异隆升的热年代学证据[J]. 世界地质, 2023,42(2): 256-269 |
| 9． 王建伟, 佟智强, 宋林旭, 王忠禹, 杨洪祥, 高博. 基于模糊综合评价的牡丹江市某高速公路边坡稳定性分析[J]. 世界地质, 2023,42(2): 318-326 |
| 10． 滕民强,何浩源,李桐林,康鑫泽. 航空重力梯度试验标度场的建立方法研究[J]. 世界地质, 2023,42(2): 343-350 |
| 11． 赵艳成,田宇,张凤君. 氮硫共掺杂生物炭活化过硫酸盐 去除地下水中难降解有机污染物的效能研究[J]. 世界地质, 2023,42(2): 390-398 |
| 12． 王鑫, 王鲜, 郝业, 胡鹏, 韩秀清, 李博文, 杨亚洲. 基于加权信息量法与综合指数法的西安市蒋村街道 地质灾害易发性评价对比[J]. 世界地质, 2023,42(2): 399-243 |
| 13．沈艳杰,李嘉欣,周洋,高丹, 程日辉, 胡小强. 北黄海盆地东部坳陷中生代火山碎屑岩成岩作用特征[J]. 世界地质, 2023,42(2): 270-283 |
| 14．李小玉, 冯志强, 张虔菡, 杜兵盈, 张铁安, 王瑶, 张佳音. 小兴安岭“前寒武纪” 风水沟河群的形成时代及其构造意义:来自锆石U??Pb 年代学及古生物化石证据[J]. 世界地质, 2023,42(2): 230-244 |
| 15．刘丽娟. 海拉尔盆地乌尔逊—贝尔凹陷南屯组砂岩储层物性界限与分级评价[J]. 世界地质, 2023,42(2): 297-308 |
|
| Copyright by 世界地质 |
