[1]张强骅,侯恩科,李焕同,等.木里煤田沉降史与控煤构造特征研究[J].西安科技大学学报,2016,(06):825-830.[doi:10.13800/j.cnki.xakjdxxb.2016.0611]
 ZHANG Qiang-hua,HOU En-ke,LI Huan-tong,et al.Subsidence history and coal-controlled structure characteristics in Muri coalfield[J].Journal of Xi'an University of Science and Technology,2016,(06):825-830.[doi:10.13800/j.cnki.xakjdxxb.2016.0611]
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木里煤田沉降史与控煤构造特征研究()
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2016年06期
页码:
825-830
栏目:
出版日期:
2016-12-30

文章信息/Info

Title:
Subsidence history and coal-controlled structure characteristics in Muri coalfield
文章编号:
1672-9315(2016)06-0825-06
作者:
张强骅12侯恩科1李焕同1张发德2鞠 崎2
1.西安科技大学 地质与环境学院,陕西 西安 710054;
2.青海省煤炭地质局,青海 西宁 810001
Author(s):
ZHANG Qiang-hua12HOU En-ke1LI Huan-tong1 ZHANG Fa-de2JU Qi2
1.College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China;
2.Qinghai Bureau of Coal Geology,Xi'ning 810001,China
关键词:
木里煤田 构造控煤 构造演化 沉降史
Keywords:
Muri coalfield coal-controlled structure tectonic evolution subsidence history
分类号:
TD 163
DOI:
10.13800/j.cnki.xakjdxxb.2016.0611
文献标志码:
A
摘要:
木里煤田位于中祁连断隆带,是祁连山含煤区的主体,盆地构造演化与中生代以来整个祁连地区构造事件紧密相关。依据区域地质调查成果、煤田地质勘查报告以及钻孔等资料,采用回剥技术分析了研究区中生代以来的沉降史及构造演化特征。沉降史模拟结果表明:侏罗纪缓慢沉降,至早白垩世快速大幅沉降,燕山运动导致晚白垩世整体隆升,转为抬升剥蚀阶段; 古近纪以来,受青藏高原隆升的影响而快速隆升剥蚀,随后新近纪以来又快速沉降; 构造运动形成的差异性升降是沉降-隆升及煤系遭受改造的主要原因。研究区控煤构造及煤系赋存特征表现为,煤系形成之后受断裂控制呈不对称向斜或单斜状,分布于逆冲断裂下盘; 向斜核部及较缓翼地层受构造破坏较小,煤系赋存稳定,为有利的赋煤区。
Abstract:
Muri coalfield is located in the middle part of the Qilian faulted uplift zone,also is the main part of Qi Lian-shan coal-bearing district,the structural evolution of Muri basin is closely related to the tectonic event in Qilian district.According to regional geological survey,drillhole and geological survey report of Muri coalfield,we analyzed the subsidence history by back-stripping method and tectonic evolution characteristics.The simulated results showed that subsiding slowly in Jurassic period then rapidly with larger subsidence scope in Early Cretaceous Epoch,uplifting and denudating Late Cretaceous by the Yanshan tectonic movement,uplifting rapidly and denudating in Paleogene according to Tibetan plateau uplift,subsiding rapidly in neogene epoch.With comparison and analysis of the fold,coal-controlled structure and sedimentary characteristics,coal occurrence regularity was controlled by fault,the coal measures were preserved well in downthrown side of thrust fault,which take on the feature of uniclinal stratum and asymmetric syncline,while coal measures were preserved in syncline and low-angle flank with less damage and buried depth of coalbed becoming helpful to coalmining.

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备注/Memo

备注/Memo:
收稿日期:2016-06-10 责任编辑:李克永
基金项目:国家自然科学基金资助项目(41502160,41472234); 中国煤炭地质总局科技发展专项(2011-1-03); 中国博士后科学基金资助项目(2016M592907XB)
通讯作者:侯恩科(1963-),男,陕西扶风人,教授,E-mail:houek@xust.edu.cn
更新日期/Last Update: 2016-11-28