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时间:2020-05-01
《华北板块南缘北东地区构造特征及矿井瓦斯主控因素.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第26卷8期中国煤炭地质Vo1.26No.082014年8月COALGEOLOGYOFCHINAAug.2014doi:lO.3969~.issn.1674—1803.2014.08.07文章编号:1674—1803(2014)08—0029-05华北板块南缘北东地区构造特征及矿井瓦斯主控因素胡社荣,张渝,岳婷,彭纪超,张学庆,张运勋,于明达,李小飞(中国矿业大学(JL京)地球科学与测绘工程学院,北京100083)摘要:通过华北板块南缘北东地区的弧形构造特征、形成时代和瓦斯分布特征的研究,得出如下结论:①徐宿弧形构造限于丰沛断裂与蚌埠隆起北缘的
2、五河断裂问,为形成于早三叠世后、晚侏罗世前的推覆构造;其形成与动力来源可能是扬子板块沿着郯庐断裂带向西或北西方向俯冲于华北板块之下的碰撞拼贴作用。②徐宿弧形推覆构造中和面外侧引张、内侧挤压的构造应力场是导致位于弧形内侧的宿东向斜内煤矿瓦斯富集、外侧闸河向斜瓦斯含量相对较少的主因之一;煤矿区内岩浆岩体(脉)的侵入改变了这种本应规律的瓦斯分布图案。岩浆活动和构造作用共同构建了华北板块南缘北东地区的构造和瓦斯分布图案。关键词:徐宿弧形构造;华北板块南缘北东地区;瓦斯分布岩浆岩体(脉)中图分类号:P618.130.1;P542文献标识码:AStruct
3、uralFeaturesandMainMineGasControllingFactorsiUNortheasternPartofNorthChinaPlateSouthMarginHuSherong,ZhangYu,YueTing,PengJichao,ZhangXueqing,ZhangYunxun,YuMingdaandLiXiaofei(SchoolofGeosciences&SurveyingEngineering,CUMTB,Beijing100083)Abstract:Throughstudiesonarcuatestructura
4、lfeatures,formationageandgasdistributioncharacteristicsinthenorthernpartofNorthChinaPlatesouthmargincametothefollowingconclusions:1.TheXuzhou—SuzhouarcuatestructureislimitedwithintheFengxian—PeixianfaultandWuhefaultonnorthmarginofBengbuuplift,isanappestructureformedafterEarl
5、yTriassic,beforeLateJurassic;itsoriginanddynamicsourcearepossiblyfromcollisionandcollageofYangtzeplatesubductedbeneathNorthChinaplatealongtheTancheng—Lujiangfaultedzonewestwardornorthwestward.2.StructuralstressfieldofXuzhou—Suzhouarcuatenappestructureneutralplaneextendedouts
6、ideflankandcompressedinsideflankisoneofthemajorcausationsbringoncoalminegasconcentrationinSudongsynelinelocatedinsideoftheareuatestructure,whilelessgascontentinoutsideZhahesyncline.Magmaticrockbody(dike)intrudedintocoalmineareahaschangedthegasdistributionpatternoughttoberegu
7、lar.Thus,magmaticactivitiesandstructuraleffectstogetherconstructedstructuresandgasdistributionpatterninnortheasternpartofNorthChinap/atesouthmargin.Keywords:Xuzhou—Suzhouarcuatestructure;northeasternpartofNorthChinaplatesouthmargin;gasdistribution;magmaticrockbody(dike)在河南、安
8、徽、江苏省境内,华北板块南缘是指体、“背负”式(Piggy—back)推覆体、滑脱构造组北界大致沿丰沛断裂西端至丰沛断裂东端,东界和合同、徐宿复杂滑脱
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