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《二連盆地白音查干凹陷下白堊統(tǒng)震積巖的發(fā)現(xiàn)及其地質(zhì)意義》由會(huì)員上傳分享,免費(fèi)在線(xiàn)閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、2009年3月,第15卷,第1期,57-62頁(yè)高 ?!〉亍≠|(zhì) 學(xué) 報(bào)March2009,Vol.15,No.1,p.57-62GeologicalJournalofChinaUniversities二連盆地白音查干凹陷下白堊統(tǒng)震積巖的發(fā)現(xiàn)及其地質(zhì)意義岳信東1,2,林春明1,李艷麗1,徐深謀1,張志萍1,漆濱汶1,3,王秀林4,張放東4(1.內(nèi)生金屬礦床成礦機(jī)制研究國(guó)家重點(diǎn)實(shí)驗(yàn)室(南京大學(xué)),南京大學(xué)地球科學(xué)與工程學(xué)院,南京210093;2.中國(guó)石油化工股份有限公司西北油田分公司勘探開(kāi)發(fā)研究院,烏魯木齊830011
2、;3.中國(guó)海洋石油有限公司上海分公司勘探部,上海200030;4.中國(guó)石油化工股份有限公司中原油田分公司勘探開(kāi)發(fā)科學(xué)研究院,濮陽(yáng),457001)摘要:二連盆地白音查干凹陷下白堊統(tǒng)鉆井取芯中發(fā)現(xiàn)有變形和開(kāi)裂兩類(lèi)特殊地質(zhì)現(xiàn)象。同沉積塑性變形和碟狀構(gòu)造屬于變形,微斷層、網(wǎng)狀裂縫、砂巖巖脈、角礫巖為開(kāi)裂。這些地質(zhì)現(xiàn)象具有震積巖的特征,多由外界振動(dòng)引發(fā)。變形多發(fā)生在沉積物未固結(jié)—半固結(jié)階段,開(kāi)裂發(fā)生在沉積物成巖后。微斷層、網(wǎng)狀裂縫和砂巖巖脈形成于拉張應(yīng)力作用下。這些特殊地質(zhì)現(xiàn)象多出現(xiàn)在騰格爾組和都紅木組一段,而且從下往上,
3、由開(kāi)裂向變形演化。這與當(dāng)時(shí)區(qū)域伸展構(gòu)造背景和地震、構(gòu)造活動(dòng)有關(guān),地震、構(gòu)造活動(dòng)較為強(qiáng)烈時(shí)容易產(chǎn)生開(kāi)裂現(xiàn)象,地震、構(gòu)造活動(dòng)較為微弱時(shí)容易產(chǎn)生變形。關(guān)鍵詞:震積巖;沉積變形;砂巖巖脈;伸展構(gòu)造;角礫巖中圖分類(lèi)號(hào):P588.2 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1006-7493(2009)01-0057-06TheDiscoveryofSeismitesintheLowerCretaceousofBaiyinchaganDepression,ErlianBasinandItsGeologicalI
4、mplicationsYUEXin-dong1,2,LINChun-ming1,LIYan-li1,XUShen-mou1,ZHANGZhi-ping1,QIBin-wen3,1,WANGXiu-lin4,ZHANGFang-dong4(1.StateKeyLaboratoryforMineralDepositsResearch,Inst.ofEarthSciencesandEngineering,NanjingUniversity,Nanjing210093,China;2.E&PResearchInstitu
5、teofNorthwestBranch,SINOPEC,Urumchi830011,China;3.ExplorationDepartmentofShanghaiBranchofCNOOC,Shanghai200030,China;4.ScientificResearchInstituteofExplorationandDevelopmentofZhongyuanOilfieldCompany,SINOPEC,Puyang457001,China)Abstract:InthelowerCretaceousdril
6、lingcoresofBaiyinchaganDepression,ErlianBasin,twotypesofspecialgeologicalphenomenaarediscovered,ofwhichthesyn-depositionalplasticdeformationsandsaucer-shapedstructuresbelongtodeformation,andthemicro-faults,net-shapedfractures,sanddykesandsyn-depositionalbrecc
7、iabelongtocracking.Thespecialgeologicalphenomenawereinitiatedbytheoutsideviberationandarecharacterizedbyseismites.Thedeformationphenomenaweremostlyformedduringthenon-solidification-semisolidificationphase,andthecrackingoftencameintobeingafterthediagenesis.The
8、micro-faults,net-shapedfracturesandsanddykeswereattributedtotheextensionalstresses.ThespecialgeologicalphenomenawereabundantlydistributedintheTenggeerFormationandDu1MemberofDuhongmuFormat