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《黑龍江七星河含煤盆地古近紀(jì)-新近紀(jì)沉積相及層序地層特征-論文.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第26卷9期中國(guó)煤炭地質(zhì)Vo1.26No.O92014年9月COALGEOLOGYOFCHINASep.2014doi:10.3969~.issn.1674—1803.2014.09.01文章編號(hào):1674-1803(2014)09-0001—07黑龍江七星河含煤盆地古近紀(jì)一新近紀(jì)沉積相及層序地層特征商曉旭,邵龍義,馬立軍,野兆瑞,曲延林(1.中國(guó)礦業(yè)大學(xué)q匕京),北京100083;2.黑龍江省煤田地質(zhì)局,黑龍江哈爾濱150006)摘要:黑龍江省東部七星河盆地是一新生代聚煤盆地,其含煤地層為古近系
2、寶泉嶺組、新近系富錦組。寶泉嶺組由各級(jí)砂巖、泥巖、炭質(zhì)泥巖以及褐煤組成,發(fā)育濱淺湖相、深一半深湖相、三角洲平原相,屬于湖泊沉積體系、三角洲沉積體系。富錦組主要由泥巖、粉砂巖、中砂巖、含礫粗砂巖及煤層、炭質(zhì)泥巖、硅藻巖組成,發(fā)育濱淺湖相、扇三角洲平原相,分別屬于湖泊沉積體系和扇三角洲沉積體系。層序sI相當(dāng)于寶泉嶺組,發(fā)育低位體系域、湖侵體系域和高位體系域,煤層主要發(fā)育高位體系域中后期,成煤環(huán)境以濱淺湖淤積沼澤為主。層序SII相當(dāng)于富錦組,主要發(fā)育湖侵體系域、高位體系域,局部地區(qū)發(fā)育低位體系域,煤層亦
3、主要發(fā)育高位體系域中后期,成煤環(huán)境以扇三角洲淤積沼澤和濱淺湖淤積沼澤為主。層序sI、sII的高位體系域中后期,盆地基底沉降速率和物源供給處于相對(duì)平衡狀態(tài),主要發(fā)育了扇三角洲淤積沼澤、濱淺湖和濱淺湖淤積沼澤環(huán)境,發(fā)育可采煤層。關(guān)鍵詞:七星河盆地;古近紀(jì);新近紀(jì);寶泉嶺組;富錦組;聚煤作用中圖分類(lèi)號(hào):P534.6;P539.2文獻(xiàn)標(biāo)識(shí)碼:APaleogene—-NeogeneSedimentaryFaciesandSequenceStratigraphicCharacteristicsinQixing
4、heCoal—bearingBasin,Heilon~iangShangXiaoxu。,ShaoLongyi,MaLijun,YeZhaorui。andQuYanlin(1.ChinaUniversityofMiningandTechnology(Beijing),Beijing100083;2.HeilongjiangBureauofCoalGeologicalExploration,Harbin,Heilongjiang150006)Abstract:TheQixingheBasinineas
5、ternHeilongiiangisaCenozoiccoalaccumulationbasin.Itscoal—bearingstratabelongtoPaleo-geneBaoquanlingFormationandNeogeneFujinFormation.TheBaoquanlingFormationiscomprisedofsihstone,sandstoneofvariousgrainsizes,mudstone,carbonaceousmudstoneandlignite;deve
6、lopedlittoral—shallowlacustrinefacies,deep—semideeplacustrinefa-cies,deltaplainfaciesbelongtolakesedimentarysystem,lakedeltasedimentarysystem.TheFujinFormationiscomprisedofmud-stone,sihstone,medium—grainedsandstone,pebblycoarse—grainedsandstone,coal,c
7、arbonaceousmudstoneanddiatomite;developedlittoral—shallowlacustrinefacies,fandehaplainfacies,belongtolakesedimentarysystemandfandeltasedimentarysystemrespective-ly.SequenceSIise0rrespondingtoBaoquanlingFormation;developedlowstandsystemtract,lacustrine
8、transgressivesystemtractandhighstandsystemtract.Coalseamsweremainlydevelopedduringmiddletolatestagesofhighstandsystemtract;coal—formingenviron-mentWaSmainlylittoral-'shallowlacustrinesiltingbog.SequenceSIIiscorrespondingtoFujinFormation;mainly