辽西北票盆地中侏罗统海房沟组砾岩沉积特征与成因
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摘要
通过对总长2 705m两条剖面的实测、40块薄片鉴定、419个砾石统计及其粒度分析,确定了辽西地区北票盆地中侏罗统海房沟组砾岩的沉积特征及成因。研究表明:辽西北票盆地海房沟组主要岩性为一套冲积扇相的复成分砾岩,并夹一套喷溢相下部亚相安山质角砾熔岩和另一套爆发相空落亚相安山质角砾凝灰岩、热碎屑流亚相安山质角砾凝灰熔岩;海房沟组沉积物源来自研究区SSW向的太古宇变质岩及结晶基底和下侏罗统兴隆沟组火山岩的全面快速隆升剥蚀。结合构造背景,通过对北票组与海房沟组界线的研究和岩性岩相的鉴定,确定海房沟组冲积扇相的复成分砾岩是燕山运动二期挤压伸展构造运动的重要产物,两套中酸性火山岩的出现是两次火山喷发的重要标识。
The sedimentary characteristics and genesis of the Middle Jurassic conglomerates in Haifanggou Formation were determined by measuring the 2 705 mlong two sections,identifying 40 micro-sections,and analyzing 419 gravel statistical particle size in Beipiao basin in western Liaoning.The main lithology of Haifanggou Formation in the northwest Liaoning is a set of compound conglomerate which is an alluvial fan facies including two series of intermediate-acid volcanic rocks,namely the lower effusive facies,air-fall and pyro-clastic flow deposit of explosive facies.The source of Haifanggou Formation is from the SSW area,where the Archaean metamorphic rock,crystalline basement and the volcanic rocks of Xinglonggou Formation in the Lower Jurassic were generally rapidly uplift and denuded.Based on the study of the tectonic setting of the area,the boundary between Beipiao Formation and Haifanggou Formation and the sedimentary characteristics of Haifanggou Formation,the multicomponent conglomerate is an important product of the tectonic movement of compression and extension in the second phase of Yanshanian movement,and the two series of intermediate-acid volcanic rocks are the important indicators of volcanic eruption.
The sedimentary characteristics and genesis of the Middle Jurassic conglomerates in Haifanggou Formation were determined by measuring the 2 705 mlong two sections,identifying 40 micro-sections,and analyzing 419 gravel statistical particle size in Beipiao basin in western Liaoning.The main lithology of Haifanggou Formation in the northwest Liaoning is a set of compound conglomerate which is an alluvial fan facies including two series of intermediate-acid volcanic rocks,namely the lower effusive facies,air-fall and pyro-clastic flow deposit of explosive facies.The source of Haifanggou Formation is from the SSW area,where the Archaean metamorphic rock,crystalline basement and the volcanic rocks of Xinglonggou Formation in the Lower Jurassic were generally rapidly uplift and denuded.Based on the study of the tectonic setting of the area,the boundary between Beipiao Formation and Haifanggou Formation and the sedimentary characteristics of Haifanggou Formation,the multicomponent conglomerate is an important product of the tectonic movement of compression and extension in the second phase of Yanshanian movement,and the two series of intermediate-acid volcanic rocks are the important indicators of volcanic eruption.
引文
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(1)辽宁省地质局区域地质测量第三分队.中华人民共和国1∶20万地质图K-51-19(朝阳幅).北京:全国地质资料馆,1962.
[2]辽宁省地质矿产勘查开发局.辽宁省岩石地层[M].武汉:中国地质大学出版社,1997.Liaoning Bureau of Geology and Mineral Exploration.The Rock Stratigraphy of Liaoning Province[M].Wuhan:China University of Geosciences Press,1997.
[3]张栋,张梅生,王旖旎,等.辽宁兴城龙回头盆地海房沟组地层序列及沉积环境研究[J].地质与勘探,2012,48(2):227-236.Zhang Dong,Zhang Meisheng,Wang Yini,et al.Stratigraphic Sequence and Sedimentary Environment of the Haifanggou Formation in the Longhuitou Basin of Xingcheng,Liaoning Province[J].Geology and Exploration,2012,48(2):227-236.
[4]闫义,林舸,李自安.辽西北票盆地侏罗系充填序列及对区域构造演化的指示[J].地层学杂志,2002,26(2):151-155.Yan Yi,Lin Ge,Li Zian.Characteristics of the Jurassic Filling Sequence and the Indication of Tectonic Evolution of Beipiao Basin,Western Liaoning[J].Jounal of Stratigraphy,2002,26(2):151-155.
[5]和政军,牛宝贵,张新元.辽西朝阳地区晚侏罗世逆冲断裂及同构造沉积盆地系统[J].地质论评,2007,53(2):152-163.He Zhengjun,Niu Baogui,Zhang Xinyuan.Late Jurassic Thristing and Syntectonic Sedimentary Basin Systems in the Chaoyang Region,Western Liaoning[J].Geological Review,2007,53(2):152-163.
[6]李伍平.辽西中侏罗统海房沟组火山岩的地球化学特征[J].地球科学:中国地质大学学报,2013,36(6):1153-1168.Li Wuping.Geochemical Characteristics of the Middle Jurassic Volcanic Rocks of Haifanggou Formation,Western Liaoning Province,North China[J].Earth Science:Journal of China University of Geosciences,2013,36(6):1153-1168.
[7]武广,李之彤,王文武.辽西地区中侏罗世海房沟组火山岩地球化学特征及其地质意义[J].岩石矿物学杂志,2004,23(2):97-108.Wu Guang,Li Zhitong,Wang Wenwu.Geochemical Characteristics of the Middle Jurassic Volcanic Rocks from Haifanggou Formation in Western Liaoning Area and Geological Significance[J].Acta Petrologica et Mineralogica,2004,23(2):97-108.
[8]武广,李忠权,李之彤.辽西中侏罗统海房沟组埃达克质岩的确认及地质意义[J].成都理工大学学报(自然科学版),2003,30(5):457-461.Wu Guang,Li Zhongquan,Li Zhitong.Identification of Adakite-Like Rocks in the Middle Jurassic Volcanic Rocks from Haifanggou Formation in West Liaoning Area and Its Geological Significance[J].Journal of Chengdu University of Technology(Scicence&Technology Edition),2003,30(5):457-461.
[9]廖林,陈汉林,程晓敢,等.帕米尔东北缘新生代隆升活动:来自奥依塔格剖面砾石统计的证据[J].地球科学:中国地质大学学报,2012,37(4):791-804.Liao Lin,Chen Hanlin,Cheng Xiaogan,et al.Cenonzoic Uplift of the Northeastern Pamir:Evidence from the Gravel Counting Results of the Oytag Section[J].Earth Science:Journal of China University of Geosciences,2012,37(4):791-804.
[10]陆俊吉,胡煜昭,江小均,等.新疆乌恰萨热克铜矿北矿带库孜贡苏组沉积相、古流向、物源区及其找矿意义:来自砾石统计分析的证据[J].地质通报,2016,35(6):963-970.Lu Junji,Hu Yuzhao,Jiang Xiaojun,et al.Sedimentary Facies,Paleocurrent,Provenances and Prospecting Pignificance of Kuzigongsu Formation in the Northern Orebelt of the Sareke Copper Deposit in Wuqia,Xinjiang:Evidence from Gravel Statistic Analysis[J].Geological Bulletin of China,2016,35(6):963-970.
[11]陈欢庆,舒治睿,林春燕,等.粒度分析在砾岩储层沉积环境研究中的应用:以准噶尔盆地西北缘某区克下组冲积扇储层为例[J].西安石油大学学报(自然科学版),2014,29(6):6-12.Chen Huanqing,Shu Zhirui,Lin Chunyan,et al.Application of Grain-Size Analysis in Research of Sedimentary Environment of Conglomerate Reservoir:Taking Alluvial Fan Reservoir in the Lower Member of Kelamayi Formation in Some Area of the Northwestern Margin of Zhunger Basin as an Example[J].Journal of Xi’an Shiyou University(Natural Science Edition),2014,29(6):6-12.
[12]周叶,张露.疏勒河冲积扇沉积物粒度特征及其古气候环境分析[J].科技通报,2014,30(9):27-33.Zhou Ye,Zhang Lu.Grain Size Characteristics of Sediments from Shulehe Alluvial Fan and Analysis on Its Paleoclimatic Environment[J].Bulletin of Science and Technology,2014,30(9):27-33.
[13]赵红梅,刘林敬,赵华,等.滹沱河古河道剖面粒度参数特征及沉积环境[J].现代地质,2016,30(2):485-492.Zhao Hongmei,Liu Linjing,Zhao Hua,et al.Grain Size Character and Sedimentary Environment of Hutuo River Paleochannel Section[J].Geoscience,2016,30(2):485-492.
[14]闫义,林舸,陈卓.北票盆地侏罗纪砾岩沉积特征及对区域构造演化的指示[J].大地构造与成矿学,2001,25(4):361-367Yan Yi,Lin Ge,Chen Zhuo.Depositional Characteristics of Mesozoic Cobglomerates and the Indication to the Structural Development of Beipiao Basin[J].Geotectonica et Metallogenia,2001,25(4):361-367.
[15]肖晨曦,李志忠.粒度分析及其在沉积学中应用研究[J].新疆师范大学学报(自然科学版),2006,25(3):118-123.Xiao Chenxi,Li Zhizhong.The Research Summary of Grain Size Analysis and Its Application in the Sedimentation[J].Journal of Xinjiang Normal University(Natural Sciences Edition),2006,25(3):118-123.
[16]彭成名,王刚,陈原林,等.南盘江盆地中北部三叠纪深水盆地古水流方向研究[J].沉积学报,2016,34(6):1120-1132.Peng Chengming,Wang Gang,Chen Yuanlin,et al.Triassic Paleocurrent Study in the Middle Northern Part of the Nanpanjiang Deep Basin[J].Acta Sedimentologica Sinica,2016,34(6):1120-1132.
[17]李向东,何幼斌,王丹,等.贺兰山以南中奥陶统香山群徐家圈组古水流分析[J].地质论评,2009,55(5):653-662.Li Xiangdong,He Youbin,Wang Dan,et al.Analysis on Palaeocurrent in the Xujiajuan Formation,Xiangshan Group,Middle Ordovician,in Southern Helan Mountains[J].Geological Review,2009,55(5):653-662.
[18]芦刚,林畅松,刘景彦,等.辽西凹陷沙河街组低凸起带物源分析[J].成都理工大学学报(自然科学版),2014,41(2):171-176.Lu Gang,Lin Changsong,Liu Jingyan,et al.Provenance Analysis of Low Uplift of Shahejie Formation,Liaoxi Sag,China[J].Journal of Chengdu University of Technology(Science and Technology Edition),2014,41(2):171-176.
[19]赵越,杨振宇,马醒华.东亚大地构造发展的重要转折[J].地质科学,1994,29(2):105-119.Zhao Yue,Yang Zhenyu,Ma Xinghua.Geotectonic Transition from Paleoasian System and Paleotethyan System to Paleopacific Active Continental Margin in Eastern Asia[J].Scientia Geologica Sinica,1994,29(2):105-119.
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