济阳坳陷中生代物源方向与沉积体系
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摘要
笔者利用砂岩和砾岩的百分含量,稳定矿物和不稳定矿物的含量变化特征及微量元素分布特征,分析济阳坳陷中生界物源方向。研究表明研究区中生界的主要物源来自西北侧和东南侧,内部的局部凸起仅提供部分碎屑物质。依据物源方向、岩心观察、测井及地震等资料对沉积体系进行了综合分析,研究区西北侧发育有冲积扇-辫状河-辫状河三角洲沉积体系,东南侧发育有冲积扇-曲流河(冲积平原)-三角洲沉积体系,内部主要发育有湖泊沉积体系,具有盆大、湖浅、坡缓及浅水型三角洲发育的特点。
Provenance analysis of the Mesozoic deposits in the Jiyang depression is based on sandstone and conglomerate contents,stable and unstable mineral contents and trace element distribution patterns.The principal source of the detritus lay to the northwest and southeast.The inner uplifts may provide only part of the detritus to the basin.The alluvial fan-braided stream-braided delta depositional system occurs in the northwest;the alluvial fan-meandering stream(alluvial plain)-delta depositional system appears in the southeast,and the lake depositional system is observed in the central part of the basin.The development of the Mesozoic basin is characterized by large basin,shallow lake,gentle slope and shallow-water delta.
Provenance analysis of the Mesozoic deposits in the Jiyang depression is based on sandstone and conglomerate contents,stable and unstable mineral contents and trace element distribution patterns.The principal source of the detritus lay to the northwest and southeast.The inner uplifts may provide only part of the detritus to the basin.The alluvial fan-braided stream-braided delta depositional system occurs in the northwest;the alluvial fan-meandering stream(alluvial plain)-delta depositional system appears in the southeast,and the lake depositional system is observed in the central part of the basin.The development of the Mesozoic basin is characterized by large basin,shallow lake,gentle slope and shallow-water delta.
引文
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[3]宗国洪,肖焕钦,李常宝,等.济阳坳陷构造演化及其大地构造意义[J].高校地质学报,1999,5(3):275-282.
[4]DUNKL I,GIULIO A D I,KUBLE M J.Combination of single-grain fission-track chronology and morphological analysis of detritalzircon crystals in provenance studies-sources of the MacignoFormation(Apennines,Italy)[J].Journal of SedimentaryResearch,2001,71(4):516-525.
[5]STEVENSON R K,WHITTAKER S,MOUNTJOY E W.Geo-chemical and Nd isotopic evidence for sedimentary-source changesin the Devonian miogeocline of the sourthern Canadian Cordillera[J].Geological Society of American Bulletin,2000,112(4):531-539.
[6]周祖翼,毛凤鸣,廖宗廷.裂变径迹年龄多成分分离技术及其在沉积盆地物源分析中的应用[J].沉积学报,2001,19(3):456-473.
[7]胡宗全,朱筱敏,彭勇民.准噶尔盆地西北缘车排子地区侏罗系物源及古水流分析[J].古地理学报,2001,3(3):49-54.
[8]宋凯,吕剑文,杜金良,等.鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系[J].古地理学报,2002,4(3):59-66.
[9]蒲玉国,吴时国,李道轩,等.东营凹陷高青砂岩体物源方向与沉积模式研究[J].地球学报,2005,26(2):145-150.
[10]COLOMBO F.Normal and reverse inroofing sequences insyntectonic conglomerates as evidence of progressive basinwarddeformation[J].Geology,1994,22(3):235-238.
[11]徐强,廖仕孟,朱永刚,等.川西龙门山前陆盆地中砂砾质楔形体的定量统计[J].沉积与特提斯地质,2000,20(4):31-37.
[12]MCLENNAN S M,TAYLOR S R.Sedimentary rocks and crustalevolution:tectonic setting and secular trands[J].Joural ofGeology,1991,99:1-21.
[13]MURRAY R W,BRINK MR,BRUMSACK HJ,et al.REE inJapan Sea sediments and diagenetic behavior of Ce/Ce*:Resultsfrom ODP Log 127[J].Geochim.Cosmochim.Acta,1991,55:2453-2466.
[14]MURRAY R W.Chemical criteria to identify the deposionalenvironment of chert:general principles and applications[J].Sedimentary Geology,1994,90:213-232.
[15]GIRTY G H.Provenance and deposional setting of Paleozoicchert and argillite,Sierra Nervada,California[J].Journal ofSedimentary Research,1996,66(1):107-118.
[16]杨守业,李从先,张家强.苏北滨海平原冰后期古地理演化与沉积物物源研究[J].古地理学报,2000,2(2):65-72.
[17]韩德亮.莱州湾E孔中更新世末期以来的地球化学特征[J].海洋学报,2001,23(2):79-85.
[18]杨守业,李从先,Jung Hoisoo,等.中韩河流沉积物微量元素地球化学研究[J].海洋地质与第四纪地质,2003,23(2):19-24.
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