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.
出处
《沉积与特提斯地质》
CAS
CSCD
2008年第2期83-88,共6页
Sedimentary Geology and Tethyan Geology
基金
国家"十五"科技攻关项目(2001BA605A09)
中国石油化工股份有限公司科技攻关项目(P03036)
关键词
济阳坳陷
中生界
物源方向
沉积体系
Jiyang depression
Mesozoic
provenance
depositional system
