Lithofacies and Sedimentary Facies from Middle Triassic Fluvial Deposits of Youfangzhuang Formation,Jiyuan Area,Western Henan
Lithofacies and Sedimentary Facies from Middle Triassic Fluvial Deposits of Youfangzhuang Formation,Jiyuan Area,Western Henan
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发表时间：
2009
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通讯作者：
Zheng Wei
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作者：
Zheng Wei
豫西济源地区中三叠统右方庄组保存的曲流河相沉积，主要为细砂岩、粉砂岩和粉质泥岩夹杂砾岩和粗砂岩。根据Miall的岩相分类，油方庄组可识别出17个岩相，主要岩相为Sts、Sps、SWs、Fh、Fr、Fc、CH和Cr，可划分为7个岩相组合。根据岩相类型和沉积构造特征，确定了油方掌组河流相沉积。可细分为三个亚岩相和八个微岩相。河道弯曲度(P)为0.64，属于低弯度曲流河沉积。
The meandering fluvial deposits,preserved in Middle Triassic Youfangzhuang Formation of Jiyuan Area,western Henan,comprise mainly fine sandstone,siltstone and silty mudstone interbedded with conglomerate and coarse sandstone. According to Miall's lithofacies classification,seventeen lithofacies can be recognized from Youfangzhuang Formation,the main lithofacies are Sts,Sps,Sws,Fh,Fr,Fc,Ch and Cr,which can be aligned to seven lithofacies associations. Based on the features of lithofacies types and sedimentary structures,the fluvial sedimentary facies of Youfangzhang Fm. can be subdivided into three sublithofacies and eight microlitofacies. The fluvial channel sinuosity(P) is 0.64,the fluvial deposits belong to low-sinuosity meandering fluvial deposits.