LITHOFACIES AND SEDIMENTARY ENVIRONMENTS OF LATE SINIAN DENGYING FORMATION AT YANGJIAPING IN SHIMEN, HUNAN

Zhu Zhongde; Hu Mingyi; Luo Liuxin; Xiao Chuantao; Li Xiangming; Guo Chengxian; Hu Aimei

doi:10.11743/ogg19930401

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LITHOFACIES AND SEDIMENTARY ENVIRONMENTS OF LATE SINIAN DENGYING FORMATION AT YANGJIAPING IN SHIMEN, HUNAN
Vol. 14, Issue 4, Pages: 261-271(1993)
Online First：25 December 1993，

Published：1993
DOI： 10.11743/ogg19930401
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DOI：

Zhu Zhongde, Hu Mingyi, Luo Liuxin, et al. LITHOFACIES AND SEDIMENTARY ENVIRONMENTS OF LATE SINIAN DENGYING FORMATION AT YANGJIAPING IN SHIMEN, HUNAN[J]. 1993, 14(4): 261-271. DOI： 10.11743/ogg19930401.

摘要

中扬子台地西南缘杨家坪灯影组

可划分为流水成因颗粒岩(G

—G

)、流水生物化学成因藻白云岩(A

—A

)、生物化学成因叠层石粘结岩(S

—S

)、复成因泥晶白云岩及泥岩(M

—M

)、与重力成因有关的滑积岩(B

—B

)、重力流成因的浊积岩等6大类21种岩相。形成潮上-潮间坪上部组合、潮间坪下部组合、潮下组合、滩礁组合、台地前缘斜坡组合、盆地边缘组合。从下向上有规律地形成了三个岩相序列:台地岩相序列属潮坪沉积环境;台地边缘岩相序列属上、下斜坡和浅海陆棚岩相序列。构成一个海侵推进层序。

Abstract

A series of dolomites developed in the Dengying Formation at Yangjiaping on the southwest margin of middle Yangzi Platform.The dolomites can be classified into six groups:water current genetic grainstone(G

-G

);water current biochemical genetic algal dolostone(A

-A

);biochemical genetic stromatolithic boundstone(S

-S

);polygenetic micritic dolostone and mud rock(M

-M

);slump rock(B

-B

)related to gravity genesis and turbidite of gravity flow genesis and six kinds of lithofacies associations:supratidal-upper part of intertidal flat;lower part of intertidal flat;subtidal;bank-reef;platform foreslope and basin-margin associations.They constitute three sequences from lower to upper:platform sequence formed in tidal flat environment;platform marginal sequence formed on slope and basin-margin sequence

these lithofacies sequences constitute a com-plete transgression sequence.