大地构造与成矿学
大地構造與成礦學
대지구조여성광학
GETECTONICA ET METALLOGENIA
2001年
2期
217-224
,共8页
元古界%泠家溪群%沧水铺群%林家湾组%银珠坝组%板溪群%岩石地层序列
元古界%泠傢溪群%滄水鋪群%林傢灣組%銀珠壩組%闆溪群%巖石地層序列
원고계%령가계군%창수포군%림가만조%은주패조%판계군%암석지층서렬
本文通过介绍沧水铺群创建和演绎的过程以及因其被演替后所面临的岩石地层学问题,认为《湖南省岩石地层》( 1997)中,新元古界底部——冷家溪群与板溪群马底绎组之间——的宝林冲组火山岩→横路冲组砾岩序列是主观虚拟的,沧水铺群林家湾组砾岩→银珠坝组火山岩序列是客观存在不容置疑替代的,并从砾石成分、变质特征、地质剖面、区域分布、专家检验以及钻探地质工程难验证等方面予以论证。
本文通過介紹滄水鋪群創建和縯繹的過程以及因其被縯替後所麵臨的巖石地層學問題,認為《湖南省巖石地層》( 1997)中,新元古界底部——冷傢溪群與闆溪群馬底繹組之間——的寶林遲組火山巖→橫路遲組礫巖序列是主觀虛擬的,滄水鋪群林傢灣組礫巖→銀珠壩組火山巖序列是客觀存在不容置疑替代的,併從礫石成分、變質特徵、地質剖麵、區域分佈、專傢檢驗以及鑽探地質工程難驗證等方麵予以論證。
본문통과개소창수포군창건화연역적과정이급인기피연체후소면림적암석지층학문제,인위《호남성암석지층》( 1997)중,신원고계저부——랭가계군여판계군마저역조지간——적보림충조화산암→횡로충조력암서렬시주관허의적,창수포군림가만조력암→은주패조화산암서렬시객관존재불용치의체대적,병종력석성분、변질특정、지질부면、구역분포、전가검험이급찬탐지질공정난험증등방면여이론증。
A unique lithostratigraphic unit occurring discordantly between the Banxi and Lengjiaxi Groups at Yiyang County,Hunan Province,China,was first discovered in 1977 by Pan Chuanchu et
al.This unit was named Cangshuipu Group,and its lower conglomerate Lingjiawan formation,the upper pyroclastic rocks Yinzhuba Formation.
In 1988,Luo Haiyan proposed that the Baolinchong Formation,attributed to the Lengjiaxi Group,must be denominated in order to replace the Cangshuipu Group because he considered that the bed successions of the Cangshuipu Group was upended.
In 1995,Tang Xiaoshan renamed the conglomerate unit Hengluchong Formation of the Banxi Group instead of the Lingjiawan Formation of the Cangshuipu Group.
Dealing with the conglomerate and the pyroclastic rocks unit at Cangshuipu,Hunan,《 The Lithostratigraphy of Hunan Province》 (1997) not only did not introduce the evolution of denomination of the strata and did not wonder if the bed successions of the Baolinchong Formation is right or upset,but also did not mention any information about the Cangshuipu Group.
As a result ,there occur a few principle problems on denominating,dividing and correlating of Hunan Proterozoic strata on lithostratigraphy.
The author demonstrats the bed successions of the Cangshuipu Group is right,but the bed successions of Baolinchong Formation is upset with data on the conglomerate component, metamorphic feature,section geology,regional geology and drilling holes as well as experts examination from the Cangshuipu region.