CAJ | 학술논문

在1∶5万地质测量中,广西柳州地区石炭系鹿褰组与"寺门组"之间的地层曾被称为"黄金组",但其与典型地区的黄金组在岩性、岩相、古地理位置等方面均存在显著差异.根据新的研究与前人的资料综合分析,将柳州地区所谓的"黄金组"命名为一个新的组--北岸组.该组主要分布于广西中北部柳州市、柳江县、鹿寨县、柳城县、环江县等地,在古地理上位于黔南-桂中台槽的北缘.该组岩性以灰-深灰色薄-厚层生物碎屑粉晶灰岩、含生物碎屑泥晶灰岩为主,夹硅质岩、泥岩和砂岩,可划分为3个沉积旋回,属斜坡-盆地相沉积.下伏鹿寨组,上覆新圩组,均为整合接触.时代为石炭纪维宪期晚期-谢尔普霍夫期.
재1∶5만지질측량중,엄서류주지구석탄계록건조여"사문조"지간적지층증피칭위"황금조",단기여전형지구적황금조재암성、암상、고지리위치등방면균존재현저차이.근거신적연구여전인적자료종합분석,장류주지구소위적"황금조"명명위일개신적조--북안조.해조주요분포우엄서중북부류주시、류강현、록채현、류성현、배강현등지,재고지리상위우검남-계중태조적북연.해조암성이회-심회색박-후층생물쇄설분정회암、함생물쇄설니정회암위주,협규질암、니암화사암,가화분위3개침적선회,속사파-분지상침적.하복록채조,상복신우조,균위정합접촉.시대위석탄기유헌기만기-사이보곽부기.
Around the Liuzhou area of Guangxi, China, the so-called "Huangjin Formation" refers to the strata between Carboniferous Luzhai Formation and "Simen Formation", while they are remarkably different to the typical Huangjin Formation in the type area in terms of lithology, lithofacies and paleo-geographic position. Based on our study as well as published literature, Bei′an Formation, a new lithologic unit is established to denote the sediments that were assigned to the "Huangjin" Formation. This Bei′an Formation is widely exposed in the areas of Liuzhou, Liujiang, Luzhai, Liucheng, Huanjiang in northern and central Guangxi. The Bei′an Formation represents a succession of basin and slope sediments, and mainly comprises gray or dark gray, thin to thick-bedded packed biomicrites and fossiliferous biomicrites, with intercalations of siliceous rocks, mudstones and sandstones, it can be subdivide into three sedi-mentary cycles. Underlying strata are Luzhai Formation and they underly below Xinyu Formation with conformity contact. Besides, their age is late Visean to Serpukhovian.