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条带灰岩是指毫米-厘米级薄板状灰岩与泥灰岩(页岩)互层岩相,正确认识条带灰岩的沉积与早期成岩特征对解释与之共生的竹叶状砾屑灰岩的成因具有重要的科学意义.通过大比例尺野外实测剖面以及多种实验室分析(岩石薄片观察与X-射线衍射等),本文将鲁西芙蓉统条带灰岩分为四类,即:灰岩-泥灰岩互层(L-M)、灰岩-页岩互层(L-S)、薄板状灰泥岩(Ltb)和纹理状灰岩-泥灰岩互层(Cl).条带灰岩通常沉积于潮下低能环境(一般在正常浪击面以下).在成岩过程早期,富含碳酸盐层与含粘土层具有差异胶结现象,这使得条带灰岩在压实、压溶作用及外力作用下发生变形,形成各种不同程度的变形构造,如裂缝构造、“香肠”构造.在外力(如风暴、地震等)的触发下,条带灰岩可能在埋藏的情况下由差异压实作用形成假竹叶状砾屑灰岩.
Limestone refers to the millimeter-centimeter thin plate-like limestone and marl (shale) interbedded lithofacies. Correct understanding of the sedimentary and early diagenetic characteristics of banded limestone is of great importance to the interpretation of the symbiotic bamboo- The origin of limestone has important scientific significance.Through large-scale field measured sections and a variety of laboratory analysis (rock sheet observation and X-ray diffraction, etc.), the article will be Lusi Huron belt limestone is divided into four categories, namely Limestone-marl interbed (LM), limestone-shale interbed (LS), lamellar limestone (Ltb) and texture limestone-marl interbedded layer (Cl) Usually deposited in the sub-tidal low-energy environment (usually below the normal surge surface). Early in the diagenesis process, the carbonate-rich and clay-bearing layers have a differential cementation which makes the compacted and autoclaved limestone And under the action of external force, it will be deformed to various degrees of deformation structure, such as fracture structure, sausage structure. Triggered by external forces (such as storms, earthquakes, etc.), the band limestone may be buried Fake bamboo-bearing conglomerate limestone formed by differential compaction.