Are there any detailed descriptions of clay, mudstone and sandstone cores?
Clay (Ni n t, clay sand, sea): little sticky soil, moisture is not easy to get throughClay plasticity including kaolin, gismondite, very small particles (<2 m) silicate. A small amount of magnesium, iron, sodium, potassium and calcium in addition to aluminum.Clay is formed by weathering of silicate minerals on the earth's surface. But some diagenesis also produces clay. The appearance of clay in these processes may serve as an indication of diagenesis.Mudstone (Mudstone)
Sandstone: composed of quartz grains (sand), stable in structure, usually pale brown or red, mainly containing silicon, calcium, clay, and ferric oxide.Quartz, feldspar and other clastic components accounted for more than 50% of sedimentary clastic rock. Sandstone is formed by weathering, denudation and transport of rocks in source rocks. The rock consists of two parts: clastic and interstitial. In addition to quartz, feldspar, dolomite, heavy minerals, cuttings, etc.. The interstitial material comprises two components of the cement and the clastic complex. Common cements are siliceous and carbonate cements; the miscellaneous component is mainly a finer clay or silty sand that is deposited at the same time. The composition and structure of interstitial materials reflect the geological environment and physical and chemical conditions of sandstone formation. Sandstone can be divided into three categories: quartz sandstone, feldspar sandstone and lithic sandstone. Sand and sandstone are the main reservoirs of petroleum, natural gas and groundwater. Sand and sandstone can be used as abrasives, glass raw materials and building materials. Some of the occurrence of sand and sandstone is rich in gold, diamond, zircon, ILMENITE PLACER, Jin Hongshi etc..
A sedimentary rock composed of mud and clay that is similar in composition to shale but less brittle.A clay rock bedding or foliation is not obvious. The mineral composition is complex, mainly composed of clay minerals (such as water mica, kaolinite, montmorillonite), followed by detrital minerals (quartz, feldspar, mica etc.), epigenetic minerals (such as epidote, chlorite) and iron manganese and organic matter. The texture is soft and the degree of consolidation is weaker than that of the shale. Common types are: calcareous mudstone. With the amount of calcium carbonate, the common sedimentary rocks in the continental red rocks and marine, lagoon facies. Ferruginous mudstone. Containing more iron minerals, such as hematite, limonite, goethite, etc., more common in red rock. Siliceous mudstone. The content of SiO2 is high, and it contains no or very little iron and carbonate, and is often associated with iron rock, siliceous rock and manganese facies. The mudstone has the properties of water absorption, bond and fire resistance, and can be used for making brick, brick, ceramics and other industries.
