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- In this paper, the straticulate dolostone and spatulate dolostone in Lower Ordovician strata of Well Tazhong 1 were studied using petrologic and geochemical methods. 本文选择塔中地区塔中1井下奥陶统藻纹层白云岩与夹层竹叶状白云岩作为对象,应用岩石学与地球化学方法对其成因问题进行了研究。
- Therefore, the straticulate dolostone and spatulate dolostones were rapidly formed by direct precipitation from vaporized seawater in tidal platform. 因此，塔里木盆地塔中1井钻遇的下奥陶统藻纹层白云岩与夹层竹叶状白云岩为潮坪环境下，从蒸发海水中快速沉积形成的。
- straticulate dolostone 藻纹层白云岩
- Dolostone is the main rock type of the Cambrian in this area. 从下寒武统石龙洞组开始都是白云岩沈积。
- Gypsiferous mi-crocrystal dolostone and dolarenite formed by seepage-reflux ... 进行了白云石化分区分带研究,为下步勘探部署指明了方向。
- Carbonate rocks are predominantly composed of intra-clastic dolostone, chert dolostone and sand-bearing dolostone. 碳酸盐岩以内碎屑白云岩、燧石白云儿和含砂白云岩为主。
- Crystalline dolostone is formed by seepage-reflux dolomitization and burial dolomitization. 晶粒白云岩有两种成因：一为回流渗透白云石化；二为深埋藏白云石化。
- The dolostone includes sparry dolostone, residual-grained dolostone, residual limy dolostone and algae dolostone. 其中的白云岩主要包括结晶白云岩、残余颗粒白云岩、残余灰质白云岩和隐藻白云岩等类型。
- Grain dolostone is formed in the deep burial dolomitic environment by mixing-water dolomitization. 颗粒白云岩的形成与混合水白云石化作用和深埋藏成岩作用有关；
- There is a series of strata composed of dolomitite, calcareous dolostone and quartzose sandstone. 大青山地区发育一套以白云岩、灰质白云岩和少量石英砂岩为主的地层。
- The reef dolostone is formed in mixed water which is mainly controlled by frequent change of the sea level. 礁白云岩具有典型的混合带白云石化特点，受海平面频繁变化影响；
- The slumping event deposits were mainly breccia dolostone (limestone) while the turbidity current event deposits were turbidity grain limestone (dolostone). 其中滑塌事件的沉积产物主要为滑塌角砾白云岩（石灰岩），浊流事件的沉积产物主要为浊积颗粒石灰岩（白云岩）。
- According to whether remnant grains exist, post-penecontemporaneous dolostone can be divided into remnant grain dolostone and crystalline dolostone. 准同生后白云岩根据残馀颗粒的有无可分为残馀颗粒白云岩和晶粒白云岩两大类。
- Based on above, through analysing the porosity of the dolostone, the results show that the dolostone bed is a good reservoir bed. 在沉积期后变化中经历了多种成岩作用改造,其中影响白云岩储集性的作用主要为溶蚀作用、重结晶作用和构造应力作用。
- According to the mechanism of dolomitization, it can be divided into penecontemporaneous dolostone and post-penecontemporaneous dolostone. 白云岩可据白云石化作用的机理和时间分为准同生白云岩和准同生后白云岩两大类。
- Every dolostone type can be differentiated from the others by its special crystal structure and or sedimentary structures. 每类白云岩都可以其独具特色的晶体结构和／或沉积构造与其他类型相区分。
- In the same conditions of temperature, pressure and specific surface area, the start-up dissolution velocity of limestone sample is more than the dolostone's one. 在相同温压、相同比表面积的条件下，灰岩类岩石样品的启动溶蚀速率大于白云岩类岩石样品的启动溶蚀速率。
- Micritic dolostone occurs widely in the Middle and Upper Cambrian and is yellowish brown and brickcolored red, in which parallel laminae, bird's-eyes and mud-cracks are developed. 准同生白云岩广泛出现于中上寒武统，岩石呈土黄色、砖红色，具纹层、乌眼、乾裂构造。
- It follows that diagenesis may be of great importance to the recognition of sequence boundaries and types in the dolostone strata and to the division of systems tracts. 成岩作用研究在白云岩地层中对层序边界及其类型的识别、体系域的划分具有重要的意义。
- The dolostone that occupies 20% volume of sedimentary rock in the earth's crust is one of the most important carbonatereservoirs for oil and gas accumulation. 白云岩占地壳沉积岩体积的20%25,是碳酸盐岩地层中最主要的油气储渗体。
