碳酸盐

Study on the geologic forecast s way tunnel of in karsts -geology;2. Study of the Characteristic of Bearing Capability of Pile Foundation in Karsts Area;3. Research conclusions:The karsts encountered in the construction can be divided into four types according to the engineering geological charac.

研究目的：宜万线是目前已建和在建工程中岩溶最为发育的铁路线，全线共有隧道159座，约占线路总长度的59%，其中多数隧道穿越碳酸盐岩地层，岩溶、岩溶水极其发育，这给隧道工程的安全施工以及工程建成后的运营安全造成十分重要的影响。

The compaction released water karsts are formed under the middle-deep buried surroundings are a process of the dissolution role between compaction released water contained organic acid and carbonate rock, are final production of karstification roles.

鄂尔多斯盆地的压释水岩溶是在中深埋藏条件下，富含有机酸的压释水渗入碳酸盐岩含水层所产生的溶蚀作用过程及岩溶化结果。

The results show that the organic matter in the dark limestones of the lower Cretaceous is of medium abundance, good type and proper maturity. The limestones have hydrocarbon-generating potential.

研究结果表明，该盆地下白垩统暗色碳酸盐岩的有机质丰度中等、类型较好、成熟度适中，具备了形成油气的条件。

The carbonate reservoir is characterized by the fact that the azimuth of fractures is related with structural axis, the developmental extent of fractures and structural location are close related to dip of structure, low-dipping structural axis has not growth fractures. Otherwise, growth fractures, density of fractures are related thickness of layer, more thickness, then less density of fractures. Intra-fracture of layer is main. Some marlstone and anhydrite barriers exist in the reservoir, and become some non-connected oil-water system.

结果表明：碳酸盐岩油藏为裂缝的发育程度与构造位置及构造倾角的大小有关，构造轴部倾角小裂缝不发育，构造翼部倾角大，裂缝发育；裂缝发育密度随着单层厚度增加而逐渐减小；裂缝以层内缝为主，穿层大裂缝少；油藏中存在若干泥质灰岩和膏盐的隔夹层，形成多个连通不畅的油水分布系统。

The chemistry of mine drainage can be affected by many factors, including the type and abundance of metal-bearing sulfides in ore and wall rock, and smelting process.

在碳酸盐岩地区的矿山环境中，由于其矿石类型、围岩类型以及选矿工艺的不同形成的矿山水体常呈中性，甚至碱性。

Algae and lichens may directly colonize and live on the surface of carbonate rocks. Through biochemical and physical processes, they bore and corrode the substrate, thus producing distinct biokarst microforms.

藻类、地衣可以直接殖居在碳酸盐岩表面，通过生物化学、生物物理过程对其基质产生钻孔溶蚀作用，并产生相应特征性的微形态。

Understanding the genetic origin of molar tooth structures is a crucial clue to the complicated Precambrian carbonate world.

理清臼齿构造成因问题是认识前寒武纪复杂的碳酸盐岩世界的重要线索。

The fact that molar tooth carbonates were concentrated in the period of Mid-and Neo-Proterozoic may reflect the only combination of favorable physical, chemical and biological conditions in the entire geological history.

臼齿碳酸盐岩在中新元古代集中发育的事实可能反映了有利的物理、化学和生物条件在地质历史上的唯一结合。

The core issue is how to construct a reasonable physical, chemical and microbial condition for early rapid precipitation and filling of molar tooth cracks in the subtidal shallow marine.

在综述臼齿碳酸盐岩成因研究历程和国内外最新研究成果的基础上，总结评述了6种主要的臼齿构造成因模式，其核心问题是在元古代正常潮下浅海环境中构建成岩作用早期臼齿构造裂缝形成及等粒微亮晶方解石快速沉淀充填的物理、化学及微生物条件。

Its rock types are more complicated, which include siliceous rocks、mudstones、clastic rocks、carbonate rocks and transitional rock types between them.

岩石类型也很复杂，包括硅质岩、泥岩、碎屑岩、碳酸盐岩及其过渡类型的岩石。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。