The main water source is fracture-karst water in Middle Ordovician carbonate rocks.
主要的供水水源为中奥陶统碳酸盐类岩石中的裂隙-喀斯特水。
Karst water from Middle Ordovician limestone can induce the most dangerous water hazards menacing mine safety.
中奥陶统灰岩岩溶水对煤矿安全威胁最大。
There are two important manganese carbonate horizons in the Middle Ordovician and Early Sinian strata in central Hunan Province.
湘中地区有中奥陶世和早震旦世两个重要的锰碳酸盐层。
That a: The Mn-deposits of Middle Ordovician Epoch in central Hunan were high grade Mn-ores with low-P, low-Fe and high basicity;
提出：①湘中地区中奥陶世锰矿是低磷、低铁、高碱度优质锰矿石；
The Guozhuang Spring exposed in the Middle Ordovician limestone is one of complete-drainage and of erosion structure of ascending type.
郭庄泉为一全排型、侵蚀—构造上升泉，出露于中奥陶纪灰岩中。
Trace fossils from the Middle Ordovician Lashizhong Formation in Zhuozishan, the northwest margin of Ordos Basin are studied systematically.
首次对鄂尔多斯盆地西北缘桌子山地区中奥陶世拉什仲组的遗迹化石进行了系统研究。
The material source of the Carboniferous karst type bauxite in North China mainly came from the underlying Late cambrian-middle Ordovician carbonate rock.
华北石炭纪岩溶型铝土矿的主要物质来源为下伏的晚寒武世—中奥陶世碳酸盐岩。
The reservoirs in Baota Formation of Middle Ordovician in South Sichuan are characterized by low porosity and low permeability and belong to a fractured type.
川南地区中奥陶统宝塔组储层具低孔低渗特征，属裂缝性储集类型。
Yijianfang formation of Middle Ordovician sedimentary period is the open platform of regional seawater shoaling with platform-inter-shallow patch reef sedimentary.
中奥陶统一间房组沉积时期为区域性的海水变浅的开阔台地台内浅滩夹点礁沉积。
From the suture line towards the north, an andesite line along Sharburti Mountain was the volcanic island arc developed from middle Ordovician to middle-late Silurian.
由缝合线向北，沙尔布尔提山安山岩线是中奥陶世至中、晚志留世发育起来的火山岛弧。
The Middle Ordovician submarine spilite-alkaline volcanic rock association in the Shihuigou area in the Northern Qilian mountains was the product of island arc volcanism.
北祁连山石灰沟地区发育一套完整的奥陶纪岛弧火山岩系。
In early Ordovician North Qilian region again stretched and suffered second oceanization, up to middle Ordovician a mature ocean basin with a trough-arc-basin system already formed.
早奥陶世北祁连地区再次拉张，遭受第二次大洋化，到中奥陶世形成具沟弧盆体系的成熟大洋。
The characteristics of high resolution carbonate cycles in a sequence composed of platform and basin in the middle part of Ordovician in the North Tarim basin have been studied.
深入研究了塔里木盆地北部奥陶系中部一段台地—盆地相序列中的高分辨率碳酸盐岩旋回的特征。
The study of reservoir bitumen showed that the source is not only the carbonate in middle and late ordovician, but also the carbonate in Cambrian.
储层沥青研究表明烃源岩不仅仅只有中上奥陶系烃源岩，还有寒武系烃源岩。
The synthetical studies show the reservoir of the area beneath Salt of middle-lower Ordovician is bad than the north area of the early Hercynian rock-solution development.
综合分析结果表明，盐下地区中下奥陶统储层稍劣于北部海西期岩溶发育地区。
There were various trap types developed in the Middle Upper Ordovician, including sedimentary type, reef type and structure controlled sedimentary type.
中上奥陶统圈闭发育多种类型，有成岩型圈闭、礁型圈闭和受构造作用控制的成岩型圈闭。
Organic reef formation and development rely on very unique environment, but original sedimentary environment in middle to late Ordovician in Tarim was destroyed completely due to structure eroded.
生物礁生存和发育有着严格的生存环境，但由于构造剥蚀作用，造成塔里木盆地中晚奥陶世原始沉积环境破坏殆尽。
This is the first time in the study and mapping of the Middle and Late Ordovician in South China.
这种定量的岩相古地理图在我国南方中及晚奥陶世还是首次出现。
This discovery changed the sole knowledge of structural feature in Tazhong area and aroused new knowledge of Middle-Late Ordovician structural anticlines background in Tarim basin.
这一发现改变了对塔中地区构造特征的单一认识，启发了对塔里木盆地中晚奥陶世构造背景的新认识。
Comprehensive researches have concluded that the Heishan ophiolite was formed in Nanhua Ordovician period and its structural location in Silurian period early Middle Devonian epoch.
综合研究得出黑山蛇绿岩形成于南华—奥陶纪，构造就位于志留纪—早中泥盆世。
The two karst developing periods for the Middle and Upper Ordovician in the Lunnan area are consistent with two transgressions of the Carboniferous.
轮南地区发育的两期岩溶与石炭纪两次较大的海侵时间相一致。
The correlation between oil and source proved that the preserved commercial oil reservoirs of Marine origin in the Tarim basin are mainly generated from the marl of the Middle Upper Ordovician.
油源对比证实：盆地目前保存下来的海相成因工业性油藏，主要来源于中上奥陶统泥灰岩。
This method has been applied in the Ordovician carbonate reservoir located in the middle of the Tarim Basin of China with good results.
通过在塔里木盆地奥陶系碳酸盐岩地层中的应用表明，该方法具有较好的应用效果。
Vertically, 3sets of source rocks including the Lower Cambrian, the Middle-o-Upper Ordovician-Lower Silurian and the Permian were developed in Chinese Paleozoic Marine basins.
研究认为中国古生代海相盆地在纵向上主要发育下寒武统、中上奥陶统—下志留统和二叠系3套烃源岩。
The asphaltene RICO indicates that the Middle and Upper Ordovician may be the main source rocks of the oils in Lunnan, Tahe and Hadexun Oilfields.
沥青质的RICO研究结果表明，中、上奥陶统烃源岩为轮南、塔河、哈得逊原油的主力烃源岩。
The asphaltene RICO indicates that the Middle and Upper Ordovician may be the main source rocks of the oils in Lunnan, Tahe and Hadexun Oilfields.
沥青质的RICO研究结果表明，中、上奥陶统烃源岩为轮南、塔河、哈得逊原油的主力烃源岩。
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