利用天然粉石英制作耐高温硅酸钙保温材料的研究   总被引：9，自引：0，他引：9  

倪文  邹一民 《矿物岩石》1998,18(1):28-32

研究以天然粉石英为硅质原料,普通建筑用石灰为钙质原料生产硬硅钙石型硅酸钙保温材料的基本反应原理、反应过程和可用于工业化生产的工艺技术。用该项新技术所生产的硬硅钙石型硅酸钙保温材料,其性能达到美国和日本同类产品标准。  相似文献   

中国大陆地区沉积盆地热状况剖面   总被引：10，自引：0，他引：10  

邱楠生 《地球科学进展》1998,13(5):447-451

根据我国沉积盆地大量实测的地温、大地热流资料和岩石热物理性质数据,分析、总结了由东至西我国主要沉积盆地的现今地温、大地热流、深部地热及岩石圈热结构的分布状况及其差异,为我国的地热研究的进一步深入提供了可靠的基础资料。  相似文献   

Zonal Metamorphic Complex in the Tongulack Mountain Ridge, Altai, Russia, and Explanation of Its Origin with the Help of Thermal Modelling     

G.G.Lepezin  V.V.Reverdatto 《《地质学报》英文版》1998,72(1):51-64

A moderate pressure / high temperature zonal metamorphic complex in the Tongulack Mountain Ridge, Altai, Russia, is described, and the applicability of the models of magmatic intrusion and fluid flow to explanation of its origin discussed. The Precambrian complex was formed at 500-700℃ and 3.0-5.5 kbars; it is a linear, 25-30 km wide, thermal anticline with a curved axis showing symmetric metamorphic zoning. The metamorphism was isochemical by its nature, as is corroborated by the chemical compositions of the rocks. Four zones can be recognized within the metamorphic complex: chloritic (on the peripheries), cordieritic, sillimanitic and staurolite-out (in the centre). The zones are separated by successive isograds: cordierite, staurolite-in or sillimanite and staurolite-out. It is argued that the origin of the metamorphic zoning can be explained best by a combined fluid-magmatic model; conductive heat flow from the intrusion predominated considerably over the fluid flux in heat transfer: the fluid flow  相似文献   

Crystallinity and metamorphism of illite from Triassic strata in Henan County of Qinghai Province     

WANG Yi  YANG Xuejun  BAI Xianzhou  YE Chunlin  JIA Xiaochuan  XIONG Changli  HUANG Baixin  LUO Gai 《中国地质调查》2014,7(3):67-74

In order to verify the Triassic stratum metamorphism in this area, the crystallinity of illite in mudstone (shale) of Triassic stratum was analyzed and tested during the 1:50 000 regional mineral geological survey (I47E007023, I47E008023, I47E009023,1I47E009024)in Tuoyema area of Henan Mongolian Autonomous County in Qinghai Province. According to the experimental results of 30 samples, the crystallinity index of Triassic mudstone (shale) illite Kübler in Zongwulong-Zeku stratigraphic division in the north is 0.312-0.537, and the cell parameter b₀ is 0.898-0.903 2 nm. The metamorphic temperature is less than 350 ℃, with the grape-chlorite and zeolite facies. The crystallinity index of Triassic mudstone (shale) illite Kübler in the western inclined mountain stratigraphic division in the south is 0.21-0.318, and the b₀ value is 0.898 1-0.901 4 nm. The metamorphic temperature is mainly between 200 and 350 ℃, with the local temperature above 350 ℃ and grape-chlorite and greenschist facies. It is considered that the regional metamorphism grade in this area is very low or has no regional metamorphism. The metamorphism degree of the western dipping mountain stratum in the south is slightly higher than that of Zongwulong-Zeku stratum in the north. The measured metamorphic facies belts are not consistent with the previous thought, that is "regional low temperature dynamic metamorphism and low greenschist facies metamorphic belts", and the degree of metamorphism is relatively lower. It is confirmed that there is no large area regional metamorphism in the Triassic strata of Henan County in Qinghai Province, but only very low-level regional metamorphism.  相似文献   

Hydrochemical and isotopic characteristics of Chazi geothermal field in Shigatse in Tibet     

LUO Shaoqiang  XU Lin  TANG Hua  XIAO Jin  HU Lin 《中国地质调查》2014,7(5):10-15

Chazi geothermal field is located in Southwestern Tibetan Plateau. The geothermal potential has been ascertained by field survey and geothermal drilling. The hydrogeochemical characteristics and isotopic composition of this geothermal field show that the underground water belongs to HCO₃-Na. The difference of ion concentration between hot water and cold water shows that they have different material sources and certain hydraulic relations. The isotope analysis of δD and δ¹⁸O determines that the major source of the geothermal water in this area is meteoric water and water melt from the mountains snow and ice with the height above 5 652 m. The geothermal water was the result of the mixture of deep infiltrated meteoric water and deep-source fluid when they move along the fracture zone. The fracture zone is the main channel of hot spring and the reservoir of geothermal fluid. The migration retention time of the geothermal water in this geothermal field was at least 41 years. According to the calculated temperature of SiO₂ geothermometer, the geothermal temperature of the underground heat reservoir is about 148.18~153.49 ℃, and natural heat discharge is 2 264.33×10¹² J/a.  相似文献   

通化县四方山铁矿地质特征     

刘先权  高明珠  韩雪  车海龙  路猛  张庆连 《吉林地质》2014,(3):50-55

四方山铁矿经历了三期变形。第一期,当太古宙表壳岩形成后,来自东西向挤压作用,地层和矿体(S0)形成近南北向紧密褶皱构造。第二期,来自北西—南东方向挤压作用,使已经变形地层和矿体(S1)又一次变形,形成走向北东—南西叠加褶皱构造,这一期为四方山铁矿主期构造。第三期,来自北—西向和南东向不对称推力作用,使已经历二次变形地层、矿层均形成了S形,使S2又一次变形。  相似文献   

“岩浆热场”说及其成矿意义(上)   总被引：2，自引：0，他引：2  

张旗  金惟浚  李承东  焦守涛 《甘肃地质》2014,23(1):1-18

文中首先介绍了岩浆热场的沿革,指出"岩浆热场"并不是一个新概念,很早已出现在文献中了。常识告诉我们,炽热的岩浆侵位必定在周围形成一个热场,这就是岩浆热场。国外在19世纪晚期即对岩浆热场有比较深入的研究。罗文积和陈家清早在20世纪90年代(1997)就明确表述了对"岩浆热场"的认识,并给予精彩的阐述,他们是"岩浆热场"学说的先行者。文中简要介绍了地热场的概念,讨论了岩石的热力学性质、热传导形式、影响热流和地温分布的各种可能的因素。而"岩浆热场"指的是:在一个很短的时间内,在一个局部的地区出现的岩浆活动,使该区域地热梯度相对周边地区明显的上升,使之形成一个局部区域的热场。热场的规模很小,通常只离岩体几米或几公里。热异常和等温线是垂直分布的,叠加在地热场之上。并介绍了岩浆热场的基本特征。岩浆热场与地热场的热的来源不同,热的分布不同,地温梯度不同,热场规模不同,持续的时间不同,热与流体的关系不同以及研究方法不同等。岩浆热场说是建立在岩浆物理性质和岩浆动力学基础上的,它依赖于对岩浆的形成、侵位、冷却、固结及其对围岩的影响等知识的了解。牵涉到岩浆的温度、压力、黏度、密度、流变等基本问题。文中着重讨论了岩浆对围岩的热效应和岩浆热场中的流体等问题。岩浆热场最重要的意义是,它是流体赖以上升的通道。文中还概略讨论了流体和成矿流体来自哪里?流体是怎样上升的?热场中流体是怎样对流循环的?热液双向汇聚成矿理论等。  相似文献   

湖南扬子地区志留系龙马溪组页岩气成藏条件及前景评价     

李国亮  王先辉  杨俊  刘天一  罗鹏 《华南地质与矿产》2014,(3):285-292

湖南地处扬子陆块和华夏古陆过渡区,湘西北地区至雪峰山东南缘基本位于扬子地台,此区域属南方海相页岩气远景区。本文主要选取地质构造条件优越、页岩气特征较为明显的龙马溪组黑色页岩层作为主要研究对象。研究表明,龙马溪组黑色页岩分布面积广、有机碳含量高(TOC平均值为2.0%)、热演化程度高(Ro平均值为2.59%)、低孔低渗(孔隙度平均值为2.3%、渗透率小于0.04×10-3μm2);黑色页岩产出厚度在石门-桑植复向斜至龙山、来凤一带较厚,基本大于30 m。而其整体埋深范围在1000~2000m之间为主,产出较为平缓。总体认为,此套含气页岩有待进一步详细勘探和研究,也是十分有开发潜力的页岩气目标层。优选区集中在石门-桑植复向斜至雪峰山东南缘。  相似文献   

胶东大尹格庄超大型金矿床地质特征与成矿作用     

刘向东  杨真亮  徐韶辉  解天赐  王慧  曹智慧  孙雪飞 《地质论评》2024,70(S1):49-51

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大别山晓天—磨子潭断裂附近退变榴辉岩的厘定及其时代和大地构造意义     

刘琦  刘贻灿  杨阳 《地质论评》2024,70(S1):5-6

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