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焦家断裂带、三山岛断裂带是胶西北区著名的金矿成矿带,控矿成因类型属典型的"焦家式"蚀变岩型金矿。近年来,该两大成矿带在勘查研究及深部找矿探索方面取得了一系列重大突破,其埋藏深、规模大,充分显示出其深部找矿的巨大潜力,浅部的常规物探方法模型已经建立,但常规物探在深部找矿中的难度越来越大,至今仍没有总结出一套适合深部蚀变岩型金矿地质—地球物理模型的有效物探方法,鉴于此,该文通过在深部找矿中应用较好的新技术新方法的一致性探讨,并结合成矿地质特征及钻孔资料,分析建立"焦家式"蚀变岩型深部金矿地质—地球物理模型。 相似文献
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湘南地质勘察院 《国土资源导刊(湖南)》2020,17(2):封2,封3-封4
正"钦杭成矿带湘南段铜锡多金属矿产深部探测技术示范"项目隶属2018年国家重点研发计划"深地资源勘查开采"专项,项目工作周期为3年,总经费3036万元,由中南大学牵头,中国地科院、湘南地质勘察院、昆明理工大学等单位联合承担。项目研究内容及总体目标是:完善华南钦杭成矿带湘南段铜、锡多金属成矿系统的复合成矿模式;集成创新深部铜锡多金属矿探测技术方法组合;圈定铜锡多金属深 相似文献
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<正>"广西大瑶山成矿带西段金矿暨湾岛矿区找矿研讨会"传出令人振奋的消息:继广西贺州市昭平县湾岛寻找金矿取得重大成果之后,中国冶金地质总局将继续向矿区的边部和深部进军,在大瑶山成矿带发起向探明50吨黄金资源量的新冲刺! 相似文献
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为加强豫西南重要成矿带深部找矿工作,探索新的产学研地质找矿联动机制,近日,河南省地质调查院联合中国地质大学(北京)、栾川县地质矿产局等单位在洛阳市栾川地区建立"栾川矿产资源与地质环境产学研基地"。 相似文献
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<正>城市化使得城市土地资源日益紧张,有效开发和利用地下空间成为大势所趋。在去年5月份召开的全国科技创新大会上,习近平总书记明确提出,向地球深部进军是我们迫切需要解决的战略科技问题。而国土资源部提出的科技创新"三深一土"战略,则让"向地球深部战略"实施进入快车道。其实近年来,上海、成都、武汉等城市已经开始立体空间发展的探索和实践,取得了不少实绩。但大部分城市在地下空间利用的规划、法规、管理、技术等方面都还处在起步阶段,如何解决地下空间的安 相似文献
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山东省莱州市招贤金矿区矿体特征与找矿前景 总被引：1，自引：0，他引：1
近年来,焦家金成矿带深部找矿取得重大突破。山东省地质调查院在莱州招贤地区,对焦家带深部(赋存标高-1 260m~-2 170m)开展找矿工作,圈定金矿体27个。矿体受焦家断裂的破碎蚀变岩带控制,主要赋存于黄铁绢英岩化碎裂岩及花岗质碎裂岩带内,其中规模达第Ⅰ勘查类型的矿体3个。提交金矿(333+334?)金金属量105t,另有低品位金金属量近50t。该文对焦家带深部金矿体矿体特征、赋存情况等进行研究,发现矿区内主矿体向深部尚未封闭,尤其是72~88线、288~320线,矿体向深部有厚度变大,品位增高的趋势,且在320线深部矿体中发现了自然金,显示了焦家成矿带深部具有良好的找矿远景,为打造胶东深部找矿示范区提供重要参考。 相似文献
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焦家成矿带自被发现以来,一直备受关注,现矿体控制深度已超-2 000 m,至今探明金资源储量已超千吨。焦家成矿带为热液型金矿床成矿带,具有明显的蚀变分带现象,通常根据其蚀变分带特征对矿体群进行划分,将下盘蚀变带最外层的黄铁绢英岩化花岗岩带中的矿体划为Ⅲ号矿体群。以往对-1 000 m以上矿体的矿体特征及成因也做了较为详细的总结和剖析,但其深部Ⅲ号矿体群的研究资料较少。该文搜集焦家成矿带中段各矿床的勘查化验资料,针对焦家成矿带浅部、中部及深部的Ⅲ号矿体群的产出状态、矿化类型进行对比研究,分析其矿床成因,根据其宏观和微观特性加上化验结果,结合区内构造等因素对其矿体成因进行浅析,对深部Ⅲ号矿体群产出状态进行推测,指出Ⅲ号矿体群的富集规律及其成矿集中期。认为深部Ⅲ号矿体群内含矿裂隙倾角集中在40°~69°、80°~90°,并且存在大量与主矿体倾向相同或相反的陡倾矿体。黄铁绢英岩化花岗岩带蚀变相对较弱,其矿化以网脉状、细脉状、脉状及团块状为主。 相似文献
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《地球科学与环境学报》2016,(3)
巴尔喀什—准噶尔成矿带主要由巴尔喀什成矿带、西准噶尔成矿带和东准噶尔成矿带组成,是中亚成矿域西部重要的晚古生代成矿带。巴尔喀什—准噶尔成矿带产出有大量著名的大型—超大型斑岩型铜钼矿床(科翁腊德、阿克斗卡、博尔雷和包古图)、大型矽卡岩型铜矿床(萨亚克)、大型稀有金属矿床(东科翁腊德、扎涅特和阿克沙套)和大型造山带型金矿床(哈图)等。锆石U-Pb测年,辉钼矿Re-Os测年,角闪石、白云母、黑云母和钾长石40 Ar/39 Ar热年代学,锆石和磷灰石裂变径迹、(U-Th)/He测年和热历史模拟,限定了金属矿床从深部形成到地表剥露的全过程热演化历史。热年代学研究揭示该地区晚古生代与岛弧/大陆弧有关的深成岩浆侵入活动和同时代的金属成矿作用、晚古生代—早中生代的中温区域冷却历史以及中生代以来金属矿床的剥露作用。综合花岗岩类地球化学和年代学研究结果,该地区经历了从晚石炭世大洋板块的俯冲到早二叠世陆内伸展作用的构造环境转换;在此构造转换时期,发生了金属铜、钼、稀有金属和金成矿作用的大爆发,可称之为中亚成矿域西部"晚古生代成矿作用大爆发"。矽卡岩型铜矿、斑岩型铜(钼)矿、云英岩-石英脉型钼钨矿和造山带(石英脉)型金矿构成了巴尔喀什—准噶尔成矿带晚古生代成矿作用大爆发完整的区域成矿系列。 相似文献
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在网上各种信息呈现爆炸式增长的背景下,传统方法往往难以顾及用户兴趣,而导致查询无法体现个性化。针对这一问题提出一种基于用户历史瓦片浏览记录的兴趣点智能搜索方法。首先对智慧城市平台下的用户历史瓦片浏览记录数据进行分析,并以热力图可视化形式展现出用户关注的热点区域,得出空间热度;然后根据属性查询中加入空间热度影响因子来影响兴趣点搜索结果,使搜索结果更加符合用户搜索意图,针对热点区域给不同用户以相应服务;以滕州市兴趣点为实验数据,使用Elasticsearch构建索引数据库,采用Web前端技术搭建搜索框架,经过实验对比分析发现,该方法能够有效地提高搜索的查准率,并且可随着数据量的丰富变得更加智能化。 相似文献
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【目的】探讨放养鱼类对乌梁素海水生态的影响。【方法】2017年7月-2018年4月共设置6个采样点,分别对乌梁素海现存水草区与鱼类放养区水体表层浮游植物进行调查分析,并对两区域的营养状态与水质状况进行分析评价。【结果】调查共鉴定出浮游植物8门76属154种,其中现存水草区(142种)多于鱼类放养区(88种),现存水草区浮游植物种属组成为硅藻-绿藻-蓝藻型,鱼类放养区为绿藻-硅藻-蓝藻型。现存水草区平均多样性指数(H′)、丰富度指数(D)分别为4.29、4.23,明显高于鱼类放养区(2.46、2.30)。两区域浮游植物优势种共26种,其中现存水草区(24种)多于鱼类放养区(11种),现存水草区以蓝藻、绿藻、硅藻为主要优势种,而鱼类放养区则以蓝藻为绝对优势种。浮游植物平均密度现存水草区(25.19×106 cell/L)显著低于鱼类放养区(275.79×106 cell/L)(P <0.05),而平均生物量现存水草区(13.34 mg/L)虽低于鱼类放养区(36.20 mg/L),但差异不显著(P> 0.05)。研究显示,现存水草区营养状态为中营养-轻度富营养,鱼类放养区为中度富营养-重度富营养;两区域水质均为中度污染到重度污染状态。【结论】与历史数据相比,现存水草区浮游植物群落表现为浮游植物多样性下降、种类小型化、优势种转变为蓝藻为主。与现存水草区相比,鱼类放养区浮游植物群落因放养鲢、鳙的摄食导致浮游植物多样性下降、种类小型化、优势种向可食性差、生长快的群体型蓝藻演替。 相似文献
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As a National Basic Research Program (973 Program) of China, the Key Processes, Mechanism and Ecological Consequences of Jellyfish Bloom in China Coastal Waters led by Prof.SUN Song
from Institute of Oceanology, Chinese Academy of Sciences (IOCAS) was endorsed by the Ministry of Science and Technology.Recently, the kick-off meeting of this five-year (2011-2015)
program was held on January 15-16 in Qingdao,China.More than 120 participants attended the meeting. 相似文献
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The paper, taking Songliao Plain for example, studied the concept, distribution law and formation mechanism of inland saline-alkaline
wetland. The inland saline-alkaline wetland is distributed over the inland region of arid or semi-arid climate; it is the
wet or slightly stagnant environment, forming saline-alkaline soil and salt vegetation and making the geogra phical environment
fonming complex with an ecosystem of saline-alkaline wetland. The laws of zone nature and non-zone nature control the distribution
of the inland saline-alkaline wetland that extensively spreads in north part of China and other countries. The inland saline-alkaline
wetland is formed jointly by atmosphere, hydrosphere, lithosphere and biosphere including intellectual sphere. Under the special
condition, the artificial activity is possibly the key function. In order to improve the human environment, it is a great
duty confronting the whole world to rationally transform the inland saline-alkaline wetland. Therefore, we presented an anti-inland
theory to promote the environment transformation.
Foundation item: Under the auspices of the project of the Chinese Academy of Sciences (KN95 — 02).
Biography: SUN Guang-you(1940 — ), male, a native of Harbin, professor. His research interests include geography, wetland. 相似文献
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A SYSTEM DYNAMICS APPROACH FOR SUSTAINABLE DEVELOPMENT IN THE MIYUN RESERVOIR AREA，CHINA 总被引：2，自引：0，他引：2
Miyun Reservoir was designated as the water source of Beijing City in 1982.Since that time ,so-cio-economic development in Miyun Area has been slowing due to the restriction of severe environmental standards.More and more attention from the public and government has been paid to the regional sustainable development.And an effect-tive planning for the local society management system is urgently desired.In this study,a regional sustainable develop-ment system dynamics model,named MiyunSD, is developed for supporting this planning task.MiyunSDconsists of dynamo-ic simulation models that explicitly consider information feedback that governs interactions in the system.Such models are capable of simulating the systemˊs behavior and predicting its developing situation of the future.For the study case,interact-tions among a number of system components within a time frame of fifteen years are examined dynamically.Three plan-ning altermatives are carefully considered.The base run is based on an assumption that the existing pattern of human active-ties will prevail in the entire planning horizon,and the other altermatives are based on previous and present planning stud-ies.The different alternatives will get different systemˊs environmental and socio-economic results.Through analyzing these dynamic results,local authorities may find an optimal way to realize the objectives that the regional environment will be well protected and at the same time the economy will be rapidly developed. 相似文献
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Gen-nian Sun 《中国地理科学(英文版)》2000,10(3):231-237
Modern inbound tourism in China has been developing for 20 years, a trend line of inbound tourists in statistical data began
to show. This paper introduces the concept of tourism background trend line, and explores its two functions as a barometer
in demonstrating fluctuation in the tourism economy and as a forecaster in forecasting tourism development. The tourism background
trend line is a new concept, the word “background” derived from environment science, refers to the “trend line” which reflects
the dynamic curve or dynamic equation of tourism development without considering the impact of unexpected incidents. The introduction
of this concept was inspired by Karl Marx’s comments on the relation between value and price. Tourism background trend line
reflects the summary of multiple factors involving tourism resources, tourism demand, population growth, the scale and speed
of economic development, and the spatial interaction between tourism origins and destimations. It demonstrates the natural
and stable trend and the temporal law of tourism development in a country or region. The tourism statistical curve is at random,
susceptible to disruptions and disturbances from serious political, economic and environmental happenings, but it always fluctuates
around the background line. Tourism background line can reveal the potential of a country’s tourism development. Compared
with the statistical line, it can be used as a “barometer” indicating ups and downs of tourism industry in the past. When
naturally extended, the background trend line also can be used for forecasting the trend of tourism development in future.
In this paper, 4 tourism background trend lines of China’s inbound tourists, i. e. foreign tourists, Hong Kong/Macao/Taiwan
tourists, overseas Chinese tourists and total tourists from abroad, were established with statistical data from 1978 to 1996.
And the impacts of the Political Event in 1989 (or Tiananmen Square Incident) on China’s inbound tourism were evaluated. The
result shows that the impact of the Event was not limited within one year, but it stretched over 3 years. The total loss was
20 million in tourist arrivals and $1620 million in foreign currency income. The paper also studied the trend of China’s inbound
tourism in the next 4 years.
Foundation item: Under the auspices of National Natural Science Foundation of China.
Brography: SUN Gen-nian(1961 —), male, a native of Xi’an City, Shaanxi Province, master of science, associate professor. His
research interests include environment science, geography modeling and MIS for tourism. 相似文献