Polymetallic metallogenic belt in the northern margin of the North China craton is a typical non-ferrous and rare metal polymetallic metallogenic area in which mineralization is closely related to well-developed granitic magmatism of Early Yanshan period.The middle of the Inner Mongolia Autonomous Region is located in the middle section of the northern margin of the North China block,and is one of the largest resource provinces with three-type rare mineral resources(rare resources,rare earth, scattered resources)of China.The reserves of Nb2O5and rare earth are among the first in China.Different characteristics of metallogenic background,metallogenic characteristics and metallogenic elements between Shihuiyao and Zhaojinggou rare metal deposits of Granite type were compared, and the prospecting marks were summarized.It was speculated that regional mineralization of rare metals might exist in the middle of the Inner Mongolia Autonomous Region.

新疆准南煤田沙县石场一带主要的含煤地层是八道湾组.本文从区域和研究区的地层、构造入手,结合研究区的煤层特征,分析了聚煤规律和控制因素,得出:古环境是提供聚煤可能性的条件,而聚煤作用的强弱则很大程度上受古构造活动的方式和强度控制.

Chinese Da Hinggan Mountains is one of the important metallogenic clusters of eastern China. It is the most representative in the area of lead and zinc-copper-molybdenum-silver-gold clusters. According to the geological and other main characteristics of the mineralization in the study area, the main polymetallic ore deposit area was divided into two metallogenic systems: the late Paleozoic-Mesozoic porphyry-hydrothermal mineralization system and Mesozoic tectonic hydrothermal metallogenic system. Types of main minerals, geological characteristics and the ore-forming genesis were further discussed. Metallogenic regularities are obtained as follows: ①From the ore formation, surrounding rock of ore deposit are mainly Permian, Jurassic acidic volcanic rocks and volcanic rocks; ②From the tectonic control mine, the collapse anticline axis belt, north east and north west fault interchange is the good place of ore; ③From the metallogenic epoch, period of indosinian and yanshanian is an important metallogenic stages; ④From the prospecting type, the main output are volcano-intrusive complex related skarn type, porphyry type-epithermal type polymetallic deposit, other new type of ore deposits may also be found.

The Daxinganling belt is one of important mineralization concentrated area in eastern China.The skarn type polymetallic metal deposit is located in Permian marble or crystalline linestone intercalation.The collapse zone located in axis of complex anticline and fault junction are favorable place for deposition of metallogenic elements.The large sized Baiyinnuoer and Haobugao Pb-Zn deposits were discovered in recent years.Both Pb-Zn deposits are experienced in intermediate temperature and high temperature mineralization stages and both ore lead isotopes belong to radioactive origin,which indicated that ore-forming minerals mainly are from crust source lead,and the sulfur isotope of sulfide minerals mostly have lower positive values and distributed in babel form,which indicated that the deposits have the characteristics of magmatic sulfur.The study resuh of oxygen isotope of quartz associated with sulfideshows that the ore-forming fluid mainly came from deep magmatic fluid,and mixed with atmospheric water or strata water.Therefore,the deposit should belong to the intermediate-high temperature skarn lead-zinc deposit related to deep concealed rock mass.

岩浆铜镍硫化物矿床的形成主要受控于地幔熔融过程和幔源岩浆在地壳浅部达到硫化物饱和.其中,幔部分熔融过程影响了岩浆侵入到地壳的方式和幔源岩浆中金属元素含量,高程度的地幔部分熔融有利于形成具有经济价值的岩浆铜镍硫化物矿床.幔源岩浆在地壳浅部达到硫化物饱和主要受控于温度、压力、氧逸度和成分的改变.分离结晶、CO2加入到岩浆中、岩浆混合、富硅的地壳物质混染和地壳S的加入等机制都可以造成岩浆达到硫化物饱和.其中地壳的S的加入被认为是最有效的机制.

文章介绍了小西沟金矿的矿床地质概况,并对矿石物质成分、金的赋存状态及分布规律进行了分析,得出:金的载体矿物是黄铁矿;金在矿区中部1 590m～1 817m标高范围内以层状、似层状、透镜状呈向斜构造形态产出;金与黄铁矿关系非常密切,并在其中富集。

Xilinhot area of Inner Mongolia,with complicated geotectonics,with favorable geological background for mineralization and many kinds of nonferrous metal mines is favorable for exploration.On the basis of studying the geological characteristic,geochemistry characteristic and orebody characteristic of Zhuerga molybdenum-silver-lead-zinc deposit,the following mineralization rules are summarized:the orebodies are hosted in inner and outer contact zone between early Yanshan period(biotite) monazite granite(ηγ52) and upper Devonian Angelerwula Fm.(D3a) meta-siltstone and meta-acidic to intermediate volcaniclastic rocks.The granite rock supplied the mineralizing fluid and NE trend fault supplied conduit for ore-forming fluid and mineralization space.And so the area adjoining to main fault/facture in the southwestern part of mine area and inner contact zone of granite rock bodyshould be the foucus for the future exploration.

Xilinhot area, Inner Mongolia has a great mineralization potential for its complicated geology and structure, the favorable ore-forming geological background and many types of nonferrous metal deposits.Based on analyzing a typical geochemistry anomaly from the 1∶50000 regional geological survey in Abaga County, Inner Mongolia, we discussed the mineralization mechanism and condition and obtained metallogenic rules so as to propose the direction for further geological work.

The Qiagong iron deposit is a newly discovered deposit,but geometric characteristics of its ore body such as the shape,size,strike,position,attitude and boundary have not been systematically studied.Based on a wavelet and multi-scale analysis of theoretical model data and measured data and a comparison of the application results between the upward continuation and the wavelet and multi-scale analysis,the authors hold that the wavelet multi-scale decomposition of magnetic anomaly can play an important role in search for deep-buried mineral deposits.

The Qiagong Iron deposit is a newly discovered deposit,but geometric characteristics of its ore body such as the shape,size,position,occurrence and boundary have not been fully tested.Based on a wavelet and multi-scale analysis and Euler deconvolution method,the vertical signal of potential field is separated and the sources depth is estimated.The two methods mentioned above are jointly used to detect the magnetic source depths,which could play an important role in locating the deep-buried orebodies.

The application effect of the induced polarization method in the silver-lead molybdenum mine in Shenzha County of Tibet is introduced.Based on the IP intermediate gradient and IP sounding,the authors delineate five induced polarization anomalies,and explain the characteristics of anomalies source and the polarized object combining with the IP characteristics and elecrical properties of rock and ore.It is suggested that Mη1,Mη2,Mη5 show low resistivity,ηs shows low amplitude and its anomalies scale is small,while Mη3,Mη4 show low resistivity,ηs shows high amplitude and its anomaly scale is large.Finally,the authers give appraisal based on geophysical prospecting and effectiveness,which provide the evidence for further survey and geological work.It is of certain reference signifance in looking for the same type mineral deposits in the region.

Haarhadda iron deposit is one of the most important Fe deposits in Inner Mongolia Province,it is found that the ore source beds lie in sericite-quartz schist-hosted rock section of the Ondor Sum Group Haarhadda Formation.Based on the study of metallogenic-geological conditions,geophysical and geochemical characteristics,the authors conclude and abstract the ore-controlling geological factors of deposit and geophysical prospecting criterion,finally,a comprehensive geology-geophysics;prospecting model related to the Haarhadda iron deposit is established,which provides the evidence for further surveying and geological work.