广西凤凰山银矿—我国特有的Ag－Mn建造类型矿床

广西凤凰山银矿—我国特有的Ａｇ－Ｍｎ建造类型矿床广西凤凰山银矿，是我国特有的Ａｇ－Ｍｎ建造类型的大型独立银矿床。这是“广西西大明山地区凤凰山银矿成矿条件及远景评价”研究课题中的最新研究结论。该课题是由成都理工学院稀有贵金属矿床地球化学研究室承担，广西...     

融水县南古-甲乐镍钴矿床地质特征及找矿远景

广西融水县南古—甲乐镍钴矿床位于九万大山—元宝山地区锡、铜、钴、镍(铅、锌、锑)成矿区之元宝山西侧超基性岩带上,其镍钴矿体赋存于岩体的接触带和岩体底部,矿床的成因类型为变质岩浆硫化物钴镍矿床,达到中型矿床规模。文章在普查成果基础上,通过对该矿地质特征等分析认为,该区具备寻找大型矿床的找矿远景。     

广西北山式铅锌、黄铁矿床成矿模式及找矿远景

北山铅锌、黄铁矿床是一大型矿床。广西与其类似的矿床很多,文中称这类矿床为“北山式铅锌、黄铁矿床”。因这类矿床热液成矿的特征明显,又远离岩浆岩,前人多定为“层控矿床”。笔者借用前人对北山矿床研究的成果资料进行分析,认为这类矿床是“热卤水热液矿床”。并探讨了这类矿床的成矿模式及其在广西境内的找矿远景。     

广西宾阳县高田铜钨矿床地质特征及找矿远景

文章对广西宾阳县高田铜钨矿床的地质特征进行了分析和总结,认为矿床成因类型应属岩浆期后高-中温热液裂隙充填型铜钨矿床.成矿主要受岩浆期后热液及构造控制,该区有较好的成矿地质条件和找矿远景.     

广西锡矿矿床类型及典型矿床地质特征

广西锡矿资源丰富,是中国重要的锡产地之一.为更好地研究广西锡矿成矿理论及指导找矿实践,文章在研究大量文献的基础上,总结规律,分析广西区内锡矿矿床类型及典型矿床地质特征.广西锡矿具有典型的多旋回岩浆成矿地质特征,以雪峰期、加里东期、燕山期为主.根据不同的成矿地质条件、成因机制,可以将区内的锡矿划分为多种矿床类型,总体表现...     

罗城宝坛锡矿一洞—五地矿区431矿带找隐伏矿初探

宝坛锡矿位于桂北九万山区,矿床在一个古纬向构造带中,是我国少有的成矿时代较老的锡矿床之一。矿区经广西第九地质队,第七地质队多年勘查工作,探明大型锡矿床一处,中型矿床两处,小型矿床及矿点多处,锡矿远景还不断在扩大。 矿区自进行锡矿勘查工作以来,地质队和科研单位就已结合找矿工作进行了大量专题研究,提交了多份专题研究报告。专题研究报告中、以1979年广西第九地质队的“广西罗城宝坛锡多金属矿成矿远景区划报告”,1984年广西第七地质队和中国地质科学院矿床研     

广西凤山金牙金矿床——我国独特的卡林型金矿床

广西凤山金牙金矿床是我国近年来在滇黔桂地区具有大型规模、并有潜在远景的卡林型金矿床。它与国内外同类型金矿床相对比,除某些共同特征外,在成矿地质条件、矿床矿物、主要载金矿物、矿床地球化学特征、矿床成因又成矿模式等方面均有其独特之处。上述内容的研究,对金牙矿区外围及滇黔桂毗邻区找寻卡林型金矿床,具有一定的理论和实践意义。     

广西陆川安垌钼矿床地质特征及成因探讨

广西陆川安垌钼矿床位于博白褶断带的蟠龙—三滩钨、钼、黄铁矿成矿带上,该矿带成矿作用强烈而集中,特别是燕山晚期的成矿作用。文章根据矿床地质特征及同位素特征分析,认为矿床是与燕山晚期侵入岩有关的中高温斑岩型矿床,具有中—大型远景规模。     

岩浆作用成矿实验室突破传统模式

正近日,国土资源部岩浆作用成矿与找矿重点实验室鉴于岩浆铜镍硫化物矿床的特殊性,突破以往按成矿区带评价的模式,首次以矿床类型开展找矿潜力与远景评价研究。据了解,该实验室理清了中国岩浆铜镍硫化物矿床成     

广西重晶石矿床地质特征及其成因探讨

本文是广西重晶石矿产资源调查研究成果的主要部分。文中侧重地以矿床实例概述了广西重晶石矿床的沉积型、热液型和残坡积型及其六个亚类的矿床地质特征,并结合成矿地质条件,探讨了三个类型矿床形成机理。此外,划分了四个成矿远景区,可供找矿参考。     

广西晚二叠世成煤模式探讨

广西晚二叠世成煤模式划分为“两类三型”,即泥炭沼泽成煤模式和泥炭坪成煤模式两类,沼泽型、潮坪型和泥炭坪型等三型。文章阐述了这些成煤模式在吴家坪期和长兴期形成的特征,分布状况,以及代表煤层,指出潮坪型是广西晚二叠世时期最主要的成煤模式。     

THE MIRE IN NORTHEAST OF CHINA

The northeast region is one of the principal mire distribution regions in China. According to the process of peat formation and accumulation , middle geomorphology type controlling water source supplement and the plant cover, 2 types, 10 subtypes and 27 mire bodies are divided. The mire area decreases gradually from north to south. There is more peat mire in the mountain and there is mainly gley mire without peat in the plain. The paper also explains the mire types in the principal mire distribution region and the utilization of mire in the fields of agriculture, forest, animal husbandry. The mire is a wetland ecosystem. It can reserve a lot of water, adjust rivers, humidify air. Thereby , attention must be paid to protecting ecological balance in the process of reclaiming mire and the mire protection.     

贵州省盘县晚二叠纪聚煤规律研究

基于层序地层研究,区内聚煤作用主要发育于三级层序SQ1,SQ3,SQ4海侵体系域中,发育"根土岩—煤—粉砂岩/泥质粉砂岩/粉砂质泥岩/石灰岩"序列。海侵作用早中期,较高的泥炭堆积速率与可容纳空间增加速率相平衡,沉积了区域稳定分布的厚煤层6,14和29号煤层,最大海泛面附近的煤层较薄甚至不发育。     

红阳煤田石炭-二叠纪含煤地层的沉积特征

红阳煤田含煤地层太原组与山西组,是一套典型的“海陆交互相”沉积。依据剖面上沉积相序列变化特点,可划分为14个沉积旋回,每个沉积旋回均含有一层煤。有二种聚煤环境:一是海水退出潮坪后形成的泥炭沼泽聚积的煤层;二是扇三角洲平原形成的泥炭沼泽聚积的煤层。     

广西主要金矿床的地球化学特征

文章概括了广西主要金矿床的地球化学特征 ,综合分析了各类金矿床的地质特征和地球化学特点 ,并形成了各类矿床的金地球化学模型图     

铁法盆地西部矿区16~＃煤聚积环境背景及聚煤特征

铁法盆地西部矿区１６＃煤是在冲积扇前网结河－湖缘三角洲－湖泊环境组合背景上大面积泥炭沼泽化而形成的。聚煤环境有湖缘三角洲平原泥炭沼泽、湖滨泥炭沼泽、冲积扇前湿地泥炭沼泽和网结河湿地泥炭沼泽。其中，湖滨和湖缘三角洲平原的泥炭沼泽垂向叠加地段构成北部富煤带的主体，冲积扇前湿地泥炭沼泽形成了南部富煤带的主体     

Grain-size characteristics of sediment in Daniugou peatland in Changbai Mountains,Northeast China: Implications for atmospheric dust deposition

The grain-size distribution characteristics and grain-size parameters of sediment in two vertical sections of Daniugou peatland in the Changbai Mountains were systematically investigated. A comparative analysis of the sediment granularity using a discriminative function with Hongyuan peat, red clay, loess-paleosol, fluvial deposit as well as lacustrine deposit was also conducted. It turns out that the vertical section of Daniugou peat ash is primarily constituted by clay and silt particles, and the content of sand is relatively small. Grain-size frequency curves generally show a single-peak modality while a bimodal pattern is detected in the upper layer. The grain-size component and peak pattern of grain-size frequency curves also illustrate that peat ash materials were transported to the peatland by long-range aeolian dust during the deposition process, while there existed short-distance dust influence in peat deposition of the upper layer. Comparisons of grain-size parameters and the discriminative Y-value of Daniugou peat ash with those of typical aeolian sediments show close similarities, suggesting the possibility that atmospheric dust transport processes were involved in the accumulation of peat again. Moreover, the variations of grain-size distribution suggest the local environmental deterioration which is just the driving force of local dust elevation. Grain-size analysis of peatland sediment is demonstrated to be one effective method to extract information about regional and global environmental evolution, and more attention should be paid to current local ecological environment and to seeking a balance between economic development and environmental protection in Northeast China.     

广西桂林桐木湾石灰岩矿山地质灾害发育特征及其防治措施

桂林是广西石灰岩矿的主要产出地之一,及时合理地处理矿区地质灾害是关系到矿山安全建设和解决地质环境问题的关键环节。该文以桂林桐木湾石灰岩矿山为例,通过分析该区现状地质灾害发育程度,结合矿山地质环境特征,进一步预测采矿活动可能引发和加剧的地质灾害类型以及地质灾害易发区和危险区,并在此基础上作出地质灾害综合发育程度分析,提出合理可行的防治监测措施。     

桂西铝多金属矿床地质地球化学特征与成矿机理

对桂西地区铝土矿及其围岩系统取样,进行了微量元素分析。结果表明,原生铝土矿的成矿母岩主要为下二叠统茅口灰岩,其次有少量古陆风化物的加入;区内原生铝土矿形成于海相的沉积环境,堆积型铝土矿由原生沉积型铝土矿风化淋滤而成。     

Radiocarbon ages of different fractions of peat on coastal lowland of Bohai Bay: marine influence?

Peat in boreholes is the most important ~(14)C dating material used for constructing age framework. 20 bulk peat samples were collected from five boreholes, the ~(14)C ages of two fractions(organic sediment fraction and peat fraction) of the bulk peat samples were investigated by AMS-dating and which fraction is better to help construct an age framework for the boreholes were compared and discussed. The results indicated that the peat fraction give a good dating results sequence in the boreholes, compared with the corresponding organic sediment fraction. And the dating results of organic sediment fraction show 161-6 702 years older than corresponding peat fraction, which was caused by marine influence. Then, we suggest an experience formula as y =0.99 x-466.5 by the correlation analysis for correcting the marine influenced organic sediment ages within the conventional ages between 4 000 to 9 000 yrs BP, and more study should be carried out for the AMS ~(14)C dating of the bulk organic sediments.