图拉达金矿位于俄罗斯外贝加尔边疆区内的达拉松矿田西北角,矿区内矿体受控于NE和NNE向断裂,主要赋存于NNE向的破碎角砾岩中,矿石类型主要为含金碎裂角砾岩型.矿体形态多呈脉状、透镜状,产状较稳定,后期构造对矿体影响较小;矿体内部结构复杂,局部有明显的膨胀收缩、分支或分支复合、波状弯曲现象.矿体围岩蚀变为热液蚀变,主要类型有绿泥石化、绿帘石化、碳酸盐化、绢英岩化和硅化等.主岩体与主岩体外围的断裂构造内蚀变以及NE向断裂与近SN向断裂的交切部位是寻找碎裂角砾岩型金矿床的重要标志.通过研究图拉达金矿以及所在矿田的地质特征和找矿标志,对于国内地质工作者进一步了解中俄蒙跨境区域成矿规律和在矿区内发现更多金矿体具有重要的借鉴和指导意义.

臼齿构造主要发育于中新元古代地层中,目前所报道的臼齿构造均由纯净的、基本等粒的微晶方解石(或白云石)构成.野外地质考察中,在北京南口长城系高于庄组第3段泥晶灰岩中发现了形态多样的臼齿状构造,野外观察和室内显微镜下分析,发现臼齿状构造与宿主岩石边界多呈圆弧状或港湾状,界线清晰.扫描电镜(SEM)和能谱分析(EDX)表明,"臼齿"成分主要以硅质为主,矿物成分为玉髓和自生石英.从臼齿状构造的形态和充填序列分析,发现南口臼齿状构造形成经历了裂缝形成、裂缝充填和后期破坏再充填等过程.认为臼齿状构造可能是多成因的结果,其中在半固结的条件下由地质事件引起的微裂隙系统可能是臼齿状构造形成的重要因素之一.

通过对新疆柯坪地区上石炭统-下二叠统康克林组和巴立克立克组腕足动物化石的系统研究,共鉴定出46属82种,根据垂向分布将腕足动物群划分为5个组合,其中康克林组自下而上划分为Avonia-Dictyoclostus组合,Schizophoria-Brach yth yrina组合,Orthotetina-Chonetes组合和Compressoproductus-Enteletes组合;巴立克立克组划分为Plicati fera-Limplecta组合.区域对比表明,研究区晚石炭世-早二叠世腕足动物群生物古地理区属于特提斯大区,混有少量北方大区冷水型分子,早二叠世混生的冷水型分子较晚石炭世明显增加.从Orthotetina-Chonetes组合开始,明显出现早二叠世分子.腕足动物的演化阶段特征表明,腕足动物群对石炭系-二叠系界线的响应明显滞后于牙形刺和筵类等生物门类,即明显变化发生在康克林组的中下部.

比勒提地区位于新疆西南天山,以该区1∶50000高精度磁测数据为基础,采用解析延拓、方向导数等技术手段提取与断裂构造有关的磁异常信息,对区域内构造进行识别,结合标本物性参数统计,对引起磁异常的原因进行分析.对区域磁异常向上延拓及求一阶导数后进行对比,圈定4个特征异常带A1～A4,结合地质资料,识别出4条断裂构造FW1～FW4,FW1和FW2对应喀拉铁克断裂及其次级断裂,FW3为构造动力作用产生的强片理化带,FW4为隐伏断裂,表明高精度磁法测量在本区能有效识别断裂并反映其分布.

Shanhou-Shangzhuang area is located in the middle south segment of Zhaoyuan-Pingdu fracture belt.Gold mineralization is controlled by Zhaoyuan-Pingdu,Jianli fault and secondary fractures on its two sides.Though analysis of faults,combination of field information,we think NNE、NE trending faults are the main leading and contain the ore structure,it controls the distribution of orebody.Gold mine distribute at the edge of circular structure and intersection of circular and linear structure.We point out the next prospecting,deep exploration should be between 16 to 24 lines.Also,we should attention if there is the second barren interval,external prospecting should be in the region from Ximeng Reservoir to Huangling as the focus in the future.

Many gold deposits have been discovered in Jiao-Lai basin and its periphery.The main type of discovered deposits as follows:middle temperature hydrothermal metasomatic alternation rock type gold deposit controlled by slid dismantled fault(Pengjiakuang in Rushan),middle temperature hydrothermal metasomatic filled alternation gravelstone type gold deposit controlled by tectonics(Fayunkuang in Muping),middle temperature hydrothermal-reformed type gold deposit(Dazhuangzi in Pingdu),subvolcanic rock type gold deposit(Qibaoshan in Wulian).Their geneses are discussed.Analyzing their ore geological characteristics,deposit types and genesis,evolving history,we find that they are both similarities and differences,in different tectonic location,different ore-forming fluid add in to form different types of gold deposits.On this bases,we hope that it can promote the research of the deposits in Jiao-Lai basin and its periphery,and direct farther prospecting derection.