西准噶尔地区乌图布拉克铜金矿化点为新发现矿化点,成矿地质条件优越,地表铜矿化以孔雀石化为主.本次针对西准地区锡伯一带开展了1:2岩屑测量、1:1万激电中梯测量,圈定出4处高充电率异常和6个化探综合异常,充分查明化探异常区地质信息和地球物理特征,指导进一步找矿工作部署.

Dahongliutan-Bailongshan area is the most important rare-metal concentration area in the West Kunlun-Karakorum where there are most concentrated granite pegmatites and most developed rare-metal mineralization. This paper comprehensively and systematically surmurized 21 lithium polymetallic deposits in this area based on the achievements of years of research, and divided the ore concentration area into the Dahongliutan ore field and Bailongshan ore field. The ore-bearing strata in the ore concentration area is the Bayankela Group, whose formation age is 214 similar to 223Ma. Meanwhile, the age of granite rock mass is 208 similar to 214Ma, the ages of non ore pegmatites and the ore-bearing pegmatites are 210 similar to 213Ma and 206 similar to 213Ma, respectively, which reflects the coupling relationship between the rare metal minerals and the Mesozoic magmatic rocks. The Li-bearing rare metal pegmatite veins formed by differentiation of the ore-forming parent rocks (biotite granite, biotite granite, etc.) in the late evolutionary stage are distributed in schistose zone or structurally weak area 500 similar to 2000m away from the intermediate-acid rock mass in the ore-forming strata of the Bayankala Group (or Kangxiwa Group), which conforms to the "trinity" ore-controlling law of structure-magma-horizon. At the same time, the project team divided the Dahongliutan-Bailongshan ore concentration area into five rare-metal mineralized pegmatite vein group belts from north to south, namely, the Aksayi rare-metal mineralized pegmatite vein group belt, the Dahongliutan north rare-metal mineralized pegmatite vein group belt, the Dahongliutan south rare-metal mineralized pegmatite vein group belt, the Bailongshan-Xuefengling lithium mineralized pegmatite vein group belt and the Fulugou-Shuangya lithium mineralized pegmatite vein group belt. Among them, the Bailongshan-Xuefengling and the Fulugou-Shuangya lithium mineralized pegmatite vein group belts are about 18km and 25km long, respectively, which are symmetrically zoned in the north and south of this area. The Fulugou-Shuangya lithium mineralized pegmatite vein group belt shows great prospecting potential, so it is an important belt for the next prospecting.

The Dahongliutan rare metal ore field in the West Kunlun Orogenic Belt was found in the recent years. The West 509Daoban Li -Be rare metal deposit in this ore field has drawn geologist' attention for its high grade and super-large ore reserves. However, the geological and metallogenic age of this deposit remain controversial. Field observations have revealed that the ore -bearing pegmatites in the West 509-Daoban deposit is closely related to the Triassic magmatic rocks, and they are both emplaced into the Triassic flyschlike meta -sedimentary sequences. Detailed mapping and exploration results show that the pegmatite veins in the deposit have obvious ore -bearing zonation, which can be divided into non -ore pegmatite and ore -bearing pegmatite. The 40Ar/39Ar dating data of muscovite in spodumen-bearing pegmatite veins show that their crystallization age is 188 Ma, indicating that regional temperature for this area kept as 350 C-o for 30Myr, and this thermal environment is conducive to the evolution and crystallization of granite -pegmatite system. In combination of the regional orogeny ( ca. 210 similar to 200Ma) of the Paleo-Tethys, the geological features as well as the ore -forming ages demonstrate that the tectonic environment of West Kunlun and Karakunlun was post -collision extension at 188 Ma, which is a favorable condition for the element enrichment and mineralization in Dahongliutan rare metal ore field. This understanding has practical significance for regional metallogenic potential evaluation and prospecting.

[研究目的]构造-流体与成矿的耦合关系属于目前矿床学研究的前沿问题,造山型金矿作为典型受构造变形控制的热液矿床,是窥探构造-流体与成矿作用内在联系的理想研究对象.[研究方法]萨瓦亚尔顿金矿床是西南天山地区规模最大的造山型金矿,通过野外构造解析,流体包裹体和C-H-O-S同位素地球化学数据,研究矿区的构造变形特征,分析成矿流体性质及其成矿物质来源.[研究结果]矿区变形可分3期:早期为韧性变形、中期为脆-韧性变形、晚期为脆性变形.根据脉体穿切关系和变形特征,识别出3期与构造相对应的石英脉(Qz1,Qz2,Qz3),其中Qz2为含金石英脉体,金矿主要形成于第二期的脆-韧性变形期.室内观测发现,早、中期石英中发育CO2-H2O型、纯CO2型和H2O溶液型3种类型流体包裹体,晚期仅发育水溶液型包裹体.早期石英中包裹体均一温度为237～386°C,盐度为1.4％～9.2％NaCl equiv.;中期石英获得CO2-H2O和水溶液包裹体均一温度为204～310°C,盐度为0.5％～16.6％NaCl equiv.;晚期水溶液包裹体具有较低的均一温度(125～235°C)和盐度(0.2％～10.6％NaCl equiv.).根据CO2-H2O型包裹体计算早、中期的流体压力分别为267 MPa和208～253 MPa,对应形成的深度分别为10 km,8～9 km.同位素分析结果揭示,成矿的流体具有变质流体以及大气降水的特征,成矿物质主要来源于赋矿地层-古生代碎屑岩-碳酸盐岩建造.[结论]萨瓦亚尔顿金矿床晚古生代经历了早期挤压向晚期走滑伸展的转变;早期NW-SE向的挤压作用促使地层变质脱水产生了大量富CO2、低盐度的变质流体,形成无矿石英脉;在构造变形转向走滑伸展时,造山带抬升剥蚀,流体压力降低并发生不混溶或沸腾作用,CO2等气体逃逸,诱发浅源大气降水加入并与变质热液混合,导致大量成矿物质快速沉淀成矿.

新疆某伟晶岩型锂多金属矿伴生钽铌锡等有价元素,其中钽铌主要以钽铌铁矿的形式存在,锡主要以锡石的形式存在.为提高伴生元素的回收率,根据矿石性质最终确定了粗磨—重选预富集—强磁选—离心分离的原则工艺流程,并开展了相关条件试验研究.重液分析确定重选适宜的入选粒度为-0.35 mm,在此条件下,通过螺旋溜槽粗选—摇床精选工艺实现了钽铌锡预富集.对预富集精矿进行锡石与钽铌铁矿的强磁选分离,适宜的工作参数为磁场强度800 mT、脉动频率260次/min.非磁性产品主要为锡石和锂辉石,在冲洗水量2.0 L/min、给矿浓度30％、给矿量1.0 kg/min的条件下,确定离心选别适宜的重力加速度为50G.根据条件试验确定的工艺条件,进行螺旋溜槽粗选—摇床精选—弱磁选—强磁选—离心重选全流程试验,最终获得了Ta2O5品位13.90％、Nb2O5品位29.14％、Ta2O5回收率49.50％、Nb2O5回收率58.37％的钽铌精矿及Sn品位41.45％、Sn回收率54.39％的锡精矿,有效实现了伴生有价矿物的综合回收.

帕米尔构造结位于青藏高原北缘,记录了自新元古代晚期以来到新生代完整的特提斯构造演化过程.在长期的构造-岩浆演化过程中,发育了不同时代、不同类型的成矿事件.野外调查表明,在帕米尔北东段,发育了含绿柱石的伟晶岩及含氟碳铈矿的碳酸岩(碳酸岩-伟晶岩组合).通过独居石及锆石U-Pb定年,识别出该区两期伟晶岩带(包括碳酸岩),分别是新生代和中生代(19～18 Ma和200 Ma),其中早期含绿柱石伟晶岩形成于古特提斯洋关闭后的伸展阶段,而新生代含氟碳铈矿碳酸岩-伟晶岩组合,与新生代陆内走滑伸展事件相关,表明帕米尔构造结伸展走滑启动的时间可能在19 Ma.结合区域地球化学异常特征,表明在帕米尔地区有望在稀有、轻稀土找矿上获得突破.

西昆仑-喀喇昆仑位于青藏高原北缘,是特提斯构造域的重要组成部分.近年来在该区有色金属找矿勘查工作取得重大突破,相继发现一批超大型、大中型铅锌矿床.罗布盖子大型铅锌矿位于甜水海-喀喇昆仑有色金属成矿带最西段,获得详查资源量大于100万t.笔者报道了该矿床的基本地质特征,确定该矿床的形成与白垩纪岩浆岩演化晚期的热液有关,并获得与成矿关系密切的淡色脉体独居石U-Pb年龄为(99.25±0.78) Ma,进一步证实该矿床属于岩浆热液矿床.依据区域地球化学勘查及区域地质背景的综合分析,认为在甜水海—喀喇昆仑分布的巨型铅锌矿带,受控于侏罗纪—白垩纪火山-沉积盆地及白垩纪岩浆岩,该成矿带具有重大找矿潜力.

新疆锂矿资源丰富,为优势矿产资源之一,新疆锂矿类型主要为硬岩性锂矿、盐湖卤水型锂矿两类,主要分布于四条成矿带上,分别为西昆仑-喀喇昆仑锂多金属成矿带、阿尔泰山锂多金属成矿带、阿尔金锂多金属成矿带及东天山锂多金属成矿带.在重点成矿带上,采用新技术新方法,就矿找矿,向深部进军,实现新疆锂矿找矿的突破.

简述了锂铍稀有金属资源分布、需求以及选矿工艺现状,并对浮选作用机理进行了概述,指出联合选矿工艺将成为复杂锂铍资源分离的发展趋势;仍需要加强锂铍浮选作用机理研究,丰富稀有金属浮选基础理论;开发绿色高效环保的浮选药剂,减少环境污染;强化钽、铌、锡、石英和长石等伴生资源的综合利用,降低固废排放.

萨色布拉克地区位于塔里木地台与天山南脉地槽褶皱带过渡部位-木孜托克过渡带,阿图什市萨色布拉克锌多金属矿为小型多金属矿床,矿床成因为矽卡岩型,矿化体受地层岩石构造等多因素控制,地表出露形态较简单,矿化不均匀,分布特征不明确,本次通过高精度磁法测量查明花岗岩与地层接触带地球物理特征,为开展阿图什市萨色布拉克锌多金属矿评价及深部找矿提供依据.

镜儿泉西地区出露十多个规模不等的镁铁质超镁铁质岩体，规模较大者约为0.02平米千米，且辉长岩中发育孔雀石化，为较好的找矿线索。本文通过在覆盖区较为适用的高精度重磁测量方法，对镜儿泉西铜矿化点开展评价。本次工作共圈出高重力异常8个和高磁异常7个，为基性-超基性岩引起，是寻找与基性–超基性岩有关的铜镍矿有利部位。 More than ten mafic and ultramafic complexes with larger scale about 0.02 square kilometers are presented in the western Jingerquan, eastern Tianshan, NW China. Base on the high precision gravity and magnetic measurement method in coverage area, we carry out the evaluation to the copper mineralization point in the western of Jingerquan in Hami. In this work, we delineated 8 high gravity anomalies and 7 high magnetic anomalies, which are caused by the basic ultrabasic rocks, and all of these anomalies are the favorable position to find the Cu-Ni mineralization which is related to basic ultrabasic rocks.

随着地质工作程度的不断加大,寻找露头矿和浅表矿的机会日益减少,国家重点研发计划"深地资源勘查开采"重点专项已将"深部矿产资源评价理论与方法"作为重要研究内容,未来覆盖区掩埋矿和隐伏矿将成为今后的重要勘查目标.本文以新疆塔城盆地别斯托别铜矿化点及化探异常为线索,利用X射线荧光分析仪(XRF)对矿化点、槽探、坑探等地质目标体进行快速测定,结合磁法测量、电法测量、重力测量等物探方法,对矿化点及异常区进行综合比较分析,快速评价,确定找矿靶区,缩小找矿范围.

塔城盆地处于“中亚大磁环”异常带边缘及其转折部位，化探综合异常显示了良好的找矿前景，在别斯托别一带出露的基性杂岩及其围岩的接触带附近发现多处铜矿化点。通过LA-ICP-MS锆石U-Pb测得别斯托别一带二长花岗岩年龄为266.1±1.8 Ma(MSWD=0.56，n=31),其代表该地区二长花岗岩侵入结晶年龄；辉长岩年龄为264.0±2.1 Ma(MSWD=0.46，n=42),代表该地区辉长岩结晶形成年龄。表明别斯托别地区花岗岩和辉长岩均形成于早二叠世晚期，而花岗岩稍早于辉长岩，这与在这个时期新疆北部形成了大量基性侵入体的事实基本一致。该年龄为该区岩浆演化时间时限厘定提供了新的证据。

别斯托别一带基性杂岩体与花岗岩接触带附近发现多处铜矿化点。对基性杂岩进行岩石化学特征分析，区内杂岩体为亚碱性岩体中的钙碱性系列基性火山岩。岩石样品投点及稀土配分图显示，杂岩体“亲缘性”较好，为同期岩浆结晶分异而成。同时，里特曼戈蒂里图解及花岗岩微量元素蛛网图反映了岩体应形成于同期碰撞构造造山环境。

岩石学特征是判断油气储层性质的重要标志,也是进行有利储层划分的重要基础.通过岩芯观察和描述,结合岩石薄、片铸体薄片、扫描电镜等资料,对吉木萨尔凹陷东斜坡梧桐沟组吉7井区储层特征进行了综合分析研究.结果表明:根据研究区梧桐沟组吉7井区取芯段87块岩石薄片观察及统计得出研究区砂岩为岩屑砂岩和长石质岩屑砂岩为主.胶结物中碳酸盐岩矿物组分以泥质、方解石、铁方解石和白云石组合为特征.胶结类型主要以接触一孔隙型、孔隙型、孔隙—压嵌型等胶结方式,胶结程度表现为致密和中等致密.支撑类型主要为颗粒支撑,颗粒间主要点接触为主.孔隙类型以剩余粒间孔为主.