已有勘探资料表明,西藏尼玛盆地古新统—始新统牛堡组地层具有良好的油气资源显示,然而目前有关于该套地层的地层格架划分仍然薄弱.化学地层学方法在北美页岩气勘探开发中取得了巨大成功,鉴于此,本文以尼玛盆地东部的协德乡南牛堡组剖面作为研究对象,通过对露头样品的主微量元素测试结果进行沉积地球化学、主成分分析、完备总体经验模态分解、以及自相关函数分析,从化学自—异旋回角度以及元素耦合行为出发,探讨地球化学基准面对化学地层格架的控制作用,从而为牛堡组地层提供化学地层划分方案.主成分分析结果表明,牛堡组地层沉积主要受控于细粒碎屑输入、碳酸盐岩、粗粒碎屑输入、氧化还原—生产力、以及盐度这五个因素;经验模态分解和自相关函数分析结果表明,牛堡组地层受到了明显的异旋回驱动,显示出多尺度基准面震荡特点.通过对异旋回信号分量(本征模函数,IMFs)进行重构,并且结合元素相互耦合特性,建立了牛堡组化学地层格架,该结果与岩石地层单元以及沉积相单元一致,证明了本文所提出的化学地层划分方案的可靠性和实用性.

陕西旬阳磊石沟金矿区矿体均赋存于强片理化含细粒黄铁矿化的岩屑砂岩中,通过研究分析,认为金矿化与岩屑砂岩中细粒黄铁矿关系密切,初步可以认定细粒黄铁矿为矿区内的标型矿物,本文依据岩矿测试结果,讨论区内细粒黄铁矿对找矿的指示意义.

文章从区内化探异常、含矿层位及赋矿岩性着手,总结含矿层位及赋矿岩层特征,开展了矿化控制条件等综合研究,进而对该地区的找矿潜力作出初步评价.

紫阳县龙洞沟硫铁矿位于安康地区硫铁矿成矿带内,该带内已发现并评价了多处硫铁矿床.矿区内地质构造复杂,地层岩相多变.本文从矿区地质特征入手,结合区域地质背景,对矿化成因进行探讨,区内硫铁矿产出于寒武系下统鲁家坪组上段,赋矿岩层为绿泥绢英糜棱岩、绿泥滑石岩,受后期构造影响发生强烈褶皱,初步认为区内硫铁矿矿床类型属沉积改造型.通过总结该地区的找矿标志,为该地区开展下步矿产勘查工作提供依据.

Using the trinity prospecting model which study the metallogenic geological processes to determine the metallogenic geological bodies, study the metallogenic structure to analyze the spatial distribution characteristics of ore bodies and study the ore forming fluid to determine the direction of ore prospecting, the prospecting forecast of the Bawanggou gold deposit in hanyin, shaanxi was researched. It is concluded that the large brittle ductile shear zone is the main deformation structure of the ore-forming geological body in the mining area. And the main metallogenic structures are the transition and the superimposed places of the ductile-brittle shear zone. The metallogenic structural plane is mainly the S-C foliation. The characteristic indication of mineralization is the formation of biotite phenocryst sericite quartz schist and sandstone or siliceous rocks. By using the prospecting prediction results, we predict the favorable metallogenic area and put forward suggestions for the exploration work in the Bawanggou gold deposit which is a major breakthrough in prospecting achievements. It indicates that the trinity prospecting model is of great guiding significance for the development of the mineral exploration work.

Naoyangping area is located in Caledonian fold zones of North Dabashan Mountains,in which structures and faults are well developed and fluorite mineralization is closely related to fault structures.Based on analysis of geological background and geological features of fluorite mineralization in the area,the ore-control factors and the genesis of the fluorite deposit have indicated geological conditions for prospecting a large-scale deposit existing in this area.

侨乡腾冲,既是著名的翡翠集散地,也是云南省工商业的发祥地之一。这座历尽沧桑的小城,边贸历久弥新。