浅析某金矿勘查中物探方法的应用

作者针对某金矿勘查中地面高精度磁测和二维激电测深勘探的应用进行总结,希望能对该类型金矿的勘查有一定参考意义。     

几种不同类型金矿的高精度磁测异常特征

许多金矿的赋矿(或伴生)岩石与其周围岩石之间存在着磁性差异,如与中基性脉岩有关的金矿成因模式矿床、破碎蚀变火山岩型金矿等,在其上能观测到磁异常.即使是河床底部缝隙中与砂金相伴沉淀的重砂,由于铁磁性矿物含量较高,与其附近砂石之间存在磁性差异,利用高精度质子磁力仪,也能观测到比较明显的磁异常.在西藏自治区及四川省一些金矿床(点)上的研究取得了良好的进展,对砂金矿、锑金伴生型金矿,中基性脉岩型金矿上的高精度磁测异常特征有了新的认识,为利用高精度磁测方法间接寻找金矿积累了经验.     

井-地磁测在松山铁矿勘查中的应用

井-地联合磁测是用于金属矿深边部勘查的主要方法之一,在"攻深找盲"新一轮找矿战略中起到了重要作用。将井-地联合磁测应用于江西省松山铁矿勘查,对矿区181个标本进行了物性参数测量,开展了1∶1万地面高精度磁测及ZK6209井中磁测。通过地面磁测查明了区内的磁异常分布特征,圈定了7处磁异常及一处找矿靶区;通过井中磁测对井旁盲磁性矿的形状和规模作出了空间定位预测和验证。综合分析,井-地联合磁测为松山矿区找矿及下一步勘查工作提供了决策依据。     

金矿矿产勘查新型技术方法应用探析

针对当前金矿矿产勘查工作中普遍存在的"测不准"问题,笔者结合丰富的野外金矿勘查工作经验,分别从物探测量技术、地表找矿技术、3S与三维技术三个方面,详尽探讨了金矿矿产勘查中新型技术方法的应用,旨在为提高野外金矿矿产勘查工作水平有所帮助.     

甘肃阳山金矿勘查方法有效性研究

文章在综合甘肃阳山金矿区物化探方法已有成果基础上,选择可控源音频大地电磁测深(controlled source audio-frequency magnetotellurics, CSAMT)、大功率激电(induced polarization, IP)、地面高精度磁法及构造叠加晕等方法在主要成矿地段开展应用研究,对各方法应用效果进行了分析评价,建立了矿区深部勘查方法组合及应用流程。研究成果可为矿区深部和外围勘查以及类似地区金矿勘查方法的精准实施提供参考。     

高精度磁测在寻找磁铁矿中的应用实例

介绍了在磁铁矿床勘查中高精度磁测可以发挥它独特的作用,取得良好的找矿效果.(青海格尔木某铁矿区为了扩大矿床规摸,在本区投了一定量的高精度磁测面积工作,结果新发现了一处隐伏的含铜磁铁矿,扩大了原矿区的矿石储量 ).     

高精度磁测在镇康芦子园矿区勘查中的作用及效果

云南镇康芦子园矿区高精度磁测对磁铁矿床的勘查及地表磁铁矿体的圈定起到重要指示作用,并为推断中深部是否存在隐伏中酸性岩侵入体及岩体顶部磁性蚀变带(或多金属矿化矽卡岩)提供了磁测依据.通过异常查证,发现芦子园磁异常由矽卡岩型磁铁矿引起,异常规模大,预测铁矿远景资源量超过3亿t,铅锌远景资源量超过300万t.高精度磁测在芦子园矿区取得了较好的地质找矿效果.     

不同比例尺地面高精度磁测的应用效果思考

地面高精度磁测是战略性矿产远景调查中广泛应用的物探方法之一。在野外经常会出现在经1：5万高精度磁测工作后未发现异常，而应用1：1万高精度磁测时磁异常形态较好。通过在小孤山磁铁矿分别开展不同比例尺高精度磁测的磁异常进行对比，建议地物化综合考虑，在地质认为有成矿可能性面积较小的区域进行1：1万高精度磁测，需要对异常作定量推断时，还必须设计精测剖面。     

综合物探方法在湘东川口矿田毛湾矿区钨矿找矿中的应用

毛湾矿区位于我国著名的有色金属产地湘东川口矿田钨矿富集区.本文从地质背景、矿区地质特征、岩矿石物性特征等方面入手,并结合地面高精度磁测和EH4高频大地电磁测量,系统阐明矿区钨矿地质、地球物理特征.初步认为毛湾矿区岩体型钨矿地球物理特征为高正磁异常和低视电阻率值特征.矿区勘查结果表明:地面高精度磁测和EH4高频大地电磁测量的联合应用,可以快速圈定深部岩体型钨矿化异常体,为后期的钻探工程部署提供有力依据.     

钻孔内照相测斜在桂西某金矿的实践应用

孔内照相测斜技术是近年发展的新技术,在广西应用于金矿勘查等还是首次,通过本次实践,照相测斜技术是成熟的、可靠的,并提出了改正建议。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.