| 1. | Base metals and gold are often found in association with magnetic minerals .
某些贱金属以及金常常与磁性矿物一起被发现。 |
| 2. | Base metals and gold are often found in association with magnetic minerals such as magnetite and pyrrhotite .
某些贱金属以及金常常与磁铁矿和磁黄铁矿这类磁性矿物一起被发现。 |
| 3. | Other organisms have small areas in which the magnetic mineral known as magnetite is concentrated
其他一些生物有一个被称作磁铁矿的磁性矿物集中的小区域。 |
| 4. | Magnetic minerals trapped inside ancient rocks have recorded hundreds of these so - called polarity reversals in the past 500 million years
在地磁反转后，指北针的指针会指向南极，而不再是冰冻的北极。 |
| 5. | It is important to study salawusu stratum using paleomagnetism method , to give some magnetic proof in age range , stratum correlation , paleoenvironment and paleoclimate , to test former research result . this paper has done systemic paleomagnetism investigation , at dishaogouwan section its magnetic character is : susceptibility value is relatively high and its curve fluctuates little , magnetic mineral is mainly magnetites . the susceptibility ams ellipse is oblate
随着古地磁学及其分支学科的发展和成熟，以及在一些古人类遗址研究中的成功运用，对萨拉乌苏地层进行系统的地磁学研究，从磁学的角度提供一些年代归属、地层划分与对比、古环境、古气候方面的成果，对近年来的研究成果进行印证或检验，为研究的焦点问题提供古地磁学依据很有必要。 |
| 6. | The characteristics of the secondary magnetic field induced by the strongly magnetic chain in low intensity field are described and the value of the secondary magnetic field is calculated . the order of magnitude of the magnetic field on the end surface of the magnetic chain made of magnetic minerals in real separation and the effective distance of the secondary magnetic field are estimated
介绍了强磁性磁链在弱磁场条件下产生二次磁场的特性，计算出磁链的二次磁场值，估算了实际分选时由磁铁矿物构成的磁链在端面处的磁场力量级以及磁链的二次磁场有效作用距离。 |
| 7. | Based on summarizing magnetic parameters and vicissitude and evolvement of environmental magnetic minerals , this paper introduce the main advances made in many fields such as soil and atmosphere contamination in monitoring urban environment pollution , and points out some problems in the study of environmental magnetism as well as some new development tendencies
本文在简述了环境磁学参数和不同环境中磁性矿物变迁和演化过程的基础上，介绍了环境磁学在城市环境污染的不同方面所取得的进展，探讨了环境磁学在土壤污染和大气等城市环境污染研究中的不足，提出了环境磁学在城市环境污染研究领域的发展趋势。 |
