浙赣中生代火山岩岩相与铀矿床类型研究

浙赣火山岩分布广泛并且产有重要的火山岩型铀矿床(赣杭构造带发育有五十一个火山岩型铀矿床)。通过对浙赣中生代火山岩相的划分及其特征的描述，划分出与其相对应的火山岩型铀矿床类型，即潜火山相对应于次火山岩型铀矿床、火山通道相对应于火山角砾岩筒型铀矿床、火山侵出相及火山喷发相之喷溢亚相对应于火山熔岩型铀矿床、火山喷发相之爆发亚相对应于火山碎屑岩型铀矿床、喷发沉积相对应于沉积火山碎屑岩型铀矿床。说明火山岩相与铀矿类型之间存在某种联系，研究火山岩相与其相对应的铀矿床对寻找火山岩型铀矿床有一定的指导意义。     

FMI测井技术在川东北地区碳酸盐岩溶孔溶洞型储层评价中的应用

碳酸盐岩储层储集空间复杂多样,溶蚀孔洞发育且具有较强非均质性。根据实际岩心表面溶孔发育空间位置、均匀程度和溶孔直径,结合FMI特征,建立了FMI储层类型精细解释图版,并应用于非取心段储层类型的解释。川东北地区下三叠统飞仙关组、上二叠统长兴组的孔洞型储层可细分为三类:较连通型储层、局部连通型储层和孤立型储层。在储层类型解释基础上,结合FMI特征半定量地计算溶孔面孔率。通过取心井的验证,FMI测井技术可有效地应用于评价溶孔溶洞型碳酸盐岩储层的非均质性。     

The first photometric investigations of the G-type shallow contact binary IO Cnc

IO Cnc was classified to be a new G-type(G0)W UMa-type eclipsing binary system.Our first multicolor photometric solutions show that IO Cnc is a new W-subtype shallow contact binary with a fill-out factor of f=16.1%and a low mass ratio of q=3.12(or 1/q=0.32).During orbital period investigations,a cyclic variation and a downward parabolic variation with a rate of(-1.28±0.43)×10^-7 d yr^-1 was discovered in the observed–calculated(O-C)curve.The cyclic variation was analyzed by the light travel time effect(LTTE)via a potential red dwarf companion star,an orbital semi-major axis shorter than 4.88±0.82 AU was obtained.Finally,we collect physical parameters of a sample of 50 G-type shallow contact binaries(f≤20%),it is suggested that most of the G-type shallow contact binaries are undergoing a longterm and periodic orbital period changes,especially more systems show long-term decreases.The long-term orbital period decrease indicates that IO Cnc is in a mass transferring from the more massive component to the less massive one.With the long-term decrease of the orbital period,this shallow contact binary will evolve into a deeper contact one.