绥滨盆地煤中微量元素产出特征研究

绥滨盆地位于黑龙江省东北部,与我省著名的集贤煤田隔松花江南北相望,为一北东向展布的中生代构造盆地,面积约4850平方千米。通过对本区钻孔化验测试数据分析,研究煤中微量元素产生特征,从而深入总结绥滨煤田古地理、成煤环境和煤质特征。     

浅谈斑岩型铜矿床找矿标志

斑岩型铜矿床是一类与浅成、超浅成中酸性侵入体（斑岩）有关的规模大、品位低的铜矿床。它是世界上最主要的铜矿类型,目前占世界铜资源量和产量的一半以上。据其所含的金属,可将其划分为斑岩铜钼型和斑岩铜金型,     

费米BL Lac天体的中红外-伽马波段辐射相关性

在395个费米BL Lac天体中,337个在其位置的2.4"区域内有唯一一个广域红外探测器(Wide-Field Infrared Survey Explorer,WISE)对应体.在[3.4]-[4.6]-[12] μm双色图中,绝大多数费米BL Lac天体处在WISE blazar strip (WBS)中,表明这些源的中红外辐射由非热辐射主导.平均来看,LBLs的中红外谱指数比HBLs大,IBLs介于这两者之间.中红外谱指数和伽马谱指数都与对数同步辐射峰值频率成显著反相关.伽马波段和中红外波段的谱指数和流量存在着显著的正相关.     

鲁东胶北地区中太古代唐家庄岩群

１０余年来,通过对鲁东胶北地区太古宙地层的研究,原胶东群中剔除出大量的变质变形深成侵入岩,并从其底部分离出一套呈包体状态残存于花岗质岩石中的紫苏磁铁石英岩、二辉斜长角闪麻粒岩等,据此建立了唐家庄岩群。该岩群为一套经受角闪麻粒岩相高级变质的表壳岩组合,同位素测年数据为２７６３～２９３６Ｍａ,与之相伴产出的超基性岩同位素地质年龄值为２６９３～３１５０Ｍａ,其特征与鲁西地区沂水岩群相似,说明太古宙时鲁东和鲁西曾是一个统一的克拉通陆核。     

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伊犁石炭纪裂谷的时空演化特征

通过对伊犁盆地石炭纪裂谷火山岩的地层学、岩石学、岩石地球化学等方面的论述,分析了裂谷的形成与演化,探讨了裂谷形成的区域动力学背景。认为裂谷期火山活动具幕式喷发的特点;随着时代的演替,裂谷由初始裂陷的察布查尔－伊什基里克一带扩展到整个伊犁地块;裂谷的形成主要与中天山南北两侧古洋壳的相向俯冲所导致的地幔物质上涌、中上地壳的背向伸展有关。     

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Millennial-centennial scales climate changes of Holocene indicated by magnetic susceptibility of high-resolution section in Salawusu River valley,China

The upmost segment(Holocene series)of the Milanggouwan stratigraphic section(MGS1)in the Salawusu River valley shows 11 sedimentary cycles of dune sands and fluvio-lacustrine facies,or dune sands and paleosols.The analysis of the magnetic susceptibility of this segment suggests that there are 11 magnetic susceptibility cycles with the value alternating from low to high,in which the layers of the dune sands correspond to the lower value of the magnetic susceptibility and the layers of fluvio-lacustrine facies and paleosols correspond to the higher peaks.The study reveals that the low and high magnetic susceptibility values indicate the climate dominated by cold-arid winter monsoon and warm-humid summer monsoon of East Asia,respectively,and the study area has experienced at least 22 times of mil-lennial-centennial scales climate alternation from the cold-arid to the warm-humid during the Holocene.In terms of the time and the climate nature,the variations basically correspond to those of the North Atlantic and some records of cold-warm changes in China as well.They might be caused by the alternation of winter and summer monsoons in the Mu Us Desert induced by global climate fluctuations in the Holocene.