可可西里岩石圈向北俯冲到柴达木地幔的地震学证据

利用中美德INDEPTH IV合作项目2007—2009年间布置于青藏高原中、北部140个宽频地震台站记录到的天然地震数据,经过接收函数成像处理,获得了3条穿过昆仑—阿尼玛卿缝合带清晰的壳幔结构图像.结果显示柴达木南缘莫霍面位于约50 km深度,羌塘地块、可可西里地块、东昆仑造山带莫霍面位于约65 km深度,昆仑—阿尼玛卿缝合带以北约50 km存在莫霍面深度突变.在可可西里和柴达木岩石圈地幔之间观测到北倾界面,这可能是可可西里岩石圈向北俯冲到柴达木地幔之下的证据.可可西里地块地壳内宽缓的负转换震相带是低速带的反映,其向北挤入到东昆仑山下发生挤压增厚,可能是东昆仑山隆升的原因;由于刚性柴达木岩石圈的阻挡,物质向东改向,则可能是该地区向东旋转的构造应力场产生的原因.本文研究结果不支持亚洲岩石圈地幔在东昆仑—柴达木交界处向南俯冲,据此,我们提出了新的东昆仑造山模式.

     

Antioxidant system responses in two co-occurring green-tide algae under stress conditions

Green tides have occurred every year from 2007 to 2014 in the Yellow Sea. Ulva prolifera(Müller) J. Agardh has been identified as the bloom-forming alga,co-occurring with U. intestinalis. We observed distinct strategies for both algal species during green tides. U. prolifera exhibited a high abundance initially and then decreased dramatically,while U. intestinalis persisted throughout. The antioxidant system responses of these two macroalgae were compared in the late phase of a green tide(in-situ) and after laboratory acclimation. Lipid peroxidation and antioxidant system responses differed significantly between the two. Malondialdehyde and hydrogen peroxide contents increased significantly in-situ in U. prolifera,but not in U. intestinalis. In U. prolifera,we observed a significant decrease in total antioxidant ability(T-AOC),antioxidant enzymes(SOD and Apx),and non-enzyme antioxidants(GSH and As A) in-situ. U. intestinalis showed the same pattern of T-AOC and SOD,but its Gpx,Apx,and GSH responses did not differ significantly. The results suggest that U. prolifera was more susceptible than U. intestinalis to the harsh environmental changes during the late phase of a Yellow Sea green tide. The boom and bust strategy exhibited by U. prolifera and the persistence of U. intestinalis can be explained by differences in enzyme activity and antioxidant systems.     

Genetic study of Kelp “901” strain

Based on DNA extraction and optimization of random amplified reaction (RAPD) to the gametophytes and sporophytes of Kelp “901” strain, genetic study on variation was conducted to its parents and offsprings of F6, F7,Fs, and F9 generation. RAPD results have shown that among 30 selected primers for gametophytes, 297 loci ranging from 200 to 3 000 bp were obtained in the average of 9,9 loci for each primer, This indicated a high polymorphic rate with RAPD detection. UPGMA (unweighted pair-group method arithmetic average) analysis showed that each male and female gametophyte of a generation could be clustered into one pair separately. The genetic distances of the Kelp 901 generation were 0.321 2-0.476 7, and the maximum was between F7 and Fs (0.476 7). Identity analysis showed that F6 generation was more close to the female parent (0.659 3), and F7 generation was more close to the male parent (0.5788). To the sporophytes study in 24 selected primers for RAPD amplification, 191 loci ranging from 230-2 800 bp were obtained, in the average to each primer of 8.0 loci. The heterozygosity to six populations were male parent (0.223 9),female parent (0.107 2), F6 (0.216 4), F7 (0.228 6), F8 (0.229 6) and F9 (0.317 2). The nearest genetic distance was 0.083 5 (Fs, F9). Total heterozygosity (HT) ofF6, F7, F8 and F9 generations was 0.318 6, the average heterozygosity (Hs) for F6,F7, F8 and F9 generations was 0.248 0, and deduced coefficient of population differentiation (Gst) was 22.2%. Six sequence characterized amplified regions (SCAR) were preliminary screened through RAPD analysis. It needed to be verified in detail as they are significant for molecular marker assistance in breeding and selecting Laminaria.     

小牛煤矿晚二叠世含煤地层沉积环境与聚煤规律

小牛煤矿位于贵州省内水城矿区的格目底向斜东段北翼,含煤地层为晚二叠世龙潭组,含煤性好。通过对小牛煤矿含煤地层及其含煤性的研究,确定了研究区的沉积环境是海陆过渡相中的三角洲沉积类型,并初步建立了沉积模式,龙潭早期和晚期均有较好的聚煤作用发生并叠加,是聚煤的最佳场所,含煤性最好。     

襄城局"国土大讲堂"开讲

9月22日,襄城县国土资源局为深入学习实践科学发展观,进一步提高全县国土资源系统干部职工队伍素质,结合全县国土资源系统干部队伍实际而组织的"国土大讲堂",在该局综合楼会议大厅正式开讲.     

栾川县国土资源局廉政文化建设成效显著

几年来,栾川县国土资源局廉政文化建设常抓不惚,成效显著。自2007年9月份该局被县纪委确定为“廉政文化进机关”工作试点单位后,局党组高度重视,采取全方位、多层次、高标准、深内涵的活动方式,抓好四项工作,实现机关作风五个转变。最近,又被洛阳市纪委、监察局授予市级“廉政文化进机关”示范单位。     

荥阳市土地整理抓特色出成效

“这都是党和政府的政策好啊！这个土地整理项目不仅改善美化了俺这里的环境，还给俺带来了不少实实在在的实惠……”站在自己承包的大片良田面前，丰收后的杨振兴感慨万千。     

准确把握中央和省委的基本要求认真搞好教育实践活动--在省国土资源厅深入开展党的群众路线教育实践活动动员大会上的讲话（摘要）

一、准确把握好中央和省委的基本要求
　　（一）中央的主要精神
　　1.贯彻“照镜子、正衣冠、洗洗澡、治治病”的总要求。“照镜子”主要是学习和对照党章、对照廉政准则、对照改进作风要求、对照群众期盼、对照先进典型,摆问题、找差距、明方向;“正衣冠”主要是正视问题、改正缺点,端正行为、维护形象,把自身问题整改好;“洗洗澡”主要是听取意见、自我批评、相互批评,除思想之尘、祛行为之垢,增强自我净化、自我完善、自我革新、自我提高能力;“治治病”主要是对症下药、治病救人,把存在的突出问题解决好。