南堡凹陷南部物源古近系沙一段沉积特征

通过沉积构造、岩石类型、粒度、测井特征等分析,认为南堡凹陷南部物源古近系沙一段主要发育辫状河三角洲前缘沉积,主要沉积微相类型为水下分流河道、水下分流河道侧缘、水下分流间湾、河口坝,并局部发育深水滑塌浊积扇、滨浅湖滩坝微相以及滨浅湖沉积。其中:水下分流河道砂体在平面上多呈条带状、片状分布;河口坝及滨浅湖滩坝在平面上主要呈椭圆状、土豆状或不规则状分布在水下分流河道的末端;水下分流河道侧缘在河道主体边侧呈条带状、席状分布;深水滑塌浊积扇主要呈不规则状分布在边界处或者河道砂体之外,整体呈现出辫状河三角洲前缘与滨浅湖的沉积组合,其物源来自南西方向。断裂、古地貌及物源供给方式是影响南堡凹陷南部物源沉积相发育及分布的重要因素。

准中部4区块侏罗系头屯河组南部物源条件分析

准中4区块侏罗系头屯河组南部物源主要提供以中-高级变质岩为主的物源,包括一些火山岩和沉积岩物源。南部三工河剖面头屯河组粗相带、工区内砂岩岩屑、重矿物特征及地震特征表明南部物源是研究区重要的沉积物源之一,但是对准中4区块影响范围相对有限,最大影响范围在研究区的东南部D6-D7井附近,而且范围逐渐缩小,头屯河组上段和齐古组沉积期南部物源难以进入准中4区块。

南堡凹陷南部物源区东营组沉积相分析

南部物源区位于南堡凹陷南部缓坡带,是重要的潜在油气勘探区。通过对岩芯、测井和录井资料的分析,认为南堡凹陷南部物源区东营组整体发育一套辫状河三角洲相、湖泊相和深水浊积相沉积组合,可识别出水下分流河道、水下分流河道间湾、河口坝、远砂坝、深湖—半深湖泥等沉积微相。沉积相在空间上的展布受控于物源供给、古地貌和同沉积断裂。辫状河三角洲前缘呈裙带状连片展布,面积最广,深水浊积扇分布范围相对局限,仅发育在辫状河三角洲前缘前方局部深水区。

大庆长垣以西地区黑帝庙油层存在南北双向物源

通过对松辽盆地北部大庆长垣以西地区嫩江组二、三段沉积相特征、砂体分布特征及嫩江组三段生物相、嫩江组三段重矿物组合特征等进行研究,确定黑帝庙油层砂体分布受南、北双向物源的控制,主要存在来自泰康以东地区的北部物源及来自茂兴地区的南部物源。

鄂尔多斯盆地南部长探1井上古生界勘探突破及意义

鄂尔多斯盆地西南缘彬长区块构造特征相对复杂,2020年中国石化在该区块部署的风险探井长探1井在上古生界上石盒子组试获工业气流,标志着盆地南缘上古生界天然气取得新层系突破,随后又有多口井在上石盒子组、下石盒子组、山西组多层试获工业气流或钻遇良好显示,表明盆地南部物源体系中构造复杂带与盆地内部陇东地区不同,上古生界呈现出多层含气。为查明盆地南缘上古生界天然气成藏模式,完善和丰富盆地南部上古生界物源体系成藏认识,通过岩性录井及地层测试、色谱—质谱分析、测井解释、地震解释及属性分析、区域地质类比等技术手段,系统开展了盆地南部彬长区块构造演化及断裂活动、上古生界煤系烃源岩特征、沉积相及储层分布、区域保存条件及天然气输导特征等成藏条件研究。研究结果表明,盆地南部上古生界具备天然气富集成藏的有利地质条件,天然气成藏表现为“多层叠置、断裂输导、下生上储、立体成藏”模式,优质储层分布及高角度断层输导两个关键因素共同决定了盆地南缘天然气富集;大型三角洲砂体厚度大、物性较好,高角度断层输导成藏的区域是下步有利的天然气勘探方向。

Collecting Landraces of Vegetable Crop Species in the South-West Romania

A collecting mission was carried out in south-west Romania in October 2013 with the aims： （1） to collect autochthonous crop genetic resources which still present in the south-west of Romania; （2） to assess the presence of on farm of plant genetic resources; （3） to determine the species and the amount of genetic diversity still cultivated and （4） to obtain information from germplasm owners to be used to evaluate the feasibility of an on farm conservation program. Out of 24 explored towns, in 8, landraces were grown and in all, instances seeds could be obtained. Fifty-three accessions from different crop species were collected in 17 sites, belonging to 10 botanical families, of which solanaceae was the most represented （32%）, followed by fabaceae （17%）, cueurbitaceae （11%） and alliaceae and brassicaceae （9%）. As expected, vegetable crops were the most collected, reaching a value as 58.5%, spices 20.8%, while pulses 15.1% and cereals 5.7% of the total. This collecting mission showed that in internal areas of Romania, germplasm of old landraces of many vegetable and crop species still survive, and indicated the urgency to continue also in other agricultural districts of Romania.

Distribution and Provenance of Detrital Minerals in Southern Coast of Shandong Peninsula

Detrital minerals of 137 offshore and 22 river sediment samples collected from Qingdao coastal areas have been analyzed. Four mineral assemblage provinces can be classified by Q-mode cluster analysis. Factor analysis identifies two major factors that account for the total variability in most common minerals: 1) based on the relationship of quartz, hornblende, actinolite, micas, and authigenic pyrite, 41.55% of the variability is related to sediment sources; 2) based on the relationship of epidote, garnet, sphere, and ilmenite, 23.21% can be related to strong hydrodynamic conditions that control transport and sedimentation. By comparing mineral compositions of river waters in the study area, the following four mineral provenances can be identified. The Qingdao-Laoshan nearshore area has a quartz-feldspar-epidote-hornblende-limenite-limonite-sphene assemblage, which is largely attributed to relict sediment and coastal erosion. The Jimo-Haiyang nearshore area has a quartz-feldspar-hornblende-epidote-limonite-mica-actinolite assemblage, derived largely from the Wulong River and Rushan River, and is also affected by the Huanghe River, while the Qianliyan Island area in the deeper offshore area separated by a mud belt has a similar assemblage. The Haiyang-Rushan nearshore area has a quartz-feldspar-hornblende-epidote-micas-limonite assemblage, indicating multiple sources from the Rushan River, the Wulong River, the Huanghe River, and coastal erosion. The central area, located in an eddy center, has a mica-authigenic pyrite-hornblende-quartz-feldspar assemblage, indicating multiple sources dominated by Huanghe River distal sediments.

Study of Camelina Biodiversity in Southwestern of Algeria

In the framework of biodiversity＇s studies of animal＇s genetic resources in general and especially camels, the authors focused, in the case of biodiversity, on the phenotypic and genetic variability of each camel populations studied in southwestern of Algeria. The objective of the present study is to describe the conditions of dromedaries breeding, to analyze their phenotypic diversity, redefine the range flocks, highlight the perspectives of exploitation and use their products in livestock systems sustainablely. Knowing that the camel occupies a vital place in the socioeconomic development of breeders, owing to the multiple functions and services it provides. However, the pressures of diverse origins including population growth and recurrent droughts take serious threats to the development of the species. This survey was conducted during 2 years over 2500 animals owned by 60 farmers were studied. These animals were analyzed in terms of phenotypic and ethno-geographical evolution of breeding. A large number of blood samples （200） were collected, which allowed us to be the first DNA bank of camels in Algeria.

Modeling the Impacts of EU Bioenergy Demand on the Forest Sector of the Southeast U.S.

The wood-pellet trade between the U.S. （United States） and the EU （European Union） has increased substantially recently. This research analyzes the effects of EU biomass imports from the Southeast U.S. on Southeast U.S. timber prices, inventories and production and on EU imports of feedstock. The SRTS （sub-regional timber supply model） was used to simulate market responses to changes in woody biomass consumption in the U.S. and the EU between 2008 and 2038. Results indicate that the price of imported wood pellets in the EU is sensitive to future U.S. renewable energy policies, the developments of which are so far uncertain. The analysis indicates that with bioenergy demands, prices increase for U.S. softwood roundwood from 25% to 125% by 2038 depending largely on U.S. domestic policy. Demand increases led to supply responses and increased carbon storage in Southeastern U.S. over time.

End member inversion of surface sediment grain size in the South Yellow Sea and its implications for dynamic sedimentary environments

Four end members were inverted from surface sediment grain size data from the South Yellow Sea by using the end member(EM) model. The sediment provenance and hydrodynamic meanings of each EM were discussed based on the frequency and spatial distributions of the EMs. EM1 and EM2 reflect the dynamic transport and sorting processes of the terrigenous sediment, and EM3 and EM4 reflect the modification of relic sand. The ocean front mainly affected transport of relatively coarse terrigenous sediment in the South Yellow Sea, and the fine terrigenous sediments were generally unaffected by the ocean front. Fine sediment could pass through the ocean front and deposit in the central South Yellow Sea under weak tidal condition to form most part of the Central Yellow Sea Mud(CYSM). The CYSM extended toward northwest and southwest. The sediment in the north part of the CYSM mainly consisted of sediment from the Yellow River(Huanghe) in the northwest, and the sediment in the southwest part of CYSM mainly consisted of Subei coastal sediments from both the Yangtze River(Changjiang) and the Yellow River. Compared to the traditional method of sediment grain size analysis, the EM model can determine the EMs and provide better explanations of the sediment provenance and dynamic regional sedimentary environment in the study area.