阿尔金山前带东段基岩储层主要特征及评价

为了解阿尔金山前带东段基岩储层主要特征,对储层进行评价.在野外露头踏勘、岩心观察描述、薄片鉴定及相关分析测试的基础上,结合普通测井资料、成像测井资料及孔渗密实验数据等进行分析.结果表明,阿尔金山前带东段基岩储层岩性主要是岩浆岩和变质岩,岩浆岩以花岗岩为主,变质岩以片麻岩为主.储集空间类型主要包括未完全充填裂缝、溶蚀孔洞和基质微孔3类.基岩储层孔隙度介于0.004%~9.760%,平均孔隙度在1.663%~3.844%;渗透率介于最大值0.002~33.239mD,平均渗透率在0.020~3.836 mD,片麻岩类物性整体好于花岗岩类,孔隙度和渗透率之间没有明显的相关性.基岩储层主控因素包括岩性及矿物组合、古地貌、先存断裂及破碎带、后期岩浆侵入及热液作用4个方面.结合基岩储层的物性特征及形成的主控因素,建立了多因素控制的基岩储层评价标准,将储层分为好、中等、较差、差4类.评价结果表明,研究区多以Ⅱ类储层为主,主要见于花岗片麻岩,其次是花岗岩、黑云母斜长片麻岩等.东坪鼻隆、牛中-牛北斜坡可见Ⅰ类储层;尖北斜坡、牛东鼻隆、冷北斜坡多为Ⅱ类储层.      

莺歌海盆地深层超高温超高压天然气勘探新问题及对策

莺歌海盆地深层超高温超高压领域勘探面临甜点储层分布预测、高阻抗砂岩识别及含气性预测、地震"亮点"型低速泥岩甄别等诸多新的难点问题,针对这些重难点问题开展了地震沉积学、岩石物理和地球物理方法等综合研究,并结合近年勘探新资料,提出了相应对策及勘探研究技术流程.结果表明,地震沉积学理论技术指导下精细化的源汇体系分析可提高莺歌...     

赞比亚巴鲁巴铜矿床地质特征及成因初探

巴鲁巴铜矿床位于赞比亚铜带省卢安夏市罗恩－穆利亚希盆地北缘,赋存于晚元古加丹加超群下罗恩组的白云质片岩中。矿体的形态受复式向斜褶皱构造控制,呈飘带状。铜矿化主要以条带状、浸染 状、脉状及网脉状产出。地层岩性与矿物分带组合特征表明,巴鲁巴铜矿区的沉积环境由早到晚,可能经历了陆缘到滨浅海环境,同时成岩成矿环境经历了氧化到还原的变化过程。矿区地层的沉积特征和矿化密切相关,表明了两者之间存在成因关系,具典型层控矿床特 征。区域变质作用不仅改造了矿体的形态,同时也活化了早期沉积 － 成岩期所形成的部分成矿物质,形成脉状铜矿化。巴 鲁 巴 铜 矿 床 为 沉 积 － 改 造 型 层 控 铜矿床。      

Influence of salinity on the early development and biochemical dynamics of a marine fish,Inimicus japonicus

Fertilised eggs of the devil stringer(I nimicus japonicus) were incubated at different salinity levels(21, 25, 29, 33, and 37), and then the hatching performances, morphological parameters, and biochemical composition(protein, lipid and carbohydrate) of the larvae were assayed to determine the influence of salinity on the early development of I. japonicus. The tested salinity levels did not af fect the times of hatching or mouth opening for yolk-sac larvae. However, the salinity significantly influenced the hatching and survival rates of open-mouthed larvae, as well as the morphology of yolk-sac larvae. The data indicated that 30.5 to 37.3 and 24.4 to 29.8 were suitable salinity ranges for the survival of embryos and larvae of I. japonicus, respectively. Larvae incubated at a salinity level of 29 had the greatest full lengths, and decreasing yolk volume was positively correlated with the environmental salinity. With increasing salinity, the individual dry weights of newly hatched larvae or open-mouthed larvae decreased significantly. Newly hatched larvae incubated at a salinity level of 29 had the greatest metabolic substrate contents and gross energy levels, while the openmouthed larvae's greatest values occurred at a salinity level of 25. Larvae incubated in the salinity range of 33 to 37 had the lowest nutritional reserves and energy values. Thus, the I. japonicus yolk-sac larvae acclimated more readily to the lower salinity level than the embryos, and higher salinity levels negatively influenced larval growth and development. In conclusion, the environmental salinity level should be maintained at 29–33 during embryogenesis and at 25–29 during early larval development for this species. Our results can be used to provide optimum aquaculture conditions for the early larval development of I. japonicus.     

Influence of annealing conditions on impurity species in arsenic-doped HgCdTe grown by molecular beam epitaxy

Based on our previous work, the influence of annealing conditions on impurity species in in-situ arsenic (As)-doped Hg_1-xCd_xTe (x≈ 0.3) grown by molecular beam epitaxy has been systematically investigated by modulated photoluminescence spectra. The results show that (i) the doped-As acting as undesirable shallow/deep levels in as-grown can be optimized under proper annealing conditions and the physical mechanism of the disadvantage of high activation temperature, commonly assumed to be more favourable for As activation, has been discussed as compared with the reports in the As-implanted HgCdTe epilayers (x≈ 0.39), (ii) the density of V_textrmHg has an evident effect on the determination of bandgap (or composition) of epilayers and the excessive introduction of V_Hg will lead to a short-wavelength shift of epilayers, and (iii) the V_textrmHg prefers forming the V_Hg-As_Hg complex when the inactivated-As (As_Hg or related) coexists in a certain density, which makes it difficult to annihilate V_Hg in As-doped epilayers. As a result, the bandedge electronic structures of epilayers under different conditions have been drawn as a brief guideline for preparing extrinsic p-type epilayers or related devices.     

原子吸收分光光度法测定锌精矿中锌

选择Ｚｎ的非灵敏线,采用原子吸收分光光度法测定锌精矿中高含量锌。共存离子互不干扰,平均回收率为９９．８２％,对于锌精矿测定５次,其ＲＳＤ〈０．５％,该法所测结果与国家标准分析方法测定的结果相符,且较标准分析方法简便,快速,实用性强。     

中国大陆及周边地区1900年以来的地震活动特征

根据中国大陆及周边地区１９００年以来Ｍ≥６．９级地震资料,着重分析地震活动的时空分布特征。结果表明：研究区地震活动具有分区,分期特征,整个时段可划分为３个活跃期（幕）、第Ⅰ、Ⅱ活跃幕持续时间分别在３９和３２年左右,第Ⅲ活跃幕已持续了２２年,目前尚未结束,还可能延续１０－１７年左右;在时空域内,地震活动出现了分区集中和地区间的交替迁移以及平静与活跃的交替现象。每个活跃幕内,地震活动以多周期轮回的迁移     

Shoreline Change Modeling on Emergency Beach Nourishment Project on West Beach of Beidaihe, China

By use of a shoreline-change numerical model (GENESIS) based on one-line theory, a preliminary modeling study on shoreline changes caused by a beach nourishment project in Beidaihe, China, is presented in this paper. Firstly, the GENESIS model is verified and model sensitivity to the major parameter changes is discussed by simulating a hydraulic model test. The beach nourishment project, after that the shoreline change is kept being monitored, is a small-scale emergency one carried out to use two bathing places on the west beach in the summer, 2008. In this paper the shoreline changes caused by the beach nourishment project are modeled by the GENESIS model, and the computed results fit well with the measured shorelines. With the same model and parameters, a long-term performance of the project is predicted, and the result shows that the bathing places only can be suitable for bathing in 2 to 3 years without subsequence nourishment project. Therefore, it is proposed to nourish the beaches in time to keep the service life of the beach in recent years and carry out the beach nourishment project for the whole west beach as soon as possible.     

环渤海砂质岸侵蚀和海滩养护

环渤海辽冀津鲁砂质岸近几十年遭受愈来愈强烈的侵蚀,岸线平均蚀退率约1.0～2.0m/a,局部或短期可达5～8m/a。为抑制海岸侵蚀,曾采取大量修建顺岸坝、丁坝等海岸"硬工程"护岸,但引起下游岸段继续侵蚀。近年逐渐发展起来的抛沙养滩工程可以增宽和稳定海滩,至2012年底,已完成和正在进行共有13处养滩工程,包括砂岸养滩、泥岸养滩和岩岸养滩等3种类型。在不同类型的海滩上养滩,应强调不同的设计重心。环渤海各养滩工程效果比较好,促进了滨海旅游业的发展,也取得了一些设计经验,预计未来将迎来环渤海海滩养护的新高潮。