藏东南错那县麻玛沟角闪岩相石榴辉石岩成因研究

在藏东南错那县西南约20km的麻玛沟中发现了呈透镜体产出于石榴石矽线石片麻岩中的石榴辉石岩,其矿物组合为石榴石 透辉石 石英 铁角闪石 磁铁矿,并含有锆石、磷灰石等副矿物。石榴石呈他形产出,以铁铝榴石和钙铝榴石端员组分为主,贫镁铝榴石组分,并具成分环带:核部相对富铁铝榴石分子,贫镁铝榴石分子,而边部则相反。透辉石同样富铁、贫镁,Fe2 /(Fe2 Mg)比值一般大于0.6。铁角闪石呈熔蚀状被透辉石和石榴石所包裹,或产出于自形的透辉石颗粒之间,以贫钛为特征。该岩石的全岩成分以SiO2(59%～61%)、Fe2O3(全铁)(18%～19%)、CaO(12%～13%)和Al2O3(5.3%～5.4%)为主。运用石榴石-单斜辉石温压计估算出该岩石石榴石与透辉石的平衡温压条件分别为650～700℃、0.8～1.0GPa。这些特征表明该石榴辉石岩很可能系富铁的斜长角闪岩在中地壳尺度发生脱水所形成的残余。本文研究提供了一个角闪岩相石榴辉石岩的实例。     

The Econometric Assessment of Losses Caused by Water Pollution in Chongqing, Southwest China

As an important industrial city, Chongqing has experienced rapid economic growth in recent years, but at the same time the growth has been accompanied by serious pollution problems. Water quality monitoring shows that the waters of Chongqing are widely polluted. In this paper, the human capital approach is applied to assessing the economic losses and damages caused by water pollution in Chongqing. Based on previous studies and empirical investigations,water pollution-induced damage can be categorized into two general types: damage to ecosystems, including agriculture; and damage to non-ecosystems, including industry. The economic loss estimation of each type of the damage is conducted by taking into account a group of relevant parameters and methods.     

Early Cretaceous megaspore assemblages from southeastern Australia

Twenty-nine megaspore species including six new taxa (Bacutriletes otwayensis sp. nov.,Erlansonisporites cerebrus sp. nov., Erlansonisporites decisum sp. nov., Hughesisporites coronatus sp. nov., Hughesisporites dettmanniae sp. nov., and Verrutriletes depressus sp. nov.) are documented from Aptian and Albian strata of the Gippsland and Otway basins, southeastern Australia. Together with six taxa known only from underlying Neocomian strata, these megaspores are used to establish four provisional biozones for the Lower Cretaceous that complement existing biostratigraphic schemes based on miospores and plant macrofossils. Megaspores are best represented in silty floodbasin facies and it is likely that the parent plants predominantly occupied moist understorey to fully aquatic habitats on the floodplain. Megaspores are sparsely represented in most other fluvial facies chiefly due to reworking of floodbasin sediments into higher energy channel and crevasse deposits. The relatively high diversity of lycophyte and fern megaspores contrasts with the scarcity of these plant groups in macrofossil assemblages. The megaspore record suggests that heterosporous cryptogams may have been significantly more prominent in the vegetation of this region than previously suggested. Several megaspores from southeastern Australia are closely comparable to forms from India and Argentina indicating broad similarities between Early Cretaceous heterosporous fern and lycophyte communities across Gondwana. These similarities also suggest that megaspores may be useful for inter-continental biostratigraphic correlation.     

重庆市区企业的扩散及与库区企业空间整合模式

在实地调研基础上，对重庆市区企业的空间扩散行业模型、过程及效果进行了分析。近期，市区企业外扩散的产业主要集中在汽车和摩托车配件类企业、食品和饲料类企业以及纺织和服装类企业。空间扩散范围近期以市区近郊为主，中期以市区周边县区和中等城市为主，远期则不断向三峡库区县区发展。在企业空间扩散分析基础上，重点就重庆市区企业对库区企业的空间整合模式进行了研究，并对不同的模式作了分析和探讨。最后，提出了重庆市区企业对库区企业搬迁和重组的具体思路。     

重庆巫山张家湾遗址2000年来的环境考古

通过对重庆巫山张家湾西汉遗址T911剖面进行粒度、磁化率等环境替代指标的分析研究，结果表明，汉代该区发达的农业、手工业生产使人们盲目砍伐树木，使该区植被严重退化，使生态环境恶化，降水集中、坡地表面松散沉积丰富、缺乏植被保护等使流水侵蚀、坡地径流发育，导致水土流失严重，该区的人类文明因此而衰落，同时研究发现，该区在竺可桢划分的中国4次温暖期与4次寒期扣的第2次寒冷期（公元初至公元600年）仍为温暖期，这是由于该区西北面与东南面均有高大山脉包围，一定程度上阻挡了来自北方的冷空气进入本区的缘故，该区气候演变在一定程度上可能受西南季风的影响，至少该区在汉代气候演变与西南季风的强弱有某种相关关系，作为一个相对独立的气候变化单元，研究其气候变化与人类文明发展的耦合关系具有重要的理论意义与实际意义。     

重庆城市地貌研究的设计与实践

介绍了重庆城市地貌研究的设计与实践。认为:宜以城市的建成区和边缘区为重点研究区,并根据城市地貌环境的特点来进行设计。从以下几个方面介绍了重庆城市地貌研究的实践:(1)地貌环境对城市的影响;(2)城市对地貌环境的影响;(3)城市地貌灾害;(4)城市地貌分类与制图;(5)城市地貌环境的质量评价。     

念青唐古拉山南东麓断层的初步研究

念青唐古拉山南东麓断层位于尼木、当雄、谷露一带,长240km,总体走向NE,倾向SE,由力学性质、运动方式不同的三大段构成。晚第四纪以来,该断层强烈活动,目前能比较确定的活动次数至少有6—7次;断层切断一系列地质、地貌体,留下了丰富的位移现象;晚第四纪以来,平均水平滑动速率4.2mm/a、垂直滑动速率3.5mm/a。沿断层观察到多次古地震和历史地震的地表破裂;现今地震震中主要位于该断层附近,等震线的长轴方向也与该断层的走向一致。表明该断层是青藏高原内部一条强烈活动的发震断层。