亚洲中东部岩浆岩网络状分布与塑性流动网络

亚洲中东部的岩浆岩分布具有明显的网络状特征，共轭相交的岩浆岩带构成了晚古生代、中生代和新生代不同的岩浆岩网络系统。岩浆岩网络受岩石圈下层塑性流动网络的控制，是塑性流动带剪切变形、摩擦热效应及带内介质弱化、轻化，以至促成地幔上隆和岩浆上涌的结果。根据“塑性流动－岩浆岩”网络，推测了不同地质时期大陆构造变形的驱动边界、驱动力方向和古构造应力场，并探讨了网络构造的演变等问题     

湖南境内东西走向矿脉群的地质特点及找矿方向

在湖南境内有许多东西走向和接近东西走向的矿脉，不少矿脉具有大型矿床规模，有重要的经济价值。这类矿脉（床）的分布，大都与北东走向的韧性剪切带及其派生的裂隙系统有关，沿此种剪切带及其旁侧，是今后的找矿方向。     

东北亚经济协作与图们江流域发展计划

在东北亚区域发展方向论述了经济快速增长，资源转移和区域贸易格局的特点，随着后分析了图们江地区开发的国际环境以及图们江发展计划，指出图们江开发的几种可能选择和图们江与东北亚经济协作前景，特别提出加强国与国之间的贸易具有重要意义。     

Premonsoonal water characteristics and circulation in the east central Arabian Sea

The hydrographic structure in the east central Arabian Sea during premonsoon period undergoes significant temporal change in the thermal field of upper 100 m, wherein temperature rises by about 0–5°C on an average from May to June. The major contribution in increasing the surface layer temperature comes from surface heat exchange processes, while the horizontal advective process tends to remove the heat from the upper layer. The geostrophic flow patterns are similar from May to June in the major part of the study area while in the coastal areas off Goa a southerly current sets in June in response to coastal upwelling.     

The Palaeo-Tethyan suture: A line of demarcation between two fundamentally different architectural styles in the structure of Asia

Abstract The Palaeo-Tethyan suture separates regions characterized by two fundamentally different tectonic styles in the structure of the Tethysides. North of the suture in Iran, Turkmenistan, Afghanistan, Tadjikistan, Kirgizstan, Uzbekistan, Kazakhstan and large parts of the Russian Federation and China, orogenic development is characterized by very large subduction-accretion complexes developed since the late Proterozoic. Magmatic arc axes migrated radially outwards from the 'Old Vertex of Eurasia' and consolidated the accretionary prisms into a 'basement complex' dominated by a pelitic composition. In such orogens, called the 'Turkic-type' after the dominant ethnic population of Central Asia, ophiolites are unreliable indicators of sutures, because they are present throughout the 'basement' as in-faulted shreds and rarely as nappes. By contrast, south of the Palaeo-Tethyan suture, orogeny was commonly characterized by a Sumatra- or Andean-type continental margin arc (e.g. the Transhimalaya arc) that in places became an island arc by back-arc basin rifting (e.g. the Black Sea behind the Rhodope-Pontide fragment) and later collided with an Atlantic- (as in the Himalaya) or California-type (as in the Alps) continental margin to create Alpine- or Himalayan-type orogenic belts. Turkic-type orogenic belts result from the exaggeration of the Himalayan-type as a result of the subduction of very large oceanic areas that contain great amounts of sediment. They contribute to the enlargement and also possibly the growth of the continental crust which has a composition more silicic than basalt. The Palaeo-Tethyan suture is thus a line across which the rate of continental enlargement by subduction-accretion changed dramatically.     

电磁法在工程地质勘察中的应用

本文采用有场源电磁法勘探粤东沿海广(州)深(圳)珠(海)及深(圳)汕(头)南线等高速公路工程,勘探使用美国GDP—12及加拿大EM—37电磁数据采集系统。文章论述了时间域与频率域的多种电磁法装置在桥梁、互通、遂道及软土公路工程中的地磁物理应用前提及它们的应用环境、工作效率、勘探深度等,低阻覆盖下的地质分层及断层产状性质等问题是本文探讨要点。文中例举了多种装置的电磁异常场剖面图及其曲线形态:对磨刀门桥址西江断裂的电磁异常剖面曲线形态、特征作了构造地质解释,认为该断裂系由两条主干断层组成的蠕滑断层组。上述工程地质解释结论已作为工程勘察设计依据。有的电磁异常已被工程地震及钻探证实。     

胶东地区地质体含金性的地质地球化学评价

通过分析胶东地区各地质体例 的金根率分布模型,金含量的分数维特征,金及相关元素的组合特征天南地北来评价胶来地区各地质体的含金性。结果表明：胶东群,粉子山群,玲珑型花岗岩为金的矿源岩,郭家岭型花岗岩可能即为本区的金成矿提供成矿物质又起到了“热机”的作用。     

中亚成矿域斑岩铜金成矿的地质环境问题

中亚成矿域在蒙古、乌兹别克斯坦、吉尔吉斯斯坦和哈萨克斯坦产有Oyu Tolgoi、Almalyk、Andash-Taldy Bulak、Aktogai、Kounrad等众多巨型和世界级斑岩铜金矿床,中国新疆北部斑岩铜金找矿持续重大突破令人期待。中亚成矿域大规模斑岩铜金成矿于什么地质环境?新疆北部、尤其天山斑岩铜金地质找矿持续突破的前景怎样?都是颇受关注的重大地质和找矿问题。通过广泛深入文献调研和重要矿集区实地调查研究表明,中亚构造成矿域在古亚洲洋壳俯冲增生、陆陆碰撞和后碰撞伸展等不同时期地质环境中,虽然均有斑岩铜金成矿作用发生,但古亚洲洋俯冲形成不同时期的增生岛弧是中亚斑岩铜金最为重要的成矿地质环境,大规模斑岩铜金成矿出现在洋盆演化末期、或即将关闭时的成熟岛弧环境。为什么中亚重要斑岩铜金矿床多形成于年长的成熟岛弧是值得探索的重要科学问题。新疆北部、尤其天山不同时期的岛弧发育完整,岛弧岩浆作用强烈而漫长,斑岩铜金成矿条件优越,大型-超大型铜金矿地质找矿潜力巨大,有望持续发现重要斑岩铜金矿床。     

Mapping rice-fallow cropland areas for short-season grain legumes intensification in South Asia using MODIS 250 m time-series data

The goal of this study was to map rainfed and irrigated rice-fallow cropland areas across South Asia, using MODIS 250?m time-series data and identify where the farming system may be intensified by the inclusion of a short-season crop during the fallow period. Rice-fallow cropland areas are those areas where rice is grown during the kharif growing season (June–October), followed by a fallow during the rabi season (November–February). These cropland areas are not suitable for growing rabi-season rice due to their high water needs, but are suitable for a short -season (≤3 months), low water-consuming grain legumes such as chickpea (Cicer arietinum L.), black gram, green gram, and lentils. Intensification (double-cropping) in this manner can improve smallholder farmer’s incomes and soil health via rich nitrogen-fixation legume crops as well as address food security challenges of ballooning populations without having to expand croplands. Several grain legumes, primarily chickpea, are increasingly grown across Asia as a source of income for smallholder farmers and at the same time providing rich and cheap source of protein that can improve the nutritional quality of diets in the region. The suitability of rainfed and irrigated rice-fallow croplands for grain legume cultivation across South Asia were defined by these identifiers: (a) rice crop is grown during the primary (kharif) crop growing season or during the north-west monsoon season (June–October); (b) same croplands are left fallow during the second (rabi) season or during the south-east monsoon season (November–February); and (c) ability to support low water-consuming, short-growing season (≤3 months) grain legumes (chickpea, black gram, green gram, and lentils) during rabi season. Existing irrigated or rainfed crops such as rice or wheat that were grown during kharif were not considered suitable for growing during the rabi season, because the moisture/water demand of these crops is too high. The study established cropland classes based on the every 16-day 250?m normalized difference vegetation index (NDVI) time series for one year (June 2010–May 2011) of Moderate Resolution Imaging Spectroradiometer (MODIS) data, using spectral matching techniques (SMTs), and extensive field knowledge. Map accuracy was evaluated based on independent ground survey data as well as compared with available sub-national level statistics. The producers’ and users’ accuracies of the cropland fallow classes were between 75% and 82%. The overall accuracy and the kappa coefficient estimated for rice classes were 82% and 0.79, respectively. The analysis estimated approximately 22.3?Mha of suitable rice-fallow areas in South Asia, with 88.3% in India, 0.5% in Pakistan, 1.1% in Sri Lanka, 8.7% in Bangladesh, 1.4% in Nepal, and 0.02% in Bhutan. Decision-makers can target these areas for sustainable intensification of short-duration grain legumes.