印尼加里曼丹岛东部主要含油气盆地油气富集差异

为加强印尼加里曼丹岛东部地区战略选区研究,指明选区方向,从分析已发现油气分布规律入手,重点探讨了油气分布的控制因素,分析了低勘探程度区勘探潜力。研究表明:(1)陆上和海上分别受控于始新统和中新统三角洲煤系烃源岩,烃源岩类型、成熟度和规模共同控制油气发现"海多陆少、中部为气、南北为油"格局;(2)烃源岩和输导体系是控制油气成藏和分布的两个关键因素,海上和陆上输导体系的差异控制了海陆油气发现,表现为"陆老海新"特征;(3)海上北部达拉根盆地"近源逆冲断裂带"与陆上南部巴里托盆地南部"基底潜山带",石油地质条件优越,勘探潜力较大。     

加里曼丹岛和马来半岛中生代岩相古地理特征及其构造意义

印支运动以后,在现今的南海及其周围存在过2个古海洋,其中晚侏罗世一早白垩世消失于南海北部陆缘区、北巴拉望-礼乐滩-南沙地块以北的古海洋为“中特提斯”,而早第三纪期间消失于南沙地块以南沙捞越一带的古海洋为“古南海”。它们的结束时间和消失的古地理位置完全不同。对它们的正确识别和区分,对目前进行的南海周边地区中一新生代构造演化研究极为重要。对马来半岛、加里曼丹岛中生代岩相古地理资料的整理和分析结果支持如下结论：中特提斯洋的延伸是从苏门答腊的Woyla缝合线,过婆罗洲的Meratus缝合线。然后绕西南婆罗洲地块至加里曼丹岛的西北(Lupar带或者Boyan带),进入南海西南角(南沙-礼乐滩-北巴拉望地块等以北),再接南海北部陆缘区内的中特提斯缝合线。该区中生代海相地层的分布明显受构造演化的控制,整体趋势是向南退缩。印支运动以前、早-中三叠世的海侵广泛分布于古特提斯带及以南地区,涉及华南,中南地块,马来半岛及以南地区;印支运动基本结束了古特提斯带的海侵,因此晚三叠世一早侏罗世的海侵主要限于中特提斯海域及以南地区,如与中特提斯洋相邻的陆域,包括华南的湘赣粤海湾晚三叠世一早侏罗世的海侵、中南半岛东南部早侏罗世的海侵以及新加坡早侏罗世的海相地层。白垩纪海相地层主要分布于中特提斯以南地区,如加里曼丹岛。     

A plate tectonic model of the Palaeozoic tectonic history of New South Wales

A major phase of igneous activity of Late Oligocene to Early Miocene age affects West Kalimantan and Sarawak in northwest Borneo. The suite of igneous rocks, intruded as stocks, sills and dykes, ranges in composition from diorite to granite, the majority being granodiorite, and has geochemical characteristics similar to I‐type granitoids. The locus of magmatic activity was in the thickest part of Late Cretaceous and Early Tertiary sedimentary basins. The age of magmatism, its tectonic position and geochemistry suggest that it is related to deep crustal re‐melting and intrusion in a passive, postsubduction environment.     

Analyzing CO2 concentration changes and their influencing factors in Indonesia by OCO-2 and other multi-sensor remote-sensing data

We used OCO-2 products and considered three factors that potentially affect CO₂ concentration in Indonesia: sea surface temperature (SST), forest fires and vegetation. From 2014 to 2016, CO₂ concentration in Indonesia showed a trend of increase, which is consistent with the global increase reported by the Greenhouse Gases Observing Satellite (GOSAT) Project. As an archipelago country, the results indicate that SST has a direct effect on the CO₂ concentration in Indonesia. Their changing exhibits similar fluctuations; meanwhile, CO₂ concentration and SST also presented positive correlation. In 2015, the number of fire hotspots suddenly increased to 140,699, because of occurrence of the worst forest fire. Due to special geographic conditions, forest fires did not induce CO₂ concentration changes in Indonesia, but CO₂ concentration in the corresponding islands showed a trend of increase. CO₂ concentration increased in Kalimantan during the occurrence of forest fire in September–October 2014, and CO₂ concentration increased in Kalimantan and Sumatra during the occurrence of forest fire in September–October 2015. Vegetation indices were stable and presented no correlation with CO₂ concentration. This study demonstrated that OCO-2 is capable of monitoring CO₂ concentration at a regional scale; additionally, an effective method for using OCO-2 Level 2 products is proposed.     

加里曼丹及邻区壳体的运动与演化

加里曼丹岛位于西太平洋东南亚陆缘构造-岩浆活动带,是自中新生代以来地球岩石圈最复杂的构造活动区之一。本文通过对区域地壳的基底及深部构造、地幔流应力场、最大主应力场、大地热流等地球物理特征资料的分析基础上,对加里曼丹岛及邻区的地壳性质与结构、大地构造运动与演化作了较详细的分析。认为东南亚陆缘壳体大致形成于中晚三叠世,同时对加里曼丹地区的大地构造分区进行了划分,讨论了该区大地构造运动-演化特征。     

东南亚北加里曼丹新生代碰撞造山带演化与成矿

在确定出北加里曼丹大地构造单元的基础上,结合分析其内新生代岩浆岩性质及其大地构造环境,认为新生代北加里曼丹是卢卡尼亚(Luconia)陆块和巽他陆块碰撞的造山带,并提出"北加里曼丹新生代碰撞造山带"的概念.该造山带经历了边缘造山带-内部造山带-边缘造山带相继转化的过程,它控制了加里曼丹的区域成矿作用,特别是晚渐新世-中中新世北加里曼丹内部造山带的逆冲叠瓦阶段是加里曼丹区域成矿的最重要时期.