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1.
中亚地区与中国西部盆地类比及其油气勘探潜力 总被引：7，自引：2，他引：7
中国西部盆地和中亚某些含油气盆地在地质背景和石油地质条件等方面有一定的相似性,从盆地结构上看,中亚地区的盆地与中国西部盆地大多为具有不同构造属性的构造阶段,相互叠置的叠合盆地;从烃源岩发育特征来看,中下侏罗统的含煤岩系使中国西部与中亚地区烃源层有较好的可比性。勘探实践证明,无论在中亚还是在中国西部该含煤岩系是最重要的烃源层之一,但中国西部绝大多数盆地广泛发育古生界烃源岩,这无疑大大增强了中国西部盆地的生烃潜力。从储集岩特征来看,中亚地区含油气盆地以发育中—新生界储层为主,而中国西部大部分盆地不仅广泛分布中—新生界储层,具有发育古生界储集层的优势;从资源类型来看,中亚地区以天然气占有绝对优势,而中国西部除天然气外,石油资源也有良好的勘探前景。总的来看,中国西部的油气勘探潜力要优于中亚地区的大多数盆地。 相似文献
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云南新生代断陷盆地的环境地质记录 总被引：1，自引：0，他引：1
盆地的环境地质记录是从盆地的形成、发展演变、沉积物形成的地球化学与古气候环境、沉积物堆积后所经历的压实、成岩来加以研究的。除无机介质(矿物)外的有机质,在成岩压实受热过程中化学成分与结构的变化,也是盆地环境地质记录的一部分,环境地质研究的归宿是对矿产—化石燃料形成与潜能的估价,完整的研究应该包括化石燃料形成(成烃成煤)环境及成藏(保存)环境等。对云南滇西陇川、瑞丽及保山等三个新生代断陷盆地环境地质记录的研究揭示,在极其相似的盆地形成演变、沉积地球化学与古气候、成岩与成烃背景基础上,化石燃料的形成与潜能在三个盆地具有差异性;指出陇川盆地以找寻煤型气及初熟(低熟)油为主,保山盆地以寻找浅部生物成因气及煤型气为主,瑞丽盆地相对潜能较差,仅有生物气浅部产出的可能。 相似文献
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亚太地区是全球重要的油气产区和最大的油气消费市场。亚太地区155个主要沉积盆地中,已有90多个盆地内发现了油气田或有油气发现,共发现油气田约6 900个。根据地理位置及构造特征等,亚太地区可进一步分为东亚分区、东南亚分区、澳新分区和南亚分区,约有131个主要的含油气系统。本文对亚太地区不同分区的油气成藏条件(包括烃源岩、储集层、盖层、含油气系统等)进行了总体分析与高度概括。在此基础上,以成藏组合为基本评价单元,不同勘探程度盆地采用与之相适应的评价方法,对本地区各盆地的油气资源潜力进行了评价。评价结果表明:亚太地区常规总油气可采资源量为673.7×108 t油当量,占全球的6.1%,非常规油气资源类型以重油、页岩油、油页岩、页岩气、煤层气为主,非常规油气技术总可采资源量390.4×108 t当量,占全球非常规油气技术总可采资源量的6.1%。根据待发现资源结果及盆地勘探程度,近海和深海勘探是将来的勘探热点:主要勘探领域为深海和成熟盆地新层系及岩性-地层圈闭等;海相三角洲体系是寻找天然气田的重要领域;东南亚弧后盆地群新生界湖相是页岩油的有利勘探领域;澳大利亚中部克拉通盆地群泥盆系-石炭系为页岩气的有利勘探领域。 相似文献
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Cenozoic deformation within the Tien Shan of central Asia has accommodated part of the post-collisional indentation of the Indian plate into Asia. Within the Urumgi—Korla region of the Chinese Tien Shan this occurred dominantly on thrusts, with secondary strike-slip faulting. The gross pattern of deformation is of moderate to steeply dipping thrusts that have overthrust foreland basins to the north and south of the range, the Junggar and Tarim basins, respectively. Smaller foreland basins lie within the margins of the range itself (Turfan, Chai Wo Pu, Korla and Qumishi basins); these lie in the footwalls of local thrust systems. Both the Turfan and the Korla basins contain major thrusts within them; they are complex foreland basins. Deformation has progressively affected regions further into the interior of the Junggar Basin, and propagated into the interiors of the intermontane basins. No unidirectional deformation front has passed across the Tien Shan in the Neogene and Quaternary. An Oligocene unconformity may indicate the time of the onset of the Cenozoic deformation, but most of the Cenozoic molasse has been deposited after the Palaeogene. The rate of deposition in basins next to the uplifted ranges has increased since the onset of deformation. There has been at least about 80 km of Cenozoic shortening across this part of the Tien Shan. Cenozoic shortening is greater in sections of the range further west; these are nearer to the northern margin of the Indian indenter. Cenozoic compression has reactivated structures created by the two late Palaeozoic collisions that created the ancestral Tien Shan. These Palaeozoic structures have exerted a strong control over the style and location of the Cenozoic deformation. 相似文献
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DAI Shuang DAI Wei ZHAO Zhenbin LUO Junhu QIANG Lei MA Xin ZHANG Xianwen XU Jianjun 《《地质学报》英文版》2017,91(2):669-687
The Altyn Tagh Fault (ATF) is the longest, lithospheric scale and strike-slip fault in East Asia. In the last three decades, multidisciplinary studies focusing on the timing, displacement of strike-slip and growth mechanics of the ATF have made great progresses. Most studies revealed that the ATF is a sinistral strike-slip and thrust fault, which underwent multiple episodes of activation. The fault is oriented NEE with a length of 1600 km, but the direction, timing of activity and magnitude of its extension eastward are still unclear. The AFT was predominately active during the Mesozoic and Cenozoic, in relation to the Mesozoic collision of the Cimmerian continent (Qiangtang and Lhasa block) and Cenozoic collision of India with Asia. The AFT strike-slipped with a left-lateral displacement of ca. 400 km during the Cenozoic and the displacement were bigger in the western segment and stronger in the early stage of fault activation. The slip-rates in the Quaternary were bigger in the middle segment than in the western and eastern segment. We roughly estimated the Mesozoic displacement as ca. 150-300 km. The latest paleomagnetic data showed that the clockwise vertical-axis rotation did not take place in the huge basins (the Tarim and Qaidam) at both side of ATF during the Cenozoic, but the rotation happened in the small basins along the ATF. This rotation may play an important role on accommodating the tectonic deformation and displacement of the ATF. Even if we have achieved consensus for many issues related to the ATF, some issues still need to be study deeply; such as: (a) the temporal and spatial coupling relationship between the collision of Cimmerian continent with Asia and the history of AFT in the Mesozoic and (b) the tectonic deformation history which records by the sediments of the basins within and at both side of AFT and was constrained by a high-resolution and accurate chronology such as magnetostratigraphy and paleomagnetic data. 相似文献
7.
多岛海型造山作用——以华南印支期造山带为例 总被引：24，自引：1，他引：23
大陆造山带大多数形成于弧弧碰撞及其弧后盆地衰缩作用,其古地理格局为多岛海。今日的东南亚是多岛海大地构造的现实模型,其中欧亚大陆和澳大利亚的板块边界位于印度尼西亚的班达—巽它弧以南和西太平洋马里亚纳弧以东。介于前缘弧和欧亚大陆之间的是众多的残余弧和弧后盆地。其中有些盆地仍然是海底扩张的中心,一些是不再活动的海盆,也有些海盆正在遭受挤压作用,而一些海盆则已经完全被弧后衰缩作用所消减。位于这些盆地之间的是残余弧,沉降的残余弧顶部的沉积层序类似于被动陆缘。华南大地构造可用多岛海模式予以解释。华南造山带的大地构造相分析、沉积相分析和古地磁等综合研究结果表明,它们大多数是弧弧碰撞作用所形成的碰撞型造山带,二叠—三叠纪的古地理存在着与东南亚今天类似的多岛海格局。临沧弧和华夏弧可能为华南多岛海的前缘弧,起着与今天欧亚大陆的印度尼西亚弧相类似的作用。多岛海古地理格局可能出现于泥盆纪以后,华南板块发生裂解,所形成的弧后盆地大多数于晚三叠世到早侏罗世发生衰缩。 相似文献
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南海北部陆缘位于大华南地块洋陆过渡带南段的关键核心段落,曾处于特提斯洋构造域与（古）太平洋构造域交接地带,是印度洋构造动力系统与太平洋构造动力系统波及的共同地区。然而,以往研究和勘探程度较低,特提斯构造域与太平洋构造域交接转换区域的大地构造背景、过程、机制始终不够明确。基于南海北部陆缘地震剖面,不仅关注该区新生代盆地结构构造,以服务该区油气精准勘探,并且试图以此解剖、揭示该区中生代基底结构特征,进而探索新生代南海海盆打开、扩张、停滞到消亡过程的前生今世。对珠江口盆地地震剖面解析和华南陆缘野外构造研究表明:华南地块洋陆过渡带先后经历了中生代印支期碰撞造山、燕山早期增生造山、燕山晚期压扭造山三个过程;随后进入新生代,又经历了早期北东东—南西西走向正断层主控下的弥散性裂解成盆、中期北东—北北东走向张扭断裂主控下的右行走滑拉分成盆、晚期北西—北西西向张扭断裂主控下的左行走滑拉分成盆三期伸展构造叠加。总体上,该区特提斯洋构造体系向太平洋构造体系的转换过程经历了四个阶段:古特提斯洋构造体系向新特提斯洋构造体系转换、新特提斯洋构造体系向古太平洋构造体系转换、新特提斯洋构造体系向太平洋构造体系转换及古太平洋构造体系向太平洋构造体系的转换。东亚洋陆过渡带的构造转换折射出地球深浅部动力系统驱动“东亚大汇聚”的长期机制,即东南亚环形俯冲驱动体系、太平洋LLSVP和非洲LLSVP的深部动力系统（统称为海底“三极”）的重要性,其中,东南亚环形俯冲驱动体系是地球板块运动的重要动力引擎之一。 相似文献
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Palaeozoic and Mesozoic tectonic evolution and palaeogeography of East Asian crustal fragments: The Korean Peninsula in context 总被引：38，自引：2，他引：38
I. Metcalfe 《Gondwana Research》2006,9(1-2):24
East and Southeast Asia comprises a complex assembly of allochthonous continental lithospheric crustal fragments (terranes) together with volcanic arcs, and other terranes of oceanic and accretionary complex origins located at the zone of convergence between the Eurasian, Indo-Australian and Pacific Plates. The former wide separation of Asian terranes is indicated by contrasting faunas and floras developed on adjacent terranes due to their prior geographic separation, different palaeoclimates, and biogeographic isolation. The boundaries between Asian terranes are marked by major geological discontinuities (suture zones) that represent former ocean basins that once separated them. In some cases, the ocean basins have been completely destroyed, and terrane boundaries are marked by major fault zones. In other cases, remnants of the ocean basins and of subduction/accretion complexes remain and provide valuable information on the tectonic history of the terranes, the oceans that once separated them, and timings of amalgamation and accretion. The various allochthonous crustal fragments of East Asia have been brought into close juxtaposition by geological convergent plate tectonic processes. The Gondwana-derived East Asia crustal fragments successively rifted and separated from the margin of eastern Gondwana as three elongate continental slivers in the Devonian, Early Permian and Late Triassic–Late Jurassic. As these three continental slivers separated from Gondwana, three successive ocean basins, the Palaeo-Tethys,. Meso-Tethys and Ceno-Tethys, opened between these and Gondwana. Asian terranes progressively sutured to one another during the Palaeozoic to Cenozoic. South China and Indochina probably amalgamated in the Early Carboniferous but alternative scenarios with collision in the Permo–Triassic have been suggested. The Tarim terrane accreted to Eurasia in the Early Permian. The Sibumasu and Qiangtang terranes collided and sutured with Simao/Indochina/East Malaya in the Early–Middle Triassic and the West Sumatra terrane was transported westwards to a position outboard of Sibumasu during this collisional process. The Permo–Triassic also saw the progressive collision between South and North China (with possible extension of this collision being recognised in the Korean Peninsula) culminating in the Late Triassic. North China did not finally weld to Asia until the Late Jurassic. The Lhasa and West Burma terranes accreted to Eurasia in the Late Jurassic–Early Cretaceous and proto East and Southeast Asia had formed. Palaeogeographic reconstructions illustrating the evolution and assembly of Asian crustal fragments during the Phanerozoic are presented. 相似文献
10.
The Tetori Group of Japan ranks amongst the more important Upper Mesozoic strata in East Asia, with common animal and plant fossils throughout and is well suited for analyses of the links between environmental changes and the various animal and plant fossil assemblages. Three marine transgressions (i. e., Bathonian–Oxfordian, Tithonian–Berriasian and Hauterivian–Barremian in age) have been recognized in the Tetori Group, based on ammonite index taxa. These pulses are also reflected in bivalve faunas which comprise, 81 species in 65 genera (marine taxa) and 16 species in 13 genera (non-marine taxa). Many of these are considered as endemic species to the Tetori Group. In view of the fact that the occurrence of non-marine taxa was primarily controlled by environmental conditions, these do not constitute chronological indices. The faunal composition of the first marine transgressive phase is similar to that found elsewhere in southeast Asia, while that of the second one resembles both that of southeast Asia and of northeast China and Far East Russia. Assemblages of the third phase are similar to those of Heilongjiang, northeast China. Currents from the equator and high-latitudes explain these similarities. 相似文献
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对浙江天台中新统下南山组6块叶片压型化石——天台润楠Machilus tiantaiensis Ding S. T. et Sun B. N. sp. nov.,并对其叶结构和表皮构造特征进行了详细的研究.其主要特征为:叶椭圆形,全缘,顶端渐尖,基部楔形,侧脉羽状;表皮细胞垂周壁浅波状,单细胞毛基多集中于脉络区;气孔下生式,气孔器短平列型,副卫细胞1~2个.通过与现生植物进行对比分析,发现当前标本的叶结构和表皮构造特征与樟科润楠属(Machilus)十分一致.利用PAST(palaeontological statistics)软件对我国润楠属68种植物叶片的形态特征进行聚类分析,结果表明当前化石与M. pingii Cheng ex Yang最为接近;角质层分析也表明二者的表皮构造最为相似.利用化石与其现存最近亲缘种M. pingii的气孔比率,恢复了天台晚中新世的古大气CO2体积分数为407.9×10-6.此外,依据现生润楠属主要分布于亚洲东南部和南部的热带、亚热带地区,推断天台地区中新世的古气候较为温暖湿润. 相似文献
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亚洲特提斯域油气聚集地质特征 总被引：2，自引：0，他引：2
丘东洲 《沉积与特提斯地质》2007,27(2):1-8
特提斯域含油气性,特别是亚洲特提斯域油气聚集地质特征,举世瞩目。本文从亚洲特提斯域地质演化、构造单元划分着手,讨论油气地理分布、油气分布与盆地类型、油气盆地与沉积环境、油气分布与盆地保存的特点,进而对亚洲特提斯域油气富集基本因素进行总结。亚洲特提斯域含油气盆地是特提斯洋形成、演化、造山和消亡过程的沉积-构造产物,其盆地成因和赋存的油气具有特提斯固有的特色。亚洲特提斯域油气地理上主要分布于西亚段南带,其次为西亚段北带、东南亚段中带,再次为中亚段。分析发现,亚洲特提斯油气分布,就盆地类型而言,主要与前陆盆地、克拉通边缘盆地相关;就成烃物质的沉积-构造环境而言,多位于古赤道与45°古纬度之间,盆地形态主要与台地、环形坳陷、线形坳陷沉积-构造环境相关。亚洲特提斯域油气分布与盆地保存关系极为密切,盆地保存是盆地油气评价的先决条件。文章把亚洲特提斯域油气富集基本因素归纳为两点,一是盆地演化过程中具备广阔平缓、长期保持被动陆缘沉积-构造环境,二是盆地演化末期直至现今保持沉积物被埋藏、保存的状况。 相似文献
13.
Sandip More Rajarshi Rit Mahasin Ali Khan Dipak Kumar Paruya Suchana Taral Tapan Chakraborty Subir Bera 《Journal of the Geological Society of India》2018,91(3):301-306
Fossil leaf impressions and pollen grains comparable to modern Sloanea sp. of Elaeocarpaceae collected from the middle part of the Siwalik sediments (Geabdat Sandstone Formation; Pliocene) in Darjeeling foothills of eastern Himalaya are reported in the present communication. On the basis of macro morphological features, leaf remains are described as a new species Sloanea siwalika sp. nov. This is the first authentic record of the occurrence of leaf and pollen grains comparable to the genus Sloanea L. from the Cenozoic sediments of India and Asia as well. The recovery of this species and other earlier-described evergreen taxa from the same formation, suggests the existence of a tropical, warm and humid climatic conditions during the depositional period. The present study further suggests that after Pliocene the taxon might have shifted from Darjeeling Himalayan region to the adjoining southeast Asian land masses, due to possible climate change caused by post-Pliocene orogenic movement of the Himalaya. 相似文献
14.
Fossil leaflet impression described here as a new species Rourea miocaudata sp. nov., showing close resemblance with the modern leaflets of Rourea caudata Planch. (Connaraceae R. Br.), has been recorded from the lower part of the Siwalik sediments (Dafla Formation, middle–upper Miocene) exposed at the road-cutting section of Pinjoli area in West Kameng district, Arunachal Pradesh. The important morphological characters of the fossil are its narrow elliptic leaflet, cuneate base, long caudate apex, entire margin, eucamptodromous to brochidodromous secondary veins, presence of intersecondary veins, percurrent and reticulate tertiary veins and orthogonally reticulate quaternary veins. This is the first authentic record of the occurrence of leaflet comparable to R. caudata of Connaraceae from the Cenozoic sediments of India and abroad. At present R. caudata does not grow in India and is restricted only in southeast Asia especially in China and Myanmar. This taxon probably migrated to these southeast Asian regions after lower Siwalik sedimentation (middle–upper Miocene) due to climatic change caused by post-Miocene orogenic movement of the Himalaya. The recovery of this species and other earlier-described evergreen taxa from the same formation, suggests the existence of a tropical, warm and humid climatic conditions during the depositional period. 相似文献
15.
中亚与邻区盆地群构造演化及含油气性 总被引：5，自引：0，他引：5
基于中亚及其邻区大地构造和盆地构造演化,利用古板块再造、地理信息软件等对中亚盆地群的构造演化及含油气性进行探讨。中亚与邻区盆地群在早古生代分属不同陆块,这些陆块于早石炭世开始汇聚,早二叠世完成拼合,形成中亚盆地群。汇聚前该区受到海西期构造影响,在中生代伸展构造和新生代挤压构造的作用下形成的众多盆地类型为叠合盆地。该区主要烃岩源发育于海西期早期和中-新生代伸展背景的裂谷事件。油气主要集中在侏罗系(41%)和石炭系(37%)中,主要的勘探目的层是碳酸盐岩、礁灰岩、膏岩和泥岩。阿姆河、费尔干纳、图尔盖和阿富汗-塔吉克等盆地的油气主要集中于前陆冲断带和凹陷断阶带。滨里海、北乌斯丘尔特和曼各什拉克等克拉通盆地油气集中于盆地边缘的隆起带和断阶带,具有自生自储特征。 相似文献
16.
Formation of arcs and backarc basins inferred from the tectonic evolution of Southeast Asia since the Late Cretaceous 总被引：6，自引：0，他引：6
Results of the geological and geophysical surveys in the Daito ridges and basin in the northern West Philippine Basin suggest that the Daito Ridge was an arc facing toward the south from the Late Cretaceous to the Early Tertiary. The Late Cretaceous and Tertiary history of Southeast Asia is evaluated based on these data in the Daito ridges and basins and reconstructed based on overall plate kinematics that have operated in this area. During the Late Cretaceous, the Daito Ridge and the East Philippine Islands were positioned along the boundary between the Indian and Pacific Plates. The western half of the Philippines setting on the Indian Plate approached from the south and collided with the East Philippine–Daito Arc either during the latest Paleocene or the earliest Eocene. It is inferred that the bulk of the Philippine archipelago rotated clockwise and Borneo spun counterclockwise during the Tertiary.From the reconstruction, the formation of backarc basins and their spreading direction are assessed. As a result, some primary causes and significant characteristics are suggested for the opening of backarc basins in Southeast Asia. First, opening of some backarc basins commenced with or was triggered by collisions. Second, backarc basins opened approximately parallel to oceanic plate motion. Third, the formation of some backarc basins was triggered by the approach of a hot spreading center. Fourth, the spreading mode or direction of backarc basins was greatly affected by the configuration of the surrounding continent and was also rearranged to spread approximately parallel to oceanic plate motion.The formation of backarc basins and their spreading direction can be reasonably explained by plate kinematics. However, the generative force responsible for their formation is possibly within the subduction system, particularly to form horizontal tensional force in backarc side. 相似文献
17.
Matúš Hyžný Carlos S. Melo Ricardo S. Ramalho Ricardo Cordeiro Patrícia Madeira Lara Baptista A. Cristina Rebelo Cynthia Gómez Alfred Uchman Markes E. Johnson Björn Berning Sérgio P. Ávila 《第四纪科学杂志》2021,36(1):91-109
The presence of decapod crustaceans in the Pliocene and Pleistocene (MIS 5e) fossil record of Santa Maria Island (Azores Archipelago) is herein reviewed. Our study raises the number of fossil decapods from this island from one species to 10 taxa (three for the Pliocene and seven for the Last Interglacial). Four of these 10 taxa are reported for the first time in the fossil record, worldwide. A new species of a mud shrimp is also described (Upogebia azorensis n. sp.). Our study suggests that the Plio–Pleistocene decapod assemblages of the Azores did not differ significantly from modern ones, being dominated by species that are today widespread across the Webbnesia ecoregion, the Mediterranean Sea, and the eastern Atlantic shores, including the Azores. As far as can be judged from the limited fossil record, apparently no tropical crab species with a Cabo Verdean/Senegalese provenance reached the Azores during windows of opportunity associated with Glacial Termination 2 or with the initial setting of the Last Interglacial period. This contribution increases the total number of marine taxa reported for the Pliocene and Pleistocene outcrops of Santa Maria Island to 218 and 155, respectively, highlighting the scientific relevance of its palaeontological heritage. 相似文献
18.
J. Milsom 《Journal of Asian Earth Sciences》2000,18(6)
Although collision in eastern Indonesia is now accreting the Australian continent to Southeast Asia, the small North and South Banda oceanic basins within the suture zone are interpreted as Late Cenozoic extensional features. Stratigraphic columns from the surrounding islands conform to one of three generalised patterns, two of which can be related to the margins of SE Asia (Sundaland) and the Australian continent, respectively. The third system, which is dominant in the outer Banda Arc and eastern Sulawesi, is associated with a microcontinent that was rifted from Australia in the Jurassic, drifted northwards ahead of Australia in the Cretaceous and collided with the Sundaland Margin in the Paleogene. Subsequent collapse of the resulting collision orogen led to rapid extension and the formation of the Banda Sea behind the Outer Banda Arc thrust belt. Eastern Indonesia thus duplicates a pattern familiar in the Mediterranean. The Tertiary compressional structures of the region cannot be explained solely in terms of the most recent collision, which began only in the Pliocene. 相似文献
19.
The faunal associations of the uppermost Jurassic and Early Cretaceous Villar del Arzobispo, El Castellar, and Camarillas formations of the Spanish town of Galve (Maestrazgo Basin of the Iberian Range) are composed of more than fifty taxa belonging to Chondrichthyes, bony fishes, lissamphibians, mammals, and reptiles. Although the presence of turtles has been recognized in these three formations, being very abundant, the published information is limited. The detailed study of these turtles allows us to recognize at least nine taxa, several of them previously not identified in the Spanish record. These taxa correspond to stem Testudines (Solemydidae), members of Paracryptodira (Pleurosternidae), several representatives of Plesiochelyidae and taxa closely related with this clade, representatives of the stem group of Cryptodira (Xinjiangchelyidae) and members of crown Cryptodira. The chelonian fauna of Galve increases the systematic, anatomical, biostratigraphic, and paleobiogeographic knowledge on several clades, represented by taxa shared with other European regions, clades also present in Early Cretaceous sites of North America or Asia, as well as taxa exclusive of the Iberian record. 相似文献
20.
Borneo occupies a central position in the Sundaland promontory of SE Asia. It has a complex Cenozoic geological history of sedimentation and deformation which began at about the same time that India is commonly suggested to have started to collide with Asia. Some tectonic reconstructions of east and SE Asia interpret a large SE Asian block with Borneo at its centre which has been rotated clockwise and displaced southwards along major strike–slip faults during the Cenozoic due to the indentation of Asia by India. However, the geological history of Borneo is not consistent with the island simply forming part of a large block extruded from Asia. The large clockwise rotations and displacements predicted by the indentor model for Borneo are incompatible with palaeomagnetic evidence and there is no evidence that the major strike–slip faults of the Asian mainland reach Borneo. Seismic tomography shows there is a deep high velocity anomaly in the lower mantle beneath SE Asia interpreted as subducted lithosphere but it can be explained just as well by alternative tectonic models as by the indentor model. Very great thicknesses of Cenozoic sediments are present in Borneo and circum-Borneo basins, and large amounts of sediment were transported to the Crocker turbidite fan of north Borneo from the Eocene to the Early Miocene, but all evidence indicates that these sediments were derived from local sources and not from distant sources in Asia elevated by India–Asia collision. The Cenozoic geological history of Borneo records subduction of the proto-South China Sea and Miocene collision after this ocean lithosphere was eliminated, and a variety of effects resulting from long-term subduction beneath SE Asia. There is little to indicate that India–Asia collision has influenced the Cenozoic geological record in Borneo. 相似文献