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泰国的侏罗系 =The Jurassic System of Thailand(英文)

泰国的侏罗系
泰国的侏罗系 =The Jurassic System of Thailand(英文)
作者:(泰)米苏克 沙金庚(编著)

图书详细信息:
ISBN:978-7-312-02545-7
定价:89.00元
版本:第一版
装帧:平装
出版年月:201008
丛书名称:第八届国际侏罗系大会地层丛书

图书简介:

         2010年8月在中国四川召开的“第八届国际侏罗纪大会”而推出的重点学术著作之一。本书扼要地介绍了侏罗系在全泰国的分布和区域对比,全面而系统地总结了泰国西部与半岛地区的海相侏罗纪和东北部的陆相侏罗纪地层、古生物化石组合、矿物共生组合及其分布规律。进行了海相与陆相侏罗系的对比(国际地层学难题之一),建立了泰国海相与陆相侏罗系对比的地层系统。依据海相与陆相的对比结果,将泰国及其周边国家的侏罗纪地层和生物群对比了起来。分析了研究区侏罗纪动物群落的古生态学和侏罗纪的古环境(包括古地理和古气候学)。在地层学和古生物学的研究基础上,讨论了研究区的构造特征及其环境意义。

前言:

ABSTRACT

  Jurassic rocks of Thailand consist of marine, brackish and non-marine aspects distributed throughout the country. Marine Jurassic rocks are well exposed in the Mae Sot, Umphang, and Phop Phra areas, less extensively near Mae Hong Son, Kanchanaburi, Chumphon, Nakhon Si Thammarat and Krabi. Generally, these rocks are unconformably underlain by Permian and Triassic rocks, and are overlain by Quaternary strata. Fourteen lithostratigraphic units are, in ascending order, defined: Pa Lan, Mai Hung, Kong Mu formations of the Huai Pong Group in the Mae Hong Son area; Khun Huai, Doi Yot, Pha De formations of the Hua Fai Group, Mae Sot area; Klo Tho, Ta Sue Kho, Pu Khloe Khi, Lu Kloc Tu formations of the Umphang Group, Umphang area; and Khlong Min Formation in the Chumphon, Nakhon Si Thammarat, and Krabi areas. Mudstones, siltstones, sandstones, and limestones are dominant lithologies in the Mae Sot, Phob Phra, Umphang, Kanchanaburi and Mae Hong Son areas; marls are found only in Mae Sot. Sequences are approximately 900 m thick (Mae Sot), 450 m thick (Umphang) and thinner elsewhere, especially the south. Based on ammonites, brackish to marine bivalves, and foraminifera, the beds are dated mainly as Toarcianearly Bajocian.
  A paleoecological analysis and depositional history of the marine Jurassic strata cropping out in the western part of Thailand are reported, based on bivalve assemblages with additional data from ammonites, brachiopods and microfossils. Generally, the benthic bivalve facies in most outcrops is rich in infaunal, semiinfaunal and epifaunal suspensionfeeders. Of these, infaunal forms dominate. The diversity of this benthic assemblage was influenced by energy level, substrate, sedimentation rate and salinity. Low to intermediate energy levels and rather soft finegrained siliciclastic substrate are proposed as factors governing faunal distribution and explaining the greater abundance and diversity of infaunal than epifaunal suspensionfeeders. There were paleoenvironmental change both in space and time, i.e. from north to south (Mae Sot to Umphang) and from Toarcian to early Bajocian. In the Toarcian, most outcrops in Umphang are dominated by benthic bivalve facies (infaunal, semi-infaunal and epifaunal associations) implying warm, shallow water (inner neritic, ?50~100 m) and oxygenated conditions except for the Mae Sot area where a deeper setting (outer neritic to possibly upper continental slope, 50~200 m) with restricted basinal anoxic conditions is favoured as indicated by the presence of Bositra. After higher energy conditions in the Toarcian, lower energy conditions with low sediment supplies prevail in the Aalenian, and the Mae Sot area was still a restricted basin. As a result of higher sea levels, the oxygen content in the basin is increased, resulting in the presence of the ammonites. By the end of the Alenianearly Bajocian, An ammonite-bivalve association (Mixed Facies A) and the presence of corals and microfauna (Mixed Facies B) are dominant but pass upwards to nearshore higher energy conditions in most areas except for restricted basin in Mae Sot. By the middle Bajocian the environment in all areas had changed from marine to non-marine
  Based mainly on 5 measured sections in the Mae Sot area, marine Jurassic rocks of the Khun Huai, Doi Yot, and Pha De formations have been selected for detailed study with the total thickness varing from 200~832 m. The sedimentary sequences of the group are analyzed in terms of lithofacies association representing the shoreface, fan-deltas, protected lagoon, intertidal, subtidal and inner to outer ramp environments with occasional carbonate platform and reef flat. The Toarcian rocks were represented by transgressiveregressive (T-R) cycles and gradually changed to the highest sea level and water depth in the Aalenian. During late Aalenian to early Bajocian, sea level was still changing to transgressive phase. After early Bajocian, the sea level was retreated from this area. The eustatic curves in this study during Toarcianearly Bajocian correspond to the global curves, but differ significantly in the Late JurassicCretaceous. In Late JurassicCretaceous, T-R phases were conversely and probably caused by local tectonic movements.
  The non-marine Jurassic rocks are widespread in the northeastern part (the Khorat Plateau), and partly in the northern, eastern, and southern portions of Thailand. In the Khorat Plateau, the rocks, more than 1,000 m thick, are represented by the Phu Kradung and Phra Wihan formations of the Khorat Group. The rocks are less extensive in the north, east, and south, respectively. Reddish brown to greyish purple sandstones, siltstones, claystones, conglomeratic sandstones and conglomerates are the main lithologies; calcrete nodules are also present in claystones only in the Phu Kradung Formation. The nonmarine Jurassic rocks are interpreted as having been deposited mostly by the meandering and braided rivers in semiarid and slightly humid conditions for the Phu Kradung and Phra Wihan formations, respectively, except for the south where lacustrine deposits dominate. Age determinations are based mainly on vertebrates, bivalves and palynomorphs indicating that the rocks are reassigned to the Jurassic-possibly Early Cretaceous.

目录:

  PREFACE

  ABSTRACT 

  Chapter 1 INTRODUCTION

  Chapter 2 PREVIOUS WORKS

  Chapter 3 REGIONAL GEOLOGIC SETTING

  Chapter 4 MARINE JURASSIC ROCKS OF NORTH—WESTERN THAILAND

  Chapter 5 MARINE JURASSIC OF PENINSULAR THAILAND

  Chapter 6 NON-MARINE JURASSIC OF NORTHERN, NORTHEASTERN,

  Chapter 7 FAUNAL ASSOCIATIONS, PALEOECOLOGY AND PALEOENVIRONMENT

  Chapter 8 MINERAL ASSOCIATION81

  Chapter 9 DETAILED LITHOSTRATIGRAPHY AND PETROGRAPHY OF THE SELECTEDAREA: IMPLICATIONS FOR DEPOSITIONAL ENVIRONMENT AND TECTONICS

  Chapter 10 CONCLUSIONS

  ACKNOWLEDGEMENTS

  REFERENCES

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