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Frontiers of Earth Science 2013年第4期7卷 508-521页

作者： Xin QIAN Qinglai FENG Chongpan CHONGLAKMANI denchok monjai State Key Laboratory of Geological Process and Mineral Resources China University of Geosciences Wuhan 430074 China School of Geotechnology Suranaree University of Technology Nakhon Ratchasima 30000 Thailand

Volcanic rocks in northwestern Thailand exposed dominantly in the Chiang Khong area, are commonly considered to be genetically linked to the tectonic evolution of the Paleo-Tethyan Ocean. The volcanic rocks consist mainly of andesitic to rhyolitic rocks and are traditionally mapped as Permian-Triassic sequences. Our zircon U-Pb geochronological results show that two andesitic samples （TL-1-B and TL-31-B）, are representative of the Doi Yao volcanic zone, and give a mean weighted age of 241.2-＋-4.6 Ma and 241.7-＋-2.9 Ma, respectively. The rhyolitic sample （TL-32-B1） from the Doi Khun Ta Khuan volcanic zone erupted at 238.3＋3.8 Ma. Such ages indicate that Chiang Khong volcanic rocks erputed during the early Middle Triassic period. Seven samples from the Doi Yao and Doi Khun Ta Khuan zones exhibit an affinity to arc volcanics. Three rhyolitic samples from the Chiang Khong area have a geochemical affinity to both arc and syn-eollisional volcanic rocks. The Chiang Khong arc volcanic rocks can be geochemically compared with those in the Lampang area in northern Thailand, also consistent with those in Jinghong area of southwestern Yunnan. This indicates that the Chiang Rai arc-volcanic zone might northwardly link to the Lancangjiang volcanic zone in southwestern China.

关键词： volcanic rocks geochemistry zircon U-Pb age early Middle Triassic Chiang Khong northwestern Thailand

Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area,NW Laos

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Journal of Earth Science 2016年第3期27卷 365-377页

作者： Xin Qian Qinglai Feng Yuejun Wang Wenqiang Yang Chongpan Chonglakmani denchok monjai State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China School of Earth Sciences China University of GeosciencesWuhan 430074China School of Earth Science and Geological Engineering Sun Yat-sen UniversityGuangzhou 510275China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China Wuhan Center of Geological Survey Wuhan 430205China School of Geotechnology Suranaree University of TechnologyNakhon Ratchasima 30000Thailand

The volcanic rocks from the Sayabouli area in northwestern Laos have been poorly studied. These volcanic rocks are traditionally mapped as the Permian–Early Triassic sequences on the geological map. One basaltic-andesite from the Sayabouli area yields a zircon U-Pb age of 237.7±1.7 Ma, suggesting a Middle Triassic origin. All basalt and basaltic-andesite samples from the Sayabouli area show depletions in HFSEs（e.g., Nb, Ta, Ti） and have high LILE/HFSE ratios, and exhibit the geochemical affinity to the continental arc volcanic rocks and are geochemically similar to the continental arc volcanic rocks from the Phetchabun belt in northeastern Thailand, suggesting a Late Permian–Middle Triassic continental margin in the Sayabouli area of northwestern Laos and Phetchabun area of northeastern Thailand. Our data indicate that the Phetchabun arc volcanic belt through the western Loei sub-belt can be linked to the Sayabouli area in northwestern Laos.

关键词： volcanic rock geochemical characteristics zircon U-Pb age Middle Triassic Sayabouli northwestern Laos

泰国清莱地区三叠纪南邦群碎屑锆石LA-ICP-MSU-Pb年龄及其地质意义

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地质通报 2014年第7期33卷 995-1007页

作者：高海龙冯庆来聂小妹 CHONGLAKMANI Chongpan monjai denchok 中国地质大学地质过程与矿产资源国家重点实验室湖北武汉430074 School of Geotechnology Suranaree University of Technology

对于中国滇西和东南亚地区古特提斯缝合带对比一直存在诸多争议。在泰国清莱地区三叠纪南邦群中采集4件碎屑岩样品,进行岩石学、地球化学和锆石U-Pb测年研究。岩石学和地球化学研究表明,该套碎屑岩的源岩主要为基性—中基性岩石,卷入少... 详细信息

对于中国滇西和东南亚地区古特提斯缝合带对比一直存在诸多争议。在泰国清莱地区三叠纪南邦群中采集4件碎屑岩样品,进行岩石学、地球化学和锆石U-Pb测年研究。岩石学和地球化学研究表明,该套碎屑岩的源岩主要为基性—中基性岩石,卷入少量长英质岩石,物源区大地构造背景为岛弧带。所测得最古老锆石U-Pb同位素年龄为3269Ma±29Ma,绝大多数年龄集中形成3个峰值：280～250Ma、500～440Ma和1200～1100Ma,指示清莱地区三叠纪南邦群碎屑物源区主要为清莱岛弧火山岩带西部条带和前泥盆纪变质岩系。碎屑锆石年龄图谱的对比结果表明,原特提斯构造阶段之前,南邦地体与西澳大利亚发育类似构造—热事件;在原特提斯构造阶段之后,其构造—热事件特征与扬子构造域相类似,指示古特提斯洋的主洋盆应该在南邦地体以西,支持清迈构造带代表古特提斯主洋盆的观点。

关键词：碎屑锆石U-Pb年龄清莱岛弧火山岩带物源分析古特提斯演化缝合带

泰国北部清孔地区弧火山岩锆石U-Pb年龄及其地质意义

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地球科学（中国地质大学学报） 2012年第S2期37卷 195-203页

作者：钱鑫韦红王岳军 Chongpan Chonglakmani denchok monjai 冯庆来中国地质大学地质过程与矿产资源国家重点实验室湖北武汉430074 中国科学院广州地球化学研究所广东广州510640 School of Geotechnology Suranaree University of Technology

泰国北部清孔地区存在着大量的火山岩,前人将其划归二叠纪-三叠纪.运用LA-ICP-MS的方法,对清孔地区代表性的火山岩进行了锆石U-Pb年代学研究.其中Doi Yao带玄武质安山岩TL-1-B和TL-31-B锆石年龄分别为241.1±6.9Ma和241.1±3.9Ma,Doi Kh... 详细信息

泰国北部清孔地区存在着大量的火山岩,前人将其划归二叠纪-三叠纪.运用LA-ICP-MS的方法,对清孔地区代表性的火山岩进行了锆石U-Pb年代学研究.其中Doi Yao带玄武质安山岩TL-1-B和TL-31-B锆石年龄分别为241.1±6.9Ma和241.1±3.9Ma,Doi Khun Ta Khuan带流纹岩TL-32-B1锆石年龄为238.0±8.9Ma,三者均为中三叠世早期.这组U-Pb同位素年龄与云南景洪地区和泰国南邦地区的弧火山形成年龄相近,指示泰国北部清莱弧火山岩带从南邦地区,经清孔地区,向北延伸到了景洪地区的澜沧江弧火山岩带.另外,研究区还发现(1885±16～1323±13)Ma的U-Pb同位素年龄,表明该区存在古元古代-中元古代的基底.

关键词：弧火山岩锆石U-Pb年龄中三叠世早期地质年代学泰国北部

老挝与云南二叠纪三叠纪地层对比及其构造意义

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地球科学（中国地质大学学报） 2012年第S2期37卷 73-80页

作者：钟维敷冯庆来 Chongpan Chonglakmani denchok monjai 张志斌中国地质大学地质过程与矿产资源国家重点实验室湖北武汉430074 云南省地质调查局云南昆明650011 School of Geotechnology Suranaree University of Technology

在老挝北部地区目前仍没有建立起地层格架,以致无法探讨其演化历史,无法与邻区开展区域构造带对比研究.为此,近3年来,在老挝北部沿公路进行了区域地层学调查研究,发现其上二叠统含煤碎屑岩系能够与思茅盆地羊八寨组对比、中二叠统碎屑... 详细信息

在老挝北部地区目前仍没有建立起地层格架,以致无法探讨其演化历史,无法与邻区开展区域构造带对比研究.为此,近3年来,在老挝北部沿公路进行了区域地层学调查研究,发现其上二叠统含煤碎屑岩系能够与思茅盆地羊八寨组对比、中二叠统碎屑岩系能够与思茅盆地拉竹河组对比、黑色薄层灰岩系能够与思茅盆地中三叠统臭水组对比,浅灰色白云质灰岩系能够与思茅盆地中三叠统大水井山组对比.所以,在老挝北部地区,琅勃拉邦构造带与清莱构造带之间分布的地层能够很好地与滇西南哀牢山及澜沧江构造带之间的景谷地层系统对比.证明泰国北部难河构造带不可能穿过老挝北部地区与澜沧江构造带相连接.

关键词：地层对比构造带锆石U-Pb年龄二叠纪-三叠纪老挝北部地层学