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1.
Shangyue Shen Qinglai Feng Wenqian Yang Zhibin Zhang Chonglakmani Chongpan 《中国地球化学学报》2010,29(3):255-260
On the basis of the petrographic characteristics, rock assemblages, petrochemistry, REEs, trace elements and geotectonic settings, the authors described the characteristics of continental marginal arc-volcanic rocks in the Late Permian-Early Triassic (P2-T1) volcanic rocks distributed on the eastern side of the ocean-ridge/oceanic island basalts in the Chiang Mai belt. The volcanic rock assemblage is basaltic andesite-andesite-rhyolite. The volcanic series is dominated by the calc-alkaline series, with the tholeitic series coming next. The chemical composition of the volcanic rocks is characterized by high Al2O3; the REE distribution patterns are of the LREE-enrichment rightward incline type; the large cation elements are highly enriched, and the volcanic rocks are generally enriched in U and Th and depleted in Ti, Cr and P. The petrochemical plot falls within the field of island-arc volcanic rocks, in consistency with the projected points of continental marginal arc-volcanic rocks in the Lancangjiang belt. These continental mar-ginal arc-volcanic rocks, together with ocean-ridge/oceanic island-type volcanic rocks in the Chiang Mai belt, con-stitute the ocean-ridge volcanic rock-arc magmatic rock belts distributed in pairs, indicative of eastward subduction of the oceanic crust in the Chiang Mai belt. This result is of great importance in exploring the evolution of the pa-leo-Tethys in the Chiang Mai belt. 相似文献
2.
Shangyue Shen Qinglai Feng Wenqiang Yang Zhibin Zhang Chongpom Chonglakmani 《中国地球化学学报》2010,29(4):337-342
Late Permian-Early Triassic (P2-T1) volcanic rocks distributed on the eastern side of ocean-ridge and oceanic-island basalts in the Nan-Uttaradit zone were
analyzed from aspects of petrographic characteristics, rock assemblage, REE, trace elements, geotectonic setting, etc., indicating
that those volcanic rocks possess the characteristic features of island-arc volcanic rocks. The volcanic rock assemblage is
basalt-basaltic andesite-andesite. The volcanic rocks are sub-alkaline, dominated by calc-alkaline series, with tholeiite
series coming next. The chemical composition of the volcanic rocks is characterized by low TiO2 and K2O and high Al2O3 and Na2O. Their REE patterns are of the flat, weak LREE-enrichment right-inclined type. The trace elements are characterized by the
enrichment of large cation elements such as K, Rb and Ba, common enrichment of U and Th, and depletion of Nb, Ta, Zr and Hf.
The petrochemical plot falls within the field of volcanic rocks, in consistency with the plot of island-arc volcanic rocks
in the Jinsha River zone of China. This island-arc volcanic zone, together with the ocean-ridge/oceanic island type volcanic
rocks in the Nan-Uttaradit zone, constitutes the ocean-ridge volcanic rock-island-arc magmatic rock zones which are distributed
in pairs, indicating that the oceanic crust of the Nan-Uttaradit zone once was of eastward subduction. This work is of great
significance in exploring the evolution of paleo-Tethys in the Nan-Uttaradit zone. 相似文献
3.
从岩相学特征、岩石组合、岩石化学、稀土元素、微量元素、大地构造环境等诸多方面分析清迈带洋脊/洋岛玄武岩的东侧分布的晚二叠世—早三叠世(P2—T1)火山岩认为其具有陆缘弧火山岩特征。火山岩组合为玄武安山岩-安山岩-流纹岩;火山岩系列以钙碱性系列为主,拉斑系列次之;火山岩的化学成分以高Al2O3为特征,稀土模式为轻稀土富集右倾斜型;微量元素大阳离子元素富集,普遍富U,Th亏损Ti,Cr和P;岩石化学投点均落在岛弧火山岩区,与中国澜沧江带陆缘弧火山岩投点相一致。该陆缘弧火山岩带与清迈带的洋脊/洋岛型火山岩构成了成对分布的洋脊火山岩-弧岩浆岩带,指示清迈带洋壳向东俯冲。 相似文献
4.
QingLai Feng WenQiang Yang ShangYue Shen Chongpan Chonglakmani Kitsana Malila 《中国科学D辑(英文版)》2008,51(12):1768-1775
The widespread Permian carbonate strata outcropped in northwestern Thailand are considered as the evidence for the Late Paleozoic shallow Tethys. Our investigation, however, shows that basalt can be discovered usually under the Permian carbonate sequence in Chiang Mai-Fang area, northwestern Thailand. The basalt belongs to subalkalic basalt and potassic trachybasalt. They are characterized by high P and Ti in major elements, by high content, enriching LREE, lacking δEu anomaly in rare earth elements, and by enrichment of the large ion lithophile element (LILE) (K, Rb, Ba) and high field strength element (HFSE) (Nb, Ta, Zr) in trace elements, which can be compared with the characters of the oceanic island basalt in Three Rivers (Jinsha River, Lancang River, and Nujiang River) area, southwestern China. Therefore, the Permian carbonate in the studied area was deposited on a sea-mount, rather than on a stable carbonate platform. The oceanic basin is correlated to the Late Paleozoic ocean represented by the Changning-Menglian Belt in southwestern China and they are a major basin of the Paleo-Tethyan Archipelagoes Ocean. The result indicates nonexistence of a Shan-Thai Block in the Late Paleozoic. 相似文献
5.
CHONGPAN Chonglakmani 《中国地球化学学报》2009,28(3):258-263
The oceanic island volcanic rocks in the Chiang Mai zone, northern Thailand, are usually covered by Lower Carboniferous and
Upper Permian shallow-water carbonate rocks, with the Hawaii rocks and potash trachybasalt being the main rock types. The
alkaline series is dominant with sub-alkaline series occurring in few cases. The geochemical characteristics are described
as follows: the major chemical compositions are characterized by high TiO2, high P2O5 and medium K2O; the rare-earth elements are characterized by right-inclined strong LREE-enrichment patterns; the trace element patterns
are of the upward-bulging K-Ti enrichment type; multi-component plots falling within the fields of oceanic island basalts
and alkali basalts, belonging to the oceanic island-type volcanic rocks, which are similar to the equivalents in Deqin and
Gengma (the Changning-Menglian zone) of Yunnan Province, China. 相似文献
6.
Qian Xin Wang Yuejun Feng Qinglai Zi Jian-Wei Zhang Yuzhi Chonglakmani Chongpan 《International Journal of Earth Sciences》2017,106(4):1375-1389
International Journal of Earth Sciences - Volcanic rocks are widely exposed within the Chiang Khong–Lampang–Tak igneous zone in NW Thailand. A representative rhyolite sample from the... 相似文献
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8.
Correlation of Triassic stratigraphy between the Simao and Lampang-Phrae Basins: implications for the tectonopaleogeography of Southeast Asia 总被引：4，自引：0，他引：4
Qinglai Feng Chongpan Chonglakmani Dietrich Helmcke Rucha Ingavat-Helmcke Benpei Liu 《Journal of Asian Earth Sciences》2005,24(6):777
Based on our extensive fieldwork in southwestern Yunnan and northern Thailand, followed by detailed stratigraphic and paleontological studies, we propose that the Triassic Simao Basin in Yunnan can be correlated with the Triassic Lampang–Phrae Basin in Thailand. Strata equivalent to those in the southern Lancangjiang sub-basin have not been identified in northern Thailand. We consider that during the Triassic the Simao and the Lampang–Phrae Basins belonged to the same tectonopaleogeographic unit. The orogenic belt to the east of this unit includes the Nan–Uttaradit and Ailaoshan sutures. The ‘Shan–Thai Block’ in northern Thailand, can be divided from east to west into the Sukhothai, the Inthanon, and the Shan terranes. According to tectonopaleogeographic correlation, our results support the idea that the Sukhothai Terrane, including the Lampang–Phrae Basin, belongs to the Cathaysian domain and not to Gondwana domain, and that the geosuture corresponding to the Changning–Menglian Suture in Yunnan must lie to the west of the Sukhothai Terrane in Thailand. 相似文献
9.
Myo Min Khin Khin LinDepartment of Geology University of Mandalay Mandalay MyanmarFeng Qinglai Faculty of Earth Sciences China University of Geosciences Wuhan Chongpan ChonglakmaniSchool of Geotechnology Suranaree University of Technology Na 《中国地质大学学报(英文版)》2001,12(3)
ＩＮＴＲＯＤＵＣＴＩＯＮＤｕｒｉｎｇｔｈｅｐａｓｔｔｗｏｄｅｃａｄｅｓ ,ａｍａｊｏｒｉｔｙｏｆｇｅｏｓｃｉｅｎｔｉｓｔｓｈａｖｅｒｅｇａｒｄｅｄｍａｉｎｌａｎｄＳｏｕｔｈｅａｓｔＡｓｉａａｓｃｏｍｐｏｓｅｄｏｆＧｏｎｄ ｗａｎａ ｄｅｒｉｖｅｄｔｅｒｒａｎｅｓｗｈｉｃｈｃｒｏｓｓｅｄ“Ｐａｌｅｏｔｅｔｈｙｓ”ｔｏｃｏｌｌｉｄｅｗｉｔｈｔｈｅｆｏｒｍｅｒＰａｌｅｏｅｕｒａｓｉａｎｃｏｎｔｉｎｅｎｔｉｎＬａｔｅＴｒｉａｓｓｉｃ/Ｊｕｒａｓ ｓｉｃ (Ｍｅｔｃａｌｆｅ ,1999;ＳｃｏｔｅｓｅａｎｄＧｏｌｏｎｋ… 相似文献
10.
Correlation of Tectono-Stratigraphic Units in Northern Thailand with Those of Western Yunnan (China)
Chongpan Chonglakmani School of Geotechnology Suranaree University of Technology Nakhon Ratchasima ThailandFeng Qinglai Faculty of Earth Sciences China University of Geosciences Wuhan Dieter Meischner Goettingen Center of Geosciences 《中国地质大学学报(英文版)》2001,12(3)
Ｔｈｅｃｏｒｒｅｌａｔｉｏｎｏｆｔｅｃｔｏｎｏ ｓｔｒａｔｉｇｒａｐｈｉｃｕｎｉｔｓｏｆＮｏｒｔｈｅｒｎＴｈａｉｌａｎｄｗｉｔｈｔｈｏｓｅｏｆＷｅｓｔｅｒｎＹｕｎｎａｎ (Ｃｈｉｎａ)ｉｓｓｔｉｌｌｌｉｔｔｌｅｕｎｄｅｒｓｔｏｏｄ ,ｐａｒｔｌｙｂｅｃａｕｓｅｏｆｔｈｅ ｐａｕｃｉｔｙｏｆｇｅｏｌｏｇｉｃａｌｄａｔａｆｒｏｍｔｈｅＵｎｉｏｎｏｆＭｙａｎｍａｒａｎｄｔｈｅＬａｏｓ,ａｎｄｐａｒｔｌｙｄｕｅｔｏｔｈｅｃｏｎｆｌｉｃｔｉｎｇｇｅｏｄｙｎａｍｉｃｃｏｎｃｅｐｔｓａｄｏｐｔｅｄｂｙｖａｒｉｏｕｓａ… 相似文献