Tectonic setting and coal accumulation patterns of coal-forming period of Machala Formation in Qamdo area, Qinghai-Tibet Plateau

SONG Shiyu; CAO Daiyong; MA Zhikai; PENG Yangwen; QIAO Junwei; YANG Cheng

doi:10.3969/j.issn.1001-1986.2018.01.003

Volume 46 Issue 1

Feb. 2018

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COAL GEOLOGY & EXPLORATION > 2018 > 46(1): 13-19. > DOI: 10.3969/j.issn.1001-1986.2018.01.003

SONG Shiyu, CAO Daiyong, MA Zhikai, PENG Yangwen, QIAO Junwei, YANG Cheng. Tectonic setting and coal accumulation patterns of coal-forming period of Machala Formation in Qamdo area, Qinghai-Tibet Plateau[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(1): 13-19. DOI: 10.3969/j.issn.1001-1986.2018.01.003

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Tectonic setting and coal accumulation patterns of coal-forming period of Machala Formation in Qamdo area, Qinghai-Tibet Plateau

1. College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China;
2. Aerial Photogrammetry and Remote Sensing Bureau, Xi'an 710054, China;
3. Qinghai Coal Geological Exploration Institute, Xining 810000, China

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Geological Survey Project of China Geological Survey(DD20160187)

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Received Date: February 24, 2017
Published Date: February 24, 2018

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Abstract

In order to reconstruct the original coal accumulation, this paper analyzed the geochemical characteristics of Machala Formation. The results show that the source rocks of Machala Formation include sedimentary rock from passive continental margin and granite, alkali basalt from island arc (La/Yb=10.04~15.62 μg/g; La/Th=1.33~3.17 μg/g; Hf=4.58~13.90 μg/g). The site of samples in Zr-Th, La-Th-Sc, Th-Co-Zr/10 tectonic setting discrimination diagrams also show that Machala Formation sediments were deposited in the active continental margin, which is near the continental island arc, with the characteristics of both active continental margin and continental island arc (∑REE=193.96 μg/g, LREE/HREE=6.29; δEu=0.61; La/Yb=13.17; (La/Yb)_N=8.55). Machala Formation was deposited in continent margin with shallow sea and continental-oceanic environment. The coal seams were developed in TST, and are characterized by numerous thin layers, poor continuity, and coal-accumulating centre dispersion. By the analysis on sequence stratigraphy and provenance, when Machala Formation was deposited, Lancangjiang ocean basin had subducted. Coal accumulation pattern in Machala Formation was coal-forming in garc-island basin in active continental margin. The results can both detail the evolution of Tethysintheeraly Carboniferous and reveal the occurrence regularity of coal in Qamdo.
- the Machala Formation,
- tectonogeochemistry,
- tectonic setting,
- coal accumulation patterns,
- Qinghai-Tibet Plateau,
- Qamdo area

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[1]	莫宣学. 青藏高原地质研究的回顾与展望[J]. 中国地质, 2010,37(4):841-853 . MO Xuanxue. A review and prospect of geological researches on the Qinghai-Tibet plateau[J]. Geology in China,2010,37(4):841-853
[2]	WANG Chengshan,DAI Jingen,ZHAO Xixi,et al. Outward-growth of the Tibetan plateau during the Cenozoic:A review[J]. Tectonophysics,2014,621:1-43.
[3]	谭节庆,马志凯,高科飞,等. 青藏高原北部煤系赋存的板块构造控制[J]. 煤炭学报,2016,41(2):286-293. TAN Jieqing,MA Zhikai,GAO Kefei,et al. Control effect of plate tectonics on coal measures in northern Qinghai-Tibet plateau[J]. Journal of China Coal Society,2016,41(2):286-293.
[4]	廖云君,毛晓冬,柯丹丹,等. 西藏主要含煤岩系及其成煤环境初探[J]. 华南地质与矿产,2014,30(1):41-49. LIAO Yunjun,MAO Xiaodong,KE Dandan,et al. Brief study on the coal series and its sedimentary characters in Tibet[J]. Geology and Mineral Resources of South China,2014,30(1):41-49.
[5]	四川省煤田地质工程勘察设计研究院. 西藏昌都地区煤炭资源调查评价报告[R]. 北京:中国煤炭地质总局,2003.
[6]	莫宣学,潘桂棠. 从特提斯到青藏高原形成:构造-岩浆事件的约束[J]. 地学前缘,2006,13(6):43-51. MO Xuanxue,PAN Guitang. From the Tethys to the formation of the Qinghai-Tibet plateau:Constrained by tectono-magmatic events[J]. Earth Science Frontiers,2006,13(6):43-51.
[7]	李才. 青藏高原龙木错-双湖-澜沧江板块缝合带研究二十年[J]. 地质论评,2008,54(1):105-119. LI Cai. A review on 20 years study of the Longmuco-Shuanghu-Lancang river suture zone in Qinghai-Xizang (Tibet) plateau[J]. Geology review,2008,54(1):105-119.
[8]	简平,汪啸风,何龙清,等. 金沙江蛇绿岩中斜长岩和斜长花岗岩的U-Pb年龄及地质意义[J]. 岩石学报,1999,20(4):590-593. JIAN Ping,WANG Xiaofeng,HE Longqing,et al. U-Pb zircon dating of anothosite and plagiogranite from the Jinshajiang ophiolite belt[J]. Acta Petrologica Sinica,1999,20(4):590-593.
[9]	谭岳岩,魏振声. 西藏成煤大地构造基本特征——西藏板块构造及其演化[J]. 现代地质,1989(3):331-340. TAN Yueyan,WEI Zhensheng. Basic features of coal forming geotectonics in Xizang(Tibet)-the Xizang plate tectonics and its evolution[J]. Geoscience,1989(3):331-340.
[10]	吴彦旺. 龙木错-双湖-澜沧江洋历史记录[D]. 长春:吉林大学,2013.
[11]	SHAO Lei,STATTEGGER K,GARBE-SCHOENBERG C D. Sandstone petrology and geochemistry of the Turpan basin(NW China):Implications for the tectonic evolution of a continental basin[J]. Journal of Sedimentary Research,2001, 71(1):37-49.
[12]	NANCE W B,TAYLOR S R. Rare earth element patterns and crustal evolution:Australian post-archean sedimentary rocks[J]. Geochimica et Cosmochimica Acta,1976,40(12):1539-1551.
[13]	BHATIA M R,CROOK K A. Trace element characteristics of greywacke and tectonic setting discrimination of sedimentary basins[J]. Contributions to Mineralogy & Petrology,1986,92(2):181-193.
[14]	许中杰,程日辉,王嘹亮,等. 闽西南地区晚三叠-中侏罗世沉积岩矿物和元素地球化学特征:对盆地构造背景转变的约束[J]. 岩石学报,2013,29(8):2913-2924. XU Zhongjie, CHENG Rihui, WANG Liaoliang, et al. Mineralogical and element geochemical characteristics of the Late Triassic-Middle Jurassic sedimentary rocks in southwestern Fujian Province:Constraints on changes of basin tectonic settings[J]. Acta Petrologica Sinica,2013,29(8):2913-2924.
[15]	胡培远,李才,李林庆,等. 藏北羌塘中部早古生代蛇绿岩堆晶岩中斜长花岗岩的地球化学特征[J]. 地质通报,2009, 28(9):1297-1308. HU Peiyuan,LI Cai,LI Linqing,et al. Geochemical characteristics of Early Palaeozoic plagioclase granite from ophiolitic cumulate in central Qiangtang,northern Tibet,China[J]. Geological Bulletin of China,2009,28(9):1297-1308.
[16]	ZHAI Qingguo,JAHN B,WANG Jun,et al. The Carboniferous ophiolite in the middle of the Qiangtang terrane,northern Tibet:SHRIMP U-Pb dating, geochemical and Sr-Nd-Hf isotopic characteristics[J]. Lithos,2013,168/169(3):186-199.

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