地质通报
地質通報
지질통보
GEOLOGICAL BULLETIN OF CHINA
2014年
9期
1400-1408
,共9页
卢进才%魏仙样%魏建设%牛亚卓%许海红%МИНГАНБААТАР
盧進纔%魏仙樣%魏建設%牛亞卓%許海紅%МИНГАНБААТАР
로진재%위선양%위건설%우아탁%허해홍%МИНГАНБААТАР
蒙古国南戈壁省%银额盆地%二叠系%岩性组合
矇古國南戈壁省%銀額盆地%二疊繫%巖性組閤
몽고국남과벽성%은액분지%이첩계%암성조합
South Gobi province in Mongolia%Yingen-Ejin Banner basin%Permian%Lithic associations
蒙古国南戈壁省中蒙边界地区分布多个二叠系大型-特大型煤矿,为一套以砾岩为主的粗碎屑岩和含煤系地层夹火山岩建造。银额盆地周缘地表剖面揭示,二叠系发育一套以海相沉积为主的碎屑岩+碳酸盐岩+火山岩建造。银额盆地希热哈达-赛汗桃来地区的钻井资料揭示其为一套粗碎屑岩+含煤系地层夹火山岩岩性组合,与盆地周缘地表剖面各时代地层的岩性组合均存在巨大差异,而与蒙古国南戈壁省二叠系的岩性组合特征相同。通过中蒙边界地区二叠系地层层序与岩性组合特征的对比,明确了银额盆地希热哈达-赛汗桃来地区钻井资料发现的含煤系地层时代为二叠纪,结合沉积充填特征,对银额盆地二叠纪沉积演化与沉积相平面展布有了新的认识,为银额盆地及邻区石炭纪-二叠纪构造演化的研究提供了新的证据。
矇古國南戈壁省中矇邊界地區分佈多箇二疊繫大型-特大型煤礦,為一套以礫巖為主的粗碎屑巖和含煤繫地層夾火山巖建造。銀額盆地週緣地錶剖麵揭示,二疊繫髮育一套以海相沉積為主的碎屑巖+碳痠鹽巖+火山巖建造。銀額盆地希熱哈達-賽汗桃來地區的鑽井資料揭示其為一套粗碎屑巖+含煤繫地層夾火山巖巖性組閤,與盆地週緣地錶剖麵各時代地層的巖性組閤均存在巨大差異,而與矇古國南戈壁省二疊繫的巖性組閤特徵相同。通過中矇邊界地區二疊繫地層層序與巖性組閤特徵的對比,明確瞭銀額盆地希熱哈達-賽汗桃來地區鑽井資料髮現的含煤繫地層時代為二疊紀,結閤沉積充填特徵,對銀額盆地二疊紀沉積縯化與沉積相平麵展佈有瞭新的認識,為銀額盆地及鄰區石炭紀-二疊紀構造縯化的研究提供瞭新的證據。
몽고국남과벽성중몽변계지구분포다개이첩계대형-특대형매광,위일투이력암위주적조쇄설암화함매계지층협화산암건조。은액분지주연지표부면게시,이첩계발육일투이해상침적위주적쇄설암+탄산염암+화산암건조。은액분지희열합체-새한도래지구적찬정자료게시기위일투조쇄설암+함매계지층협화산암암성조합,여분지주연지표부면각시대지층적암성조합균존재거대차이,이여몽고국남과벽성이첩계적암성조합특정상동。통과중몽변계지구이첩계지층층서여암성조합특정적대비,명학료은액분지희열합체-새한도래지구찬정자료발현적함매계지층시대위이첩기,결합침적충전특정,대은액분지이첩기침적연화여침적상평면전포유료신적인식,위은액분지급린구석탄기-이첩기구조연화적연구제공료신적증거。
There are lots of Permian large-superlarge coal mines in South Gobi province of Mongolia along the border area between China and Mongolia, and the strata are composed of coarse clastic rocks dominated by conglomerate and coal-bearing beds intercalat-ed with volcanic rocks. Besides, Permian strata around Yingen-Ejin Banner basin comprise a suite of littoral facies deposits, which are mainly clastic rocks, carbonate rocks and volcanic rocks. Drilling data obtained from Xirehada-Saihantaolai area in Yingen-Ejin Ban-ner basin revealed that there is a set of coarse clastic rock and coal-bearing beds intercalated with volcanic rocks, which are remark-ably different from lithic associations of each era in the periphery of Yingen-Ejin Banner basin but are consistent with the characteris-tics of Permian lithic associations in South Gobi province, Mongolia. Based on the comparisons of characteristics of Permian strati-graphic sequences and lithic associations along the border area between China and Mongolia and the study of stratigraphic ages of coal-bearing strata discovered by drilling in Xirehada-Saihantaolai area, the authors assign the Yingen-Ejin Banner basin to Permian. Combined with the characteristics of sedimentary sequences, the authors have gained a better understanding of the Permian sedimen-tary evolution and the planar distribution features of sedimentary facies, which provides some new evidence for the research on Car-boniferous-Permian structural evolution in Yingen-Ejin Banner basin and its vicinities.