晚白垩世西峡盆地地震滑塌岩块的发现及意义
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摘要
以大量的野外工作为基础,辅以地球化学研究,确定了西峡盆地普遍存在地震滑塌岩块,并可分为同沉积期和成岩期2种,同沉积期地震滑塌岩块主要表现为同沉积小断裂、同沉积变形构造等;成岩期地震滑塌岩块主要表现为沿断裂的上盘砾岩的"涂抹"和成岩期的方解石擦磨晶体,以及由断裂(裂隙)所围限的不同于周围岩性的块体.对地震滑塌岩块的研究不仅可以为恐龙蛋的埋藏作用提供信息,而且也可以为研究古地理和古构造背景提供参考.
Based on a large amount of field work,supplemented by geochemical studies,it determined that the seismic slump rock block widely exists in Xixia Basin,which can be divided into synsedimentary and diagenetic phase.The synsedimentary seismic slump rock block mainly manifested syndepositional faults and synsedimentary deformation structure;the diagenetic period of seismic rock mass slump mainly manifested conglomerate's"smear"phenomenon along the hanging wall of faults,diagenetic phase of calcite crystals rub wear and the block confining by a fault(fracture) which is different from the surrounding rock.The study of the seismic slump rock block can not only provide information for the dinosaur eggs buried,but also for the researches of paleoearthgqacke and ancient tectonic setting.
Based on a large amount of field work,supplemented by geochemical studies,it determined that the seismic slump rock block widely exists in Xixia Basin,which can be divided into synsedimentary and diagenetic phase.The synsedimentary seismic slump rock block mainly manifested syndepositional faults and synsedimentary deformation structure;the diagenetic period of seismic rock mass slump mainly manifested conglomerate's"smear"phenomenon along the hanging wall of faults,diagenetic phase of calcite crystals rub wear and the block confining by a fault(fracture) which is different from the surrounding rock.The study of the seismic slump rock block can not only provide information for the dinosaur eggs buried,but also for the researches of paleoearthgqacke and ancient tectonic setting.
引文
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[9]ATILLA AYDIN,RAMIL AHMADOV.Bed-parallel compaction bands in aeolian sandstone:Their identification,characterization and implications[J].Tectonophysics,2009,479:277-284.
[10]冯伟民,郑永飞,周建波.大别-苏鲁造山带大理岩碳氧同位素地球化学研究[J].岩石学报,2003,19(3):468-478.
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[13]李艳芳,蔡厚安,梁汉东,等.西峡晚白垩世恐龙蛋化石宏观矿物组成研究及意义[J].吉林大学学报:地球科学版,2006,36(2):158-168.
[2]张国成,郭卫星,曾玉凤.河南西峡盆地上白垩统河流及湖泊沉积中的遗迹组构[J].古地理学报,2004,6(4):434-441.
[3]宋慧波,胡斌,王德有,等.河南西峡盆地上白垩统高沟组沉积特征与沉积环境[J].石油地质与工程,2008,22(4):1-6.
[4]梁定益,聂泽同,宋志敏,等.正在萌芽段的震积地层学[J].高校地质学报,1997,3(4):458-561.
[5]SELIACHER A.Fault-graded bed interpreted as seismites[J].Sedimentology,1969,13(1/2):155-159.
[6]乔秀夫.中国震积岩的研究与展望[J].地质论评,1996,42(4):317-320.
[7]袁静.中国震积作用和震积岩研究进展[J].石油大学学报:自然科学版,2005,29(1):144-149.
[8]吴贤涛,尹国勋.四川峨眉晚侏罗世湖泊沉积中震积岩的发现及其意义[J].沉积学报,1992,10(3):19-24.
[9]ATILLA AYDIN,RAMIL AHMADOV.Bed-parallel compaction bands in aeolian sandstone:Their identification,characterization and implications[J].Tectonophysics,2009,479:277-284.
[10]冯伟民,郑永飞,周建波.大别-苏鲁造山带大理岩碳氧同位素地球化学研究[J].岩石学报,2003,19(3):468-478.
[11]KEITH M H,WEBER J N.Isotopic composition and environmental classification of selected limestones and fossils.Geochim[J].Cosmochim.Acta,1964,28:1787-1816.
[12]周世全,李占杨,冯祖杰,等.河南西峡盆地恐龙蛋化石及埋藏特征[J].现代地质,1999,13(3):298-330.
[13]李艳芳,蔡厚安,梁汉东,等.西峡晚白垩世恐龙蛋化石宏观矿物组成研究及意义[J].吉林大学学报:地球科学版,2006,36(2):158-168.
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