苏北淮安盐盆杨槐区块浦二段盐韵律特征及其古气候意义
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摘要
盐湖沉积因具有成盐多期性和连续完整性的特点,是恢复成盐期古环境的重要研究对象,形成的不同级次盐韵律记录了不同尺度周期下古气候的干湿变化。上白垩统浦口组是淮安盐盆的主要含盐层系,对含盐层段盐韵律的研究有助于恢复该地区成盐期的古气候特征。在对资料井A1井取心段岩心精细观察和岩样矿物成分分析的基础上,分析资料井岩性的垂向变化,对浦口组盐韵律特征进行识别并划分。根据盐韵律对古气候的指示作用研究成盐期区块短尺度气候周期下的古气候变化。将淮安盐盆杨槐区块浦口组划分出Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ级韵律,识别出完整的盐韵律组合,即泥岩—钙芒硝质盐岩—盐岩—钙芒硝质盐岩。含盐段中广泛发育暖温相矿物钙芒硝,指示气候特征为炎热的暖旱型。在Ⅳ级韵律尺度下建立了气候干湿性变化曲线,表明区块气候干湿性波动频繁,但仍以干旱为主,韵律厚度大致反映了气候波动频率大小。
Salt lake sediments,commonly characterized by its multi-stage formation and continuity,are important in paleoenvironment reconstruction. The salt rhythms of different scales show different paleoclimatic changes in their respective scale. The Pukou Formation is the main saliniferous sequence in the Huai'an basin,and studying the rhythms developed in the rock record can reveal the paleoclimatic characteristics. Based on core observation and mineral composition analysis,we have determined the salt rhythms and the vertical lithological variations. The paleoclimatic indications by the rhythms have revealed short-term paleoclimatic changes. The salt rhythms can be divided into five cycles,and each cycle is identified by a complete sequence of mudstone-glauberite-bearing salt rock-salt rock-glauberite-bearing salt rock. The extensive development of warm saline mineral(e. g. glauberite) indicates the paleoclimate was warm and arid. This study reconstructed the paleoclimate at IV-order rhythm,which was characterized by frequent arid-wet climatic fluctuations,despite dominated by arid climate. The thickness of rhythms generally reflects the fluctuation frequency.
Salt lake sediments,commonly characterized by its multi-stage formation and continuity,are important in paleoenvironment reconstruction. The salt rhythms of different scales show different paleoclimatic changes in their respective scale. The Pukou Formation is the main saliniferous sequence in the Huai'an basin,and studying the rhythms developed in the rock record can reveal the paleoclimatic characteristics. Based on core observation and mineral composition analysis,we have determined the salt rhythms and the vertical lithological variations. The paleoclimatic indications by the rhythms have revealed short-term paleoclimatic changes. The salt rhythms can be divided into five cycles,and each cycle is identified by a complete sequence of mudstone-glauberite-bearing salt rock-salt rock-glauberite-bearing salt rock. The extensive development of warm saline mineral(e. g. glauberite) indicates the paleoclimate was warm and arid. This study reconstructed the paleoclimate at IV-order rhythm,which was characterized by frequent arid-wet climatic fluctuations,despite dominated by arid climate. The thickness of rhythms generally reflects the fluctuation frequency.
引文
[1]张永生,王国力,杨玉卿,等.江汉盆地潜江凹陷古近系盐湖沉积盐韵律及其古气候意义[J].古地理学报,2005,7(4):461-470.
[2]李明慧,康世昌,郑绵平,等.青藏高原秋里南木湖盐类沉积韵律[J].高校地质学报,2007,13(1):35-42.
[3]张永生,杨玉卿,漆智先,等.江汉盆地潜江凹陷古近系潜江组含盐岩系沉积特征与沉积环境[J].古地理学报,2003,5(1):29-35.
[4]朱忠德.山东大汶口盐矿盐类沉积的韵律特征和沉积阶段[J].矿床地质,1988,7(1):87-96.
[5]张建,龚耀冲,高雨根.淮安盐盆张兴块段石盐矿床成因及含盐系韵律特征[J].中国井矿盐,2010,41(2):21-24.
[6]孟凡巍,倪培,葛晨东,等.实验室合成石盐包裹体的均一温度以及古气候意义[J].岩石学报,2011,27(5):1543-1547.
[7]陈曦,王成善,黄永建.白垩纪快速气候变化研究新进展——温室世界中的冰川证据[J].现代地质,2011,25(3):409-418.
[8]万晓樵,王焯,司伟民.晚白垩世介形类壳体稳定同位素尝试——以松科1井南孔样品为例[J].现代地质,2011,25(3):401-408.
[9]韩建恩,朱大岗,邵兆刚,等.黄河源地区优云湖相地层环境代用指标反映的古环境变化[J].现代地质,2013,27(2):269-277.
[10]TRAUTH M H,LARRASOA?A J C,MUDELSEE M.Trends,rhythms and events in Plio-Pleistocene African climate[J].Quaternary Science Reviews,2009,28(5):399-411.
[11]洪汉烈,于娜,薛惠娟,等.临夏盆地晚更新世沉积物粘土矿物的特征及其古气候指示[J].现代地质,2007,21(2):406-414.
[12]崔莹,席党鹏,万晓樵.大庆油田徐22井青山口组/姚家组微体生物及其古气候响应[J].现代地质,2007,21(3):484-490.
[13]程捷,唐德翔,张绪教,等.粘土矿物在黄河源区古气候研究中的应用[J].现代地质,2003,17(1):47-51.
[14]郭文琳,苏文博.华北克拉通北部14亿年前古风化壳的地球化学特征及古气候意义[J].现代地质,2014,28(2):243-255.
[15]杨学英,周山富.淮安地区上白垩统孢粉化石新知[J].复式油气田,1995,6(1):29-34.
[16]龚与觐,孔庆玉.苏北淮安凹陷白垩系浦口组成盐条件的讨论[J].石油实验地质,1989,11(2):136-143.
[17]陈安定.苏北盆地构造特征及箕状断陷形成机理[J].石油与天然气地质,2010,31(2):140-150.
[18]邱海峻,许志琴,乔德武.苏北盆地构造演化研究进展[J].地质通报,2006,25(增刊2):1117-1120.
[19]秦亚,程新民,常建平,等.辽宁本溪晶花洞碳酸钙沉积物颜色多样性分析[J].中国岩溶,2011,30(3):354-358.
[20]李双建,张然,王清晨.沉积物颜色和粘土矿物对库车坳陷第三纪气候变化的指示[J].沉积学报,2006,24(4):521-530.
[21]余丽玲.盐湖盆地沉积体系分析[D].武汉:长江大学,2013.
[22]阎泗民,周建松,王启飞,等.苏北地区井下浦口组地层研究[J].地层学杂志,2001,25(2):144-149.
[23]郑绵平,赵元艺,刘俊英.第四纪盐湖沉积与古气候[J].第四纪研究,1998,18(4):297-307.
[24]刘江艳,张昌民,朱锐,等.江汉盆地新沟油田新沟嘴组盐韵律多级划分及其地质意义[J].古地理学报,2015,17(4):565-572.
[25]王敏芳,黄传炎,徐志诚,等.综述沉积环境中古盐度的恢复[J].新疆石油天然气,2006,2(1):9-12.
[26]李进龙,陈东敬.古盐度定量研究方法综述[J].油气地质与采收率,2003,10(5):1-3.
[27]段振豪,袁见齐.察尔汗盐湖物质来源的研究[J].现代地质,1988,2(4):420-428.
[2]李明慧,康世昌,郑绵平,等.青藏高原秋里南木湖盐类沉积韵律[J].高校地质学报,2007,13(1):35-42.
[3]张永生,杨玉卿,漆智先,等.江汉盆地潜江凹陷古近系潜江组含盐岩系沉积特征与沉积环境[J].古地理学报,2003,5(1):29-35.
[4]朱忠德.山东大汶口盐矿盐类沉积的韵律特征和沉积阶段[J].矿床地质,1988,7(1):87-96.
[5]张建,龚耀冲,高雨根.淮安盐盆张兴块段石盐矿床成因及含盐系韵律特征[J].中国井矿盐,2010,41(2):21-24.
[6]孟凡巍,倪培,葛晨东,等.实验室合成石盐包裹体的均一温度以及古气候意义[J].岩石学报,2011,27(5):1543-1547.
[7]陈曦,王成善,黄永建.白垩纪快速气候变化研究新进展——温室世界中的冰川证据[J].现代地质,2011,25(3):409-418.
[8]万晓樵,王焯,司伟民.晚白垩世介形类壳体稳定同位素尝试——以松科1井南孔样品为例[J].现代地质,2011,25(3):401-408.
[9]韩建恩,朱大岗,邵兆刚,等.黄河源地区优云湖相地层环境代用指标反映的古环境变化[J].现代地质,2013,27(2):269-277.
[10]TRAUTH M H,LARRASOA?A J C,MUDELSEE M.Trends,rhythms and events in Plio-Pleistocene African climate[J].Quaternary Science Reviews,2009,28(5):399-411.
[11]洪汉烈,于娜,薛惠娟,等.临夏盆地晚更新世沉积物粘土矿物的特征及其古气候指示[J].现代地质,2007,21(2):406-414.
[12]崔莹,席党鹏,万晓樵.大庆油田徐22井青山口组/姚家组微体生物及其古气候响应[J].现代地质,2007,21(3):484-490.
[13]程捷,唐德翔,张绪教,等.粘土矿物在黄河源区古气候研究中的应用[J].现代地质,2003,17(1):47-51.
[14]郭文琳,苏文博.华北克拉通北部14亿年前古风化壳的地球化学特征及古气候意义[J].现代地质,2014,28(2):243-255.
[15]杨学英,周山富.淮安地区上白垩统孢粉化石新知[J].复式油气田,1995,6(1):29-34.
[16]龚与觐,孔庆玉.苏北淮安凹陷白垩系浦口组成盐条件的讨论[J].石油实验地质,1989,11(2):136-143.
[17]陈安定.苏北盆地构造特征及箕状断陷形成机理[J].石油与天然气地质,2010,31(2):140-150.
[18]邱海峻,许志琴,乔德武.苏北盆地构造演化研究进展[J].地质通报,2006,25(增刊2):1117-1120.
[19]秦亚,程新民,常建平,等.辽宁本溪晶花洞碳酸钙沉积物颜色多样性分析[J].中国岩溶,2011,30(3):354-358.
[20]李双建,张然,王清晨.沉积物颜色和粘土矿物对库车坳陷第三纪气候变化的指示[J].沉积学报,2006,24(4):521-530.
[21]余丽玲.盐湖盆地沉积体系分析[D].武汉:长江大学,2013.
[22]阎泗民,周建松,王启飞,等.苏北地区井下浦口组地层研究[J].地层学杂志,2001,25(2):144-149.
[23]郑绵平,赵元艺,刘俊英.第四纪盐湖沉积与古气候[J].第四纪研究,1998,18(4):297-307.
[24]刘江艳,张昌民,朱锐,等.江汉盆地新沟油田新沟嘴组盐韵律多级划分及其地质意义[J].古地理学报,2015,17(4):565-572.
[25]王敏芳,黄传炎,徐志诚,等.综述沉积环境中古盐度的恢复[J].新疆石油天然气,2006,2(1):9-12.
[26]李进龙,陈东敬.古盐度定量研究方法综述[J].油气地质与采收率,2003,10(5):1-3.
[27]段振豪,袁见齐.察尔汗盐湖物质来源的研究[J].现代地质,1988,2(4):420-428.