华南地质与矿产
華南地質與礦產
화남지질여광산
GEOLOGY AND MINERAL RESOURCES OF SOUTH CHINA
2011年
4期
286-291
,共6页
田望学%毛新武%何仁亮%李雄伟%胡万强%江天风%黄建军
田望學%毛新武%何仁亮%李雄偉%鬍萬彊%江天風%黃建軍
전망학%모신무%하인량%리웅위%호만강%강천풍%황건군
阳逻砾石层%早更新世堆积%下蜀黄土层%第四纪堆积序列%武汉地区
暘邏礫石層%早更新世堆積%下蜀黃土層%第四紀堆積序列%武漢地區
양라력석층%조경신세퇴적%하촉황토층%제사기퇴적서렬%무한지구
Yangluo gravel bed%Eopleistocene accumulation%Xiashu loess%Quaternary accumulate sequence%Wuhan area
武汉地区1:5万区域地质调查以第四系研究为重点,通过地面调查、物探、钻探等多种调查手段,尤其是通过钻孔和露头剖面测量,在原阳逻砾石层内部发现分布稳定的沉积间断界面,并以此将其分为两套明显差异的砾石组合,反映了物源区侵蚀作用的变化过程;发现武汉长江以南地区存在早更新世堆积,取得了较明确的时代依据,确定了其属山间近源带状洪积扇成因;对广泛分布的红土层进行了解体,将其分为冲洪积组合、残坡积组合以及混合成因等组合类型;在青山镇以南的沙湖.东湖.严西湖之间发现大片风尘堆积的下蜀黄土层,确定为原“青山层”的下部层位;对第四系沉降区施测了系统采样的标准钻孔。通过对武汉地区不同时期、不同区域第四系的分析与研究,建立了武汉地区第四纪堆积序列,提高了武汉地区第四纪研究程度。
武漢地區1:5萬區域地質調查以第四繫研究為重點,通過地麵調查、物探、鑽探等多種調查手段,尤其是通過鑽孔和露頭剖麵測量,在原暘邏礫石層內部髮現分佈穩定的沉積間斷界麵,併以此將其分為兩套明顯差異的礫石組閤,反映瞭物源區侵蝕作用的變化過程;髮現武漢長江以南地區存在早更新世堆積,取得瞭較明確的時代依據,確定瞭其屬山間近源帶狀洪積扇成因;對廣汎分佈的紅土層進行瞭解體,將其分為遲洪積組閤、殘坡積組閤以及混閤成因等組閤類型;在青山鎮以南的沙湖.東湖.嚴西湖之間髮現大片風塵堆積的下蜀黃土層,確定為原“青山層”的下部層位;對第四繫沉降區施測瞭繫統採樣的標準鑽孔。通過對武漢地區不同時期、不同區域第四繫的分析與研究,建立瞭武漢地區第四紀堆積序列,提高瞭武漢地區第四紀研究程度。
무한지구1:5만구역지질조사이제사계연구위중점,통과지면조사、물탐、찬탐등다충조사수단,우기시통과찬공화로두부면측량,재원양라력석층내부발현분포은정적침적간단계면,병이차장기분위량투명현차이적력석조합,반영료물원구침식작용적변화과정;발현무한장강이남지구존재조경신세퇴적,취득료교명학적시대의거,학정료기속산간근원대상홍적선성인;대엄범분포적홍토층진행료해체,장기분위충홍적조합、잔파적조합이급혼합성인등조합류형;재청산진이남적사호.동호.엄서호지간발현대편풍진퇴적적하촉황토층,학정위원“청산층”적하부층위;대제사계침강구시측료계통채양적표준찬공。통과대무한지구불동시기、불동구역제사계적분석여연구,건립료무한지구제사기퇴적서렬,제고료무한지구제사기연구정도。
Quaternary System research is focused in the 1:50 000 regional geological survey of Wuhan area, by applying various survey methods like Ground surveys, geophysical exploration, drilling and so on, especially the drilling and outcrop profiling. Stable sedimentary discontinuous interface is found in Yangluo gravel bed, according which Yangluo gravel bed can be subdivided into two obviously different groups which record the process changes for erosion action in the source area. Early Pleistocene deposition is existing in south of the Yangtze River in Wuhan, from which we can get the explicit times evidence and confirm that it belongs to intermontane near-source striatus proluvial fan type deposition. The widely distributed red soil in Wuhan area is subdivided into alluvial-diluvial assemblages, residual-slope assemblages, hydrid original as- semblages types, and so on. Lots of Xiashu loess is found in Shahu, Donghu and Yanxihu lake area in south of Qingshan town, which is identified as locating in the lower "Qingshan layer". Standard boreholes are constructed in Quaternary depressed area for systematic sampling. More reliable Quaternary accumulation series of Wuhan area is established by our study.