应用地球物理（英文版）
應用地毬物理（英文版）
응용지구물리（영문판）
APPLIED GEOPHYSICS
2007年
2期
89-93
,共5页
高精度重力%重力异常密度%黄土校正%地形校正
高精度重力%重力異常密度%黃土校正%地形校正
고정도중력%중력이상밀도%황토교정%지형교정
high precision gravity survey%gravity anomaly%density%loess correction%terrain correction
黄土塬区地形起伏大,地表黄土切割剧烈.地形起伏导致黄土厚度巨大变化,由于黄土密度与下伏地层之间存在较大的密度差异,由此产生了具有一定幅值的高频重力异常,并给重力勘探资料的处理、解释带来了困难.在SHJz构造带高精度重力勘探中,综合运用了地形校正和黄土校正技术,有效地克服了由于地形起伏和黄土厚度变化对重力勘探产生的不利影响,取得了精确的重力资料.并将该重力异常,结合其它物探资料进行综合解释,对圈定局部构造发挥了积极的作用.
黃土塬區地形起伏大,地錶黃土切割劇烈.地形起伏導緻黃土厚度巨大變化,由于黃土密度與下伏地層之間存在較大的密度差異,由此產生瞭具有一定幅值的高頻重力異常,併給重力勘探資料的處理、解釋帶來瞭睏難.在SHJz構造帶高精度重力勘探中,綜閤運用瞭地形校正和黃土校正技術,有效地剋服瞭由于地形起伏和黃土厚度變化對重力勘探產生的不利影響,取得瞭精確的重力資料.併將該重力異常,結閤其它物探資料進行綜閤解釋,對圈定跼部構造髮揮瞭積極的作用.
황토원구지형기복대,지표황토절할극렬.지형기복도치황토후도거대변화,유우황토밀도여하복지층지간존재교대적밀도차이,유차산생료구유일정폭치적고빈중력이상,병급중력감탐자료적처리、해석대래료곤난.재SHJz구조대고정도중력감탐중,종합운용료지형교정화황토교정기술,유효지극복료유우지형기복화황토후도변화대중력감탐산생적불리영향,취득료정학적중력자료.병장해중력이상,결합기타물탐자료진행종합해석,대권정국부구조발휘료적겁적작용.
The loess plateau is featured by a sharply undulated and remarkably incised surface. The sharp surface undulation means great variation of loess thickness. Since the loess layer exhibits significant density contrast with the underlying formation, a high frequency gravity anomaly with a certain magnitude will appear. The high frequency gravity anomaly can result in some difficulties for processing and interpreting the gravity data, thereby reducing the usefulness of gravity surveys in loess plateau areas. We carried out a high precision gravity survey in the SHJZ structural zone. During data processing, we applied terrain and loess corrections to effectively remove or suppress the gravity effect resulting from surface undulation and variation of loess thickness. We obtained high precision gravity data which matches well with other geophysical data. The comprehensive interpretation based on the final gravity data help to study local structure integrated with other published geophysical data.
