CAJ | 학술논문

在湖南西南部城步地区开展的1：5万区域地质调查，比较完整地建立了该区地层、构造格架以及岩浆演化序列。在青白口纪黄狮洞组火山岩夹层中获得锆石SHRIMPU—Pb年龄值828＋10Ma，为解决该地区乃至更大区域地层对比等基础地质问题提供了重要的年龄依据。根据岩体的接触关系、岩石学特征以及本次工作获得的同位素年龄资料，首次对测区花岗岩进行了详细的解体，共划分为12个侵入次、31个侵入体，并归并成青白口纪、志留纪、晚三叠世、中侏罗世四个岩浆演化系列，青白口纪片麻状花岗岩的发现提高了测区岩浆岩的研究程度。查明并阐述了“城步。江口大断裂”在区内的表现形式，建立了该区比较完整的构造变形序列，重塑了该区地质发展史。通过水系沉积物测量和异常查证，新发现矿（化）点15处，特别是发现了平滩中型钨矿，并为下一步找矿工作提供了明确的找矿远景区和找矿靶区。
재호남서남부성보지구개전적1：5만구역지질조사，비교완정지건립료해구지층、구조격가이급암장연화서렬。재청백구기황사동조화산암협층중획득고석SHRIMPU—Pb년령치828＋10Ma，위해결해지구내지경대구역지층대비등기출지질문제제공료중요적년령의거。근거암체적접촉관계、암석학특정이급본차공작획득적동위소년령자료，수차대측구화강암진행료상세적해체，공화분위12개침입차、31개침입체，병귀병성청백구기、지류기、만삼첩세、중주라세사개암장연화계렬，청백구기편마상화강암적발현제고료측구암장암적연구정도。사명병천술료“성보。강구대단렬”재구내적표현형식，건립료해구비교완정적구조변형서렬，중소료해구지질발전사。통과수계침적물측량화이상사증，신발현광（화）점15처，특별시발현료평탄중형오광，병위하일보조광공작제공료명학적조광원경구화조광파구。
Stratigraphic framework, tectonic framework and magmatic evolutionary series have been established in 1：50 000 regional geological survey in Chengbu, southwestern Hunan province. The deposition of Huangshidong Formation of Qingbaikouan System is at 828＋ 10 Ma which is yielded by zircon SHRIMP U-Pb dating. According to the contact relationship, rock characteristics and the isotope ages new-acquired, we subdivided the granite-bodies in Chengbu area into 12 intrusive periods, 31 intrusive masses, and merged into four magmatic evolutionary series： Qingbaikou Period, Silurian Period, Late Triassic Period and Jurassic Peri- od. The new discovery of gneissose granite of Qingbaikou Period greatly improved the study of magmatic rocks in this area. Structural feature of Chengbu-Jiangkou rupture fault is investigated and the integrated tectonic deformation succession of Chengbu area is rebuilt, so as geological history. 15 ore occurrences （including Pingtan medium-size scheelite deposit） are discovered by stream sediments analysis and mineralized abnormalities check, the newly discovery would provide exploration target for the next step prospecting work.