CAJ | 학술논문

在湖北西部长阳地区完成的1：5万区域地质调查，以国际地层表（2008）为指南，从生物地层、岩石地层、事件地层、化学地层角度，对调查区地层进行了多重地层划分与对比研究。对长阳地区中／下奥陶统界线、奥陶系／志留系界线进行了重点研究，并与宜昌黄花场剖面、宜昌王家湾剖面进行了对比，实现了金钉子对比标志作用的区域拓展。对调查区各时代地层岩石类型和组合特征进行了详细研究和沉积环境分析，建立了3类沉积相模式，并重点查明了奥陶纪庙坡组、志留纪罗惹坪组底部、石炭纪和州组、二叠纪大隆组等层位的岩相变化与空间展布。对早三叠世遗迹化石和“错时相”沉积的环境意义和生物意义进行了探索。建立了调查区构造格架，阐明了构造形成演化历史，划分了构造变形阶段。调查了区内地质灾害类型及分布特征，探讨了地质灾害的形成条件和诱发因素。通过水系沉积物测量和异常查证，发现铅锌矿化点和钒钼矿化点各一处，确定两个铅锌矿矿源层。
재호북서부장양지구완성적1：5만구역지질조사，이국제지층표（2008）위지남，종생물지층、암석지층、사건지층、화학지층각도，대조사구지층진행료다중지층화분여대비연구。대장양지구중／하오도통계선、오도계／지류계계선진행료중점연구，병여의창황화장부면、의창왕가만부면진행료대비，실현료금정자대비표지작용적구역탁전。대조사구각시대지층암석류형화조합특정진행료상세연구화침적배경분석，건립료3류침적상모식，병중점사명료오도기묘파조、지류기라야평조저부、석탄기화주조、이첩기대륭조등층위적암상변화여공간전포。대조삼첩세유적화석화“착시상”침적적배경의의화생물의의진행료탐색。건립료조사구구조격가，천명료구조형성연화역사，화분료구조변형계단。조사료구내지질재해류형급분포특정，탐토료지질재해적형성조건화유발인소。통과수계침적물측량화이상사증，발현연자광화점화범목광화점각일처，학정량개연자광광원층。
Base on the International Stratigraphy Guide （2008） and working on the biostratigraphy, lithostratigraphy, event stratigraphy and chemical stratigraphy, multiple stratigraphic division and correlation sequence has been improved during 1：50 000 regional geological survey in Huoshaoping, Changyang, Western Hubei province. We studied the Lower-Middle Ordovician and Ordovician-Silurian Boundaries, and precisely compared with Huanghuachang and Wangjiawan Global Stratotype Section and Point （GSSP）, which expand- ed comparison of GSSP regionally. On the analysing of sedimentary environment, rock types and characteris- tics of rock assemblages in survey area, the authors put forward three sedimentary facies model, and identified sedimentary types and spatial distribution of Ordovician Miaopo Formation, bottom of Silurian Luoreping Formation, Carboniferous Hezhou Formation, Permian Dalong Formation and other formations. At the same time, the environmental and biologic bearing of the Early Triassic Trace fossils and ＂anachronistic facies＂ have been explored. After investigation, we established stratigraphic structural framework, clarified the tectonic evolution history, divided the structural deformation stage, investigated the relationship between geological hazards and tectonic activity. By stream sediments analysis and mineralization abnormalities check, we discovered one Pb-Zn, one V-Mo ore occurrences and two Pb-Zn source layers.