公明水库—清林径水库连通工程碳酸盐岩地层时代归属

Gongming Reservoir-Qinglinjing Reservoir Water Connection Project age attribution of carbonate strata

摘要

公明水库—清林径水库连通工程线路东段位于深圳龙岗岩溶盆地西侧临近东莞边界一带，工程勘察揭示碳酸盐岩6段，各段碳酸盐岩地层时代存在争议，为明确碳酸盐岩的地层时代以便分析岩组的可溶性特性，有必要对各段碳酸盐岩进行地层时代研究。采取宏观至微观的“区域地层—岩性组合—岩石矿物成分与生物化石”的技术路径进行对比分析研究。首先对工程区的区域地层进行研究，初步确定各段地层时代，再对各段碳酸盐岩的岩性组合进行对比分析，进一步明确各段碳酸盐岩的地层时代；最后再结合各段岩石矿物成分与生物化石进行对比复核。经综合研究分析，明确了公明水库-清林径水库连通工程中涉及的各段碳酸盐岩的地层时代。结果表明，深圳龙岗岩溶盆地的碳酸盐岩地层时代复杂，地层时代的确定应在研究区域地质资料的前提下，结合勘察揭示的岩性综合对比分析确定。

Abstract

The eastern section of the Gongming Reservoir-Qinglinjing Reservoir Connection Project is located in the west side of the Longgang Karst Basin in Shenzhen near the Dongguan boundary. Engineering investigation reveals 6 sections of carbonate rocks.The age of each section of carbonate rocks is controversial. In order to clarify the stratigraphic age of carbonate rocks and analyze the soluble characteristics of rock groups, it is necessary to study the stratigraphic age of each section of carbonate rocks. The technical path of "regional stratum-lithology combination-rock mineral composition and fossils" from macro to micro is adopted for comparative analysis and research. Firstly, the regional strata of the project area are studied, and the stratigraphic age of each section is preliminarily determined. Then, the lithological combination of carbonate rocks in each section is compared and analyzed to further clarify the stratigraphic age of carbonate rocks in each section. Finally, the rock mineral composition and biological fossils of each section are compared and reviewed. Through comprehensive research and analysis, the stratigraphic age of carbonate rocks in each section involved in the Gongming Reservoir-Qinglinjing Reservoir Connection Project was clarified.The determination of the stratigraphic age should be based on the study of regional geological data, The result show that the age of carbonate strata in Longgang karst basin of Shenzhen is complex, combined with the comprehensive comparison and analysis of the lithology revealed by the survey.

关键词

碳酸盐岩地层 / 地层时代研究 / 公明水库—清林径水库连通工程

Key words

carbonate rock strata / study on the age of strata / Gongming Reservoir-Qinglinjing Reservoir Connection Project

Author summay

高 健(1975—), 男, 高级工程师, 硕士, 主要从事工程地质与岩土工程勘察与研究。E-mail: [e-mail]

基金资助

长江勘测规划设计研究有限责任公司科研项目(CX2024Z25-4)