Collaborative Research: Hydrologic Implications of Carbonate Cementation in an Alluvial Aquifer, Sierra Ladrones Formation, New Mexico

合作研究:新墨西哥州 Sierra Ladrones 地层冲积含水层中碳酸盐胶结作用的水文影响

基本信息

  • 批准号:
    9506474
  • 负责人:
  • 金额:
    $ 7.27万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    1995
  • 资助国家:
    美国
  • 起止时间:
    1995-09-01 至 1998-08-31
  • 项目状态:
    已结题

项目摘要

9506474 Davis This proposal is for a collaborative research project investigating the relationships between groundwater flow and diagenesis in alluvial aquifers. Geologists have long recognized the importance of groundwater in the physical and chemical alteration of sediments. However, relatively few studies have been conducted that explicitly and quantitatively account for groundwater flow. Groundwater controls on the spatial distribution of diagenetic fabrics have received even less attention. Hydrogeologists, on the other hand, are beginning to formulate quantitative models describing the spatial distribution of hydraulic conductivity. From a geological perspective, the spatial distribution of hydraulic conductivity is a result of the processes of deposition and diagenesis. Incorporating information about geological processes into quantitative models of heterogeneity requires an understanding of the relationship between the processes and the spatial distribution of hydraulic conductivity. In this study, the relationship between groundwater flow and diagenesis will be investigated in the Plio-Pleistocene Sierra Ladrones Formation, an alluvial aquifer in the Albuquerque Basin of central New Mexico. Previous work has resulted in a comprehensive understanding of the depositional and paleogeographic setting of the study area. The proposed research has two principal objectives: (1) to determine the influence of early carbonate cementation on heterogeneity, and (2) to understand the controls on the origin and spatial distribution of early carbonate cement, the main diagenetic alteration influencing permeability in the unit. The first objective is a natural extension of previous work at the study site by Davis and colleagues, investigating the relationship of depositional features to heterogeneity. The second objective builds upon preliminary work at the site that indicates a close relationship between cementation and past fluid flow conditions. The hydrological aspects of the study will be the responsibility of J. M. Davis (University of New Hampshire) and the diagenetic/geochemical aspects will be the responsibility of P.S. Mozley (New Mexico Tech). The study will involved mapping the distribution and orientation of cemented zones in the field, and petrographic and geochemical analysis of the cements. The principal questions addressed by the proposed research are: (1) What are the types and spatial distributions of the calcite cements? (2) What is the origin of the various types of cements? (3) What are the permeability characteristics of the different types of cemented zones? (4) Can the spatial distribution of the cements and the orientation of elongate concretions be used to infer past groundwater flow conditions in the saturated zone?
9506474戴维斯这是一个合作研究项目的建议,调查地下水流和冲积含水层成岩作用之间的关系。地质学家早就认识到地下水在沉积物的物理和化学变化中的重要性。 然而,相对较少的研究已经进行了明确和定量的地下水流。 地下水对成岩组构空间分布的控制作用受到的关注更少。 水文地质学家,另一方面,开始制定定量模型描述的空间分布的水力传导性。 从地质学的角度来看,渗透率的空间分布是沉积和成岩作用的结果。将地质过程的信息转化为非均匀性的定量模型需要了解这些过程与导水率空间分布之间的关系。 在这项研究中,地下水流和成岩作用之间的关系将在上新世更新世塞拉利昂Ladrones组,在新墨西哥州中部的阿尔伯克基盆地的冲积含水层进行调查。 以前的工作导致了一个全面的了解沉积和古地理环境的研究领域。 建议的研究有两个主要目标:(1)确定早期碳酸盐胶结作用对非均质性的影响,(2)了解早期碳酸盐胶结物的来源和空间分布的控制因素,这是影响单元渗透率的主要成岩蚀变。 第一个目标是戴维斯及其同事在研究现场的先前工作的自然延伸,调查沉积特征与非均质性的关系。 第二个目标建立在现场的初步工作,表明胶结作用和过去的流体流动条件之间的密切关系。 水文方面的研究将是负责的J。戴维斯(新罕布什尔州大学)和成岩/地球化学方面的责任将是P. S。莫兹利(新墨西哥州技术)。 这项研究将包括绘制油田胶结带的分布和方向图,以及对胶结物进行岩相学和地球化学分析。 主要问题是:(1)方解石胶结物的类型和空间分布特征是什么?(2)各种水泥的来源是什么?(3)不同类型胶结层的渗透率特征是什么?(4)胶结物的空间分布和细长结核的方向能否用来推断饱和带中过去的地下水流条件?

项目成果

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J. Matthew Davis其他文献

J. Matthew Davis的其他文献

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{{ truncateString('J. Matthew Davis', 18)}}的其他基金

Collaborative Research: Hydrogeologic Analysis of Oriented Carbonate Concretions, Sierra Ladrones Formation, New Mexico
合作研究:新墨西哥州 Sierra Ladrones 地层定向碳酸盐结核的水文地质分析
  • 批准号:
    9725194
  • 财政年份:
    1998
  • 资助金额:
    $ 7.27万
  • 项目类别:
    Standard Grant
Physical and Chemical Heterogeneity of Aquifers: A Quantitative Geological Investigation
含水层的物理和化学非均质性:定量地质调查
  • 批准号:
    9526795
  • 财政年份:
    1996
  • 资助金额:
    $ 7.27万
  • 项目类别:
    Standard Grant

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