A New Approach to Study Dolomitization Emphasizing Fluid Inclusions, Enewetak Atoll

这是对埃尼威托克环礁白云石的研究， 采用新的流体包裹体技术和标准 技术，以开发一种新的模式， 更好地理解地球化学触发器 消毒。 使用Enewetak白云石进行深入研究， 传统的间接技术已经证明， 足以约束模型和地球化学触发器 的分解。 或者，流体包裹体提供 直接记录了古代 冷却液。 冷冻技术将应用于 Enewetak流体包裹体来确定 冷却液。 侦察数据显示， 白云石从盐水中沉淀出来， 矿化液的盐度。 侦察数据 表明白云石是从盐水中沉淀出来的， 是海水盐度的两倍 一种新的模式， 涉及回流盐水的蒸馏， 沉淀钙钛矿是几种假设之一， 测试. 激光拉曼微探针工作将首次提供 古低温流体中硫酸盐的分析 消毒。 流体包裹体的提取物将 通过DCP和IC分析阳离子和离子， 表征石化流体。 这种新方法 将为流体演化提供新的见解， 地球化学成因 此类信息 无法通过标准技术收集。 最后 白云石将通过标准碳、氧和 锶同位素技术，使工作直接 与其他白云石研究相比， 石化条件。

This is a study of dolomite from Enewetak Atoll that employs new fluid inclusion techniques and standard techniques to develop a new model for dolomitization and to better understand the geochemical triggers responsible for dolomitization. Thorough study of Enewetak dolomite using traditional indirect techniques has proven less than adequate in constraining the model and geochemical triggers of dolomitization. Alternatively, fluid inclusions provide a direct record of the chemical composition of ancient dolomitizing fluids. Freezing techniques will be applied to the Enewetak fluid inclusions to determine the salinity of dolomitizing fluids. Reconnaissance data indicate that the dolomite precipitated from a brine that was twice the salinity of dolomitizing fluids. Reconnaissance data indicate that the dolomite precipitated from a brine that was twice the salinity of seawater. Thus, a new model for dolomitization involving reflux of brines that have not precipitated evaporites is one of several hypotheses to be tested. Laser Raman microprobe work will provide the first analyses of sulfate in an ancient fluid of low-temperature dolomitization. Extracts from fluid inclusions will be analyzed for cations and ions by DCP and IC to further characterize fluids of dolomitization. This new approach will provide new insight into fluid evolution and geochemical triggers of dolomitization. Such information cannot be gleaned by standard techniques. Lastly, the dolomite will be analyzed by standard carbon, oxygen, and strontium isotopic techniques to make the work directly comparable to other dolomite studies and to further evaluate conditions of dolomitization.