GRGC: Collaborative Research: A "Reference Section" at Cismon, Italy for the APTICORE Program

9405108拉森这项建议协调了四个美国小组与意大利调查人员的努力，以对意大利西斯蒙附近一段125米长的阿普提安-巴雷米期地层进行取心和分析。选择核心地点是为了恢复一个扩大的远洋部分，记录了大规模全球变化的时间，即过渡到白垩纪中期“温室”气候的时间。这项研究是一项名为APTICORE的大型项目的一部分，将为全球气候变化的这一主要时期定义一个“参考部分”。来自佛罗里达大学、密歇根大学、布朗大学和罗德岛大学(他们要求支持这一提议)和米兰大学的一个调查小组将研究岩心和日志，该大学的调查人员由Consiglio Nazion ale delle Ricerche资助。佛罗里达州的调查员将研究取心部分的磁性地层和岩石磁性，以确定其他研究的基本时间框架，并确定该部分的磁性矿物学。密歇根州的研究人员将研究碳同位素地层学(碳酸盐和有机碳)和锶同位素地层学，以确定全球气候变化期间碳在海洋系统中的分配方式，并以锶同位素为标志确定火山脉冲的初始时间和相对强度。Brown调查员将通过数字比色法和相关的化学分析来研究取心剖面的旋回地层学，以确定该剖面的详细沉积历史以及Selli级“黑色页岩”事件和之前各种磁性克伦的绝对时间跨度。罗德岛调查员将共同管理现场项目，并将利用化学和微电阻率测井研究该剖面的化学地层学和旋回地层学。他将确定该剖面的化学沉积历史，并独立测量具有显微分辨率的旋回成像，以进行如上所述的时间分辨率研究。米兰大学的调查人员将确定该区段的生物地层学，解释生物群对气候变化的生态反应，并负责岩芯的存档和整理。预计这些研究都将相互补充，并以各种联合格式出版，试图提取在全球重大气候变化期间各种地质过程之间的因果联系。

9405108 Larson This proposal coordinates the efforts of four American groups, in conjunction with Italian investigators, to core and analyze a 125 meter-long section of Aptian-Barremian age strata near Cismon, Italy. The core site has been selected to recover an expanded pelagic section recording a time of large-scale global change, namely the time of transition into the mid-Cretaceous "greenhouse" climate. The study is part of a large program called APTICORE, and will define a "reference section" for this major period of global climate change. The cores and logs will be studied by a team of investigators from the Universities of Florida, Michigan, Brown, and Rhode Island (who request support with this proposal) and the Universita de Milano, whose investigators are funded by the Consiglio Nazionale delle Ricerche. The Florida investigator will study the magnetostratigraphy and rock magnetic properties of the cored section to define the essential timeframe for other studies and to determine the magnetic mineralogy of the section. The Michigan investigators will study the carbon isotope stratigraphy (both as carbonate and organic carbon) and strontium isotope stratigraphy to determine the manner in which carbon is partitioned in the oceanic system during global climate change, and to determine the initial timing and relative magnitude of the volcanic pulse using Sr-isotopes as markers. The Brown investigator will study the cyclostratigraphy of the cored section by digital colorimetry and associated chemical analyses to determine the detailed sedimentary history of the section and the absolute time spans of the Selli Level "black shale" episode and various preceding magnetic chrons. The Rhode Island investigator will co-mange the field program and will study the chemostratigraphy and cyclostratigraphy of the section with chemical and microresistivity logs. He will determine the chemo-sedimentary history of the section and independently measure cyclosratigraphy with microresi stivity for time resolution studies as described above. The Universita di Milano investigators will define the biostratigraphy of the section, interpret the ecologic responses of the biota to climate change, and have responsibility for archiving and curation of the cores. It is expected that these studies will all compliment each other and be published in various joint formats in attempts to extract the causes and effects that link various geologic processes during a period of major global climate change.