Geochemical data from selected bedrock samples in the Deep River and Essex quadrangles, Middlesex and New London Counties, Connecticut

This data release comprises major and trace element geochemical data from ninety (90) selected bedrock samples in support of the identification, discrimination, and correlation of map units in the Deep River and Essex quadrangles, Middlesex County, Connecticut. In data tables, the attributes “map_unit_symbol” and "map_unit_name" correlate the sample to the map unit in a planned bedrock geologic Scientific Investigations Map of the Deep River and Essex quadrangles. Data are from three sources, as described below, and are contained in three separate files by data source. 1) X-ray fluorescence (XRF) analyses at Wesleyan University XRF Lab (31 of 90 samples). Major element oxides were measured in fused glass beads, and trace elements were analyzed in pressed pellets. 2) Inductively coupled plasma optical emission spectroscopy (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS) analyses at Activation Laboratories, Inc. (11 of 90 samples). See Data Dictionary for method(s) used for each analyte. 3) XRF analyses at U.S. Geological Survey (48 of 90 samples). A table of compiled geochemical results from the Deep River and Essex quadrangles, including an additional fifty-seven (57) legacy analyses, is included with the aforementioned map. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

本次数据发布包含90份精选基岩样品的主量与微量元素地球化学数据，用于辅助识别、划分与对比美国康涅狄格州米德尔塞克斯县深河（Deep River）和埃塞克斯（Essex）标准图幅内的地质填图单元。在数据表中，属性项「图元符号（map_unit_symbol）」与「图元名称（map_unit_name）」可将样品与规划中的深河和埃塞克斯图幅基岩地质科学调查图件中的填图单元进行关联。
本数据集包含三类来源数据，并按数据来源分为三个独立文件，具体如下：
1) 卫斯理大学X射线荧光光谱（X-ray fluorescence, XRF）实验室的XRF分析（90份样品中的31份）：主量元素氧化物采用熔融玻璃珠法测定，微量元素采用压片法分析。
2) 活化实验室股份有限公司（Activation Laboratories, Inc.）开展的电感耦合等离子体光发射光谱（Inductively coupled plasma optical emission spectroscopy, ICP-OES）与电感耦合等离子体质谱（Inductively coupled plasma mass spectrometry, ICP-MS）分析（90份样品中的11份），各分析物的测试方法详见数据字典（Data Dictionary）。
3) 美国地质调查局（U.S. Geological Survey）的XRF分析（90份样品中的48份）。
本次配套提交的前述科学调查图件中，还包含一份整合了深河与埃塞克斯图幅地球化学结果的表格，其中额外纳入了57份遗留分析数据。
文中提及的商业名称、企业名称或产品名称仅用于描述用途，并不代表美国政府对此类名称的背书或认可。