{
    "tag": 6580,
    "title": "Geochemistry of sediment and organic matter in drainages burned by the Altas and Nuns wildfires in October 2017 and of nearshore seabed sediment in north San Francisco Bay from March to April 2018",
    "pubdate": "20200218",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P9VDTDSC",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/pcmsc\/DataReleases\/ScienceBase\/DR_P9VDTDSC\/SanFranciscoNorthBayWildfireStreamNearshoreSedimentGeochemistry2018_metadata.faq.html",
    "format": null,
    "email": null,
    "descript": "Fine-grained sediment was collected from the banks of Napa River, Sonoma Creek, and tributaries in March 2018 and from shallow nearshore areas of the northern reach of San Francisco Bay in April 2018. Bulk sediment was dated using activities of short-lived cosmogenic radionuclides (beryllium-7, cesium-137, and lead-210). Contents of potentially toxic metals and source-rock-indicative elements, including rare earth elements, were quantified in the fine fraction of sediment (particles less than 0.063 mm diameter). Ratios of stable carbon-13\/carbon-12 isotopes and total carbon to total nitrogen were determined in sedimentary organic matter.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Takesue, Renee K.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "384",
            "name": "fires",
            "scope": "Combustion, marked by flames or intense heat, in natural settings, often ignited by lightning or human activities.  For fires set as part of natural resource management, use 'controlled fires'."
        },
        {
            "thcode": 2,
            "code": "437",
            "name": "geochemistry",
            "scope": "Study of the distribution of chemical elements and natural compounds on the earth and in the atmosphere and the chemical processes that affect the earth."
        },
        {
            "thcode": 2,
            "code": "609",
            "name": "isotopic analysis",
            "scope": "Experimental determination of the proportion of a given isotope (or isotopes) in a sample."
        },
        {
            "thcode": 2,
            "code": "711",
            "name": "mass spectroscopy",
            "scope": "Instrumental technique to separate and identify molecules.  Gaseous ions are formed, with or without fragmentation.  Their mass\/charge ratios and relative electrical abundance are then measured or the spectra are recorded."
        },
        {
            "thcode": 2,
            "code": "1553",
            "name": "rare earth elements",
            "scope": "A group of elements including the lanthanoids, or lanthanides, of interest because they are used in modern technological industries.  Yttrium and scandium are often included in this group."
        },
        {
            "thcode": 2,
            "code": "1005",
            "name": "rocks and deposits",
            "scope": "Solid masses that make up the earth's crust as well as accumulations of materials. Use for major rock types and unconsolidated deposits. For deposits of economic value, see related terms."
        },
        {
            "thcode": 2,
            "code": "1181",
            "name": "toxic trace element contamination",
            "scope": "Introduction into the environment of elements (such as arsenic, cadmium, lead, and mercury) which have a deleterious effect on living organisms when found naturally in only minor amounts (concentrations less than 1.0 milligram per liter) in water or sediment."
        },
        {
            "thcode": 15,
            "code": "007",
            "name": "environment",
            "scope": "Environmental resources, protection and conservation, for example environmental pollution, waste storage and treatment, environmental impact assessment, monitoring environmental risk, nature reserves, landscape, water quality, air quality, environmental modeling"
        },
        {
            "thcode": 15,
            "code": "008",
            "name": "geoscientificInformation",
            "scope": "Information pertaining to earth sciences, for example geophysical features and processes, geology, minerals, sciences dealing with the composition, structure and origin of the earth's rocks, risks of earthquakes, volcanic activity, landslides, gravity information, soils, permafrost, hydrogeology, groundwater, erosion"
        },
        {
            "thcode": 23,
            "code": "23",
            "name": "Substrate",
            "scope": "Represents the character and composition of the surface and near surface of the sea floor in subtidal or intertidal areas, as defined in the Substrate Component of CMECS or in similar classification systems. Distributions are records of substrate characteristics based on visual or photographic inspection or on analysis of samples and cores, and they also include interpretive maps classifying areas on the basis of combinations of observations, hydrodynamic models, or geological models. Assessments include evaluations of present ecological or economic values of substrate distributions, drivers of substrate change, and functions of substrates. Predictions are the results of models or projections of future substrate distributions, values, or ecological impacts, including predicted substrate changes due to natural and human forces including erosion, accretion, sea-level change, extraction, trawling, or other factors; and they are the results of scenario-based models of substrate changes on ecological or economic values under different management strategies or other human alterations."
        },
        {
            "thcode": 61,
            "code": "696",
            "name": "bedrock geochemistry",
            "scope": "the study of the chemical composition and genesis of earth materials within the lithospere."
        },
        {
            "thcode": 61,
            "code": "300",
            "name": "heavy metal pollution",
            "scope": "the behavior and effects of heavy metals on natural environments."
        },
        {
            "thcode": 61,
            "code": "699",
            "name": "isotope geochemistry",
            "scope": "used for both stable isotope geochemistry (to understand chemical fractionation in earth materials and processes) and radiogenic isotope geochemistry (to determine the ages and origins of earth materials)."
        },
        {
            "thcode": 61,
            "code": "504",
            "name": "radiometric dating",
            "scope": "used for all absolute dating techniques based on analyzing the abundance of a radioactive isotope and its decay products in a given geologic (or archaeologic) sample."
        },
        {
            "thcode": 61,
            "code": "700",
            "name": "sediment geochemistry",
            "scope": "the study of the chemical composition and cycling of sedimentary systems."
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/5d3f4014e4b01d82ce8d92ad?name=SanFranciscoNorthBayWildfireStreamNearshoreSedimentGeochemistry2018_SampleMap.jpg&allowOpen=true",
            "description": "Map showing sample locations"
        }
    ],
    "fan": [
        "2018-623-FA",
        "2018-624-FA"
    ]
}