Online link | https://geo-nsdi.er.usgs.gov/metadata/open-file/01-443/Sierra_de_las_Minas/ls23614.faq.html |
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Description | This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
Originators | Bucknam, Robert C.; Coe, Jeffrey A.; Mota, Manuel Antonio; Godt, Jonathan W.; Tarr, Arthur C.; Bradley, Lee-Ann; Rafferty, Sharon A.; Hancock, Dean; Dart, Richard L.; and Johnson, Margo L. |
Publication | U.S. Geological Survey Open-File Report 01-443 |
The columns and their definitions are listed below. All values that were less than (<) were converted to minus (-). Samples were processed by several methods. As a result, there was duplication of analyses for some elements. Rock samples were air dried followed by disaggregation in a mechanical jaw crusher. A split was ground to <100 mesh (0.15 mm) in a ceramic plate grinder. A riffle splitter was used to obtain splits to ensure similarity with the whole sample. One set of splits for all samples was archived, and approximately 50-g splits of ground material was shipped to the contract laboratory for analysis. Forty major, minor, and trace elements were determined for all 31 samples by inductively coupled plasma-atomic emission spectrometry (ICP-AES), also referred to as the ICP-40 package, after low-temperature (<150oC) digestion using concentrated hydrochloric, hydrofluoric, nitric, and perchloric acids (Crock and others, 1983). Splits of all samples were also submitted to a contract laboratory for analysis of 16 major, minor, and trace elements (Al, Ba, Ca, Cr, Fe, Mg, Mn, Nb, P, K, Si, Na, Sr, Ti, Y, Zr) by ICP-AES using a lithium metaborate fusion. This technique, also referred to as the ICP-16 package, was used especially to provide analysis of silicon (Si) for these siliceous, phosphatic shale samples. The samples were fused with lithium metaborate in a graphite crucible. In-house standards, and synthetic standards were used to calibrate the instrument. Sample solutions were aspirated into the ICP through a high-solids nebulizer, and metal concentrations were measured simultaneously. Selenium, arsenic, and antimony analyses were accomplished using hydride generation followed by atomic absorption (AA) spectroscopy. Tellurium and thallium were determined using AA graphite furnace spectroscopy. Total sulfur and the various forms of carbon were determined using a LECO furnace followed by gas chromatographic measurement. Eight samples were also submitted for a 10- element ICP-AES technique, also referred to as ICP-10, for determination of Ag, As, Au, Bi, Cd, Cu, Mo, Pb, Sb, and Zn. Hydrochloric acidhydrogen peroxide were used to solubilize metals not tightly bound in the silicate lattice of rocks, and metals are extracted as organic halides. Concentrations of the extracted metals were determined simultaneously after aspiration into a multichannel ICP instrument. This procedure is a partial digestion and results may be biased low when compared to procedures involving complete dissolution of the sample. >SEQ_NO Unique sequence number >LAB_NO Laboratory number >SAMPLE_NO Field sample number >DATE_COLL Date sample collected >SAMP_TYPE Type of sample taken >FEAT_SAMP Mine feature sampled >LITHOLOGY Rock type sampled >SITE_NAME Name of mine or property where sample collected >QUAD_MAP U.S. Geological Survey 7.5' Topographic map upon which site is located >COUNTY County >STATE State >LONGITUDE Longitude of sample taken with GPS >LATITUDE Latitude of sample taken with GPS >MERIDIAN Meridian >TWSP Township >RANGE Range >SECTION Section >PARCEL Fractional part of section >As_Hyd_ppm Arsenic in parts per million analyzed by hydride generation-atomic absorption spectrometry >Hg_CVA_ppm Mercury in parts per million analyzed by cold vapor atomic absorption >Se_Hyd_ppm Selenium in parts per million analyzed by hydride generation-atomic absorption spectrometry >Sb_Hyd_ppm Antimony in parts per million analyzed by hydride generation-atomic absorption spectrometry >Te_Hyd_ppm Tellurium in parts per million analyzed by hydride generation-atomic absorption spectrometry >Tl_Hyd_ppm Thallium in parts per million analyzed by hydride generation-atomic absorption spectrometry >C_Tot_pct Carbon in percent analyzed by combustion in an oxygen atmosphere followed by infrared measurement of evolved CO2 >CO2_Ac_pct Carbon dioxide in percent evolved after acidification >C_Crbt_pct Carbonate (inorganic) carbon in percent analyzed by coulometric titration after acidification >S_Tot_pct Sulfur in percent analyzed by combustion in an oxygen atmosphere followed by infrared measurement of evolved SO2 >Ag_10_ppm Silver in parts per million analyzed by 10 element method >As_10_ppm Arsenic in parts per million analyzed by 10 element method >Au_10_ppm Gold in parts per million analyzed by 10 element method >Bi_10_ppm Bismuth in parts per million analyzed by 10 element method >Cd_10_ppm Cadmium in parts per million analyzed by 10 element method >Cu_10_ppm Copper in parts per million analyzed by 10 element method >Mo_10_ppm Molybdenum in parts per million analyzed by 10 element method >Pb_10_ppm Lead in parts per million analyzed by 10 element method >Sb_10_ppm Antimony in parts per million analyzed by 10 element method >Zn_10_ppm Zinc in parts per million analyzed by 10 element method >Al_16_pct Aluminum in percent analyzed by 16 element method >Ca_16_pct Calcium in percent analyzed by 16 element method >Fe_16_pct Iron in percent analyzed by 16 element method >K_16_pct Potassium in percent analyzed by 16 element method >Mg_16_pct Magnesium in percent analyzed by 16 element method >Na_16_pct Sodium in percent analyzed by 16 element method >P_16_pct Phosphorous in percent analyzed by 16 element method >Si_16_pct Silicon in percent analyzed by 16 element method >Ti_16_pct Titanium in percent analyzed by 16 element method >Ba_16_ppm Barium in parts per million analyzed by 16 element method >Cr_16_ppm Chromium in parts per million analyzed by 16 element method >Mn_16_ppm Manganese in parts per million analyzed by 16 element method >Nb_16_ppm Niobium in parts per million analyzed by 16 element method >Sr_16_ppm Strontium in parts per million analyzed by 16 element method >Y_16_ppm Yittrium in parts per million analyzed by 16 element method >Zr_16_ppm Zirconium in parts per million analyzed by 16 element method >Al_40_pct Aluminum in percent analyzed by 40 element method >Ca_40_PCT Calcium in percent analyzed by 40 element method >Fe_40_pct Iron in percent analyzed by 40 element method >K_40_pct Potassium in percent analyzed by 40 element method >Mg_40_pct Magnesium in percent analyzed by 40 element method >Na_40_pct Sodium in percent analyzed by 40 element method >P_40_pct Phosphorous in percent analyzed by 40 element method >Ti_40_pct Titanium in percent analyzed by 40 element method >Ag_40_ppm Silver in parts per million analyzed by 40 element method >As_40_ppm Arsenic in parts per million analyzed by 40 element method >Au_40_ppm Gold in parts per million analyzed by 40 element method >Ba_40_ppm Barium in parts per million analyzed by 40 element method >Be_40_ppm Beryllium in parts per million analyzed by 40 element method >Bi_40_ppm Bismuth in parts per million analyzed by 40 element method >Cd_40_ppm Cadmium in parts per million analyzed by 40 element method >Ce_40_ppm Cerium in parts per million analyzed by 40 element method >Co_40_ppm Cobalt in parts per million analyzed by 40 element method >Cr_40_ppm Chromium in parts per million analyzed by 40 element method >Cu_40_ppm Copper in parts per million analyzed by 40 element method >Eu_40_ppm Europium in parts per million analyzed by 40 element method >Ga_40_ppm Gallium in parts per million analyzed by 40 element method >Ho_40_ppm Holmium in parts per million analyzed by 40 element method >La_40_ppm Lanthanium in parts per million analyzed by 40 element method >Li_40_ppm Lithium in parts per million analyzed by 40 element method >Mn_40_ppm Manganese in parts per million analyzed by 40 element method >Mo_40_ppm Molybdenum in parts per million analyzed by 40 element method >Nb_40_ppm Niobium in parts per million analyzed by 40 element method >Nd_40_ppm Neodymium in parts per million analyzed by 40 element method >Ni_40_ppm Nickel in parts per million analyzed by 40 element method >Pb_40_ppm Lead in parts per million analyzed by 40 element method >Sc_40_ppm Scandium in parts per million analyzed by 40 element method >Sn_40_ppm Tin in parts per million analyzed by 40 element method >Sr_40_ppm Strontium in parts per million analyzed by 40 element method >Ta_40_ppm Tantalum in parts per million analyzed by 40 element method >Th_40_ppm Thorium in parts per million analyzed by 40 element method >U_40_ppm Uranium in parts per million analyzed by 40 element method >V_40_ppm Vanadium in parts per million analyzed by 40 element method >Y_40_ppm Yittrium in parts per million analyzed by 40 element method >Yb_40_ppm Ytterbium in parts per million analyzed by 40 element method >Zn_40_ppm Zirconium in parts per million analyzed by 40 element method
http://pubs.usgs.gov/of/2001/0411/pdf/OF01-411.pdf