# Marinduque Island, Philippines Coral Heavy Metals and Oxygen Isotope Data
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#                World Data Service for Paleoclimatology, Boulder 
#                                  and 
#                     NOAA Paleoclimatology Program 
#             National Centers for Environmental Information (NCEI)
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# Template Version 4.0
# Encoding: UTF-8
# NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. 
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# Description/Documentation lines begin with #
# Data lines have no #
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# NOAA_Landing_Page:  https://www.ncei.noaa.gov/access/paleo-search/study/1893
#   Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata.
#
# Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-coral-1893.json
#   Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata.
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# Data_Type: Corals and Sclerosponges
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# Dataset_DOI: 10.25921/5844-dk90
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# Science_Keywords:
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# Resource_Links
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# Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/west_pacific/marinduque2004-cghao01-metals-noaa.txt
#   Data_Download_Description: NOAA Template File; Caganhao Reef Sample 2001 Heavy Metal Data
#
# Related_Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/west_pacific/marinduque2004-supp.txt
#   Related_Online_Description: Supplemental File; Raw Density and Oxygen Isotope Data Used for Chronology
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# Contribution_Date
#   Date: 2003-07-01
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# File_Last_Modified_Date
#   Date: 2025-07-15
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# Title
#   Study_Name: Marinduque Island, Philippines Coral Heavy Metals and Oxygen Isotope Data
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# Investigators
#   Investigators: David, C.P.
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# Description_Notes_and_Keywords
#   Description: Marinduque Island, Philippines Coral Heavy Metals and Oxygen Isotope Data. All samples are from the Island of Marinduque in the Philippines (13deg 26'N  121deg 49' E).
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# Publication 
#   Authors: David, C.P.
#   Published_Date_or_Year: 2003
#   Published_Title: Heavy metal concentrations in growth bands of corals: a record of mine tailings input through time (Marinduque Island, Philippines)
#   Journal_Name: Marine Pollution Bulletin
#   Volume: 46
#   Edition: 
#   Issue: 2
#   Pages: 187-196
#   Report_Number: 
#   DOI: 10.1016/S0025-326X(02)00315-6
#   Online_Resource: 
#   Full_Citation:
#   Abstract: The impact of copper mining along the western coast of Marinduque Island was investigated. Historic input of mine tailings in the coastal region was traced through variations in heavy metal concentrations in Porites growth bands. Five samples were collected from three reefs showing different modes and extent of exposure to mine tailings. Baseline metal concentrations in Porites were established using a coral from a reef that is least exposed to contamination. The lowest mean values of Cu (0.7 μg/g), Mn (0.8 μg/g), and Zn (1.0 μg/g) were calculated from annual skeletal bands representing five years of growth. Conversely, a sample from a reef adjacent to an old tailings stockpile displayed consistently elevated metal values in its growth bands. Mean Cu, Mn, and Zn values for this coral are 3.1, 1.0 and 1.8 μg/g, respectively. Corals from the Ihatub reef showed a distinct metal concentration peak in their 1996 growth ring. These peaks coincide with a documented release of mine tailings in the Ihatub area during that year. Other metal peaks observed in coral samples correlate with years of high precipitation which may have resulted in increased sediment transport in the region. The metals are presumed to be mostly bound to the aragonite lattice of the coral skeleton, however, contribution from incorporated detrital materials to the observed metal signal (mainly of Fe) could not be easily discounted.
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# Funding_Agency 
#   Funding_Agency_Name: Geological Society of America
#   Grant: student grant
#--------------------
# Funding_Agency 
#   Funding_Agency_Name: Stanford University
#   Grant: McGee grant
#--------------------
# Funding_Agency 
#   Funding_Agency_Name: Department of Science and Technology of the Philippine Government
#   Grant: 
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# Site_Information 
#   Site_Name: Marinduque Island
#   Location: Philippines
#   Northernmost_Latitude: 13.43
#   Southernmost_Latitude: 13.43
#   Easternmost_Longitude: 121.82
#   Westernmost_Longitude: 121.82
#   Elevation_m: 
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# Data_Collection  
#   Collection_Name: david2003 cghao01 metals
#   First_Year: 1995
#   Last_Year: 2000
#   Time_Unit: CE
#   Core_Length_m: 
#   Parameter_Keywords: trace metals
#   Notes:
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# Chronology_Information
#   Chronology: 
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# Variables  
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# PaST_Thesaurus_Download_Resource:  https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf
#   PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format.
#
# Data variables follow that are preceded by "##" in columns one and two.
# Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data)
#
## samp_id	sample identification,,,,,corals and sclerosponges,,,C,
## depth_mm	depth,,,millimeter,,corals and sclerosponges,,,N,
## cu	copper,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,
## cu_stdev	copper,Porites lobata,one standard deviation,microgram per gram,,corals and sclerosponges,,,N,
## fe	iron,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,
## fe_stdev	iron,Porites lobata,one standard deviation,microgram per gram,,corals and sclerosponges,,,N,
## mn	manganese,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,
## mn_stdev	manganese,Porites lobata,one standard deviation,microgram per gram,,corals and sclerosponges,,,N,
## zn	zinc,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,
## zn_stdev	zinc,Porites lobata,one standard deviation,microgram per gram,,corals and sclerosponges,,,N,
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# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing_Values:
samp_id	depth_mm	cu	cu_stdev	fe	fe_stdev	mn	mn_stdev	zn	zn_stdev
cghao-1	2	1.597845601		3.846499102		1.016606822		1.247755835	
cghao-2_1	3.75	0.927203511	0.352213747	92.9772133		1.138260665	0.5632709	0.990107248	0.087591668
cghao3	5.5	0.530033273		6.269336291		0.712159243		0.621096258	
cghao4_1	7	0.530846087	0.118652835	0.146554912	0.626067788	0.743957083	0.005659481	0.575905483	0.012668137
cghao5_1	8.5	0.512861911	0.001110145	3.379385723	3.66652246	1.152496154	0.020158537	0.740795675	0.13450825
cghao6_1	10	0.541890626	0.100815505			0.846545181	0.010543973	1.101482205	0.093931616
cghao7_1	11.5	0.69237408	0.145058433	0.03150404	0.319446451	0.580556418	0.002272075	1.51775185	0.001144371
cghao8_1	13	0.826390107	0.058396972			0.718488434	0.029868891	1.045172159	0.088398589
cghao9_1	14.5	0.659608012	0.018563347	0.737969597	0.48273885	0.923505667	0.011401992	0.557866315	0.035533625
cghao10_1	16	1.180974478		0.764083852	0.177911507	0.678453194	0.007919551	1.25	
cghao11_1	17.5	1.520634705	0.148736491	0.341647669	0.084041178	0.631442428	0.00344601	0.664634582	0.051389758
cghao12_1	19	1.403435723	0.490055401	2.504288979	2.25264338	0.677789751	0.009064872	0.619293731	0.185904088
cghao13_1	20	1.201682712	0.272199838	0.497594524	0.179369882	1.049766047	0.011348796	0.59716472	0.194209717
cghao14_1	21.5	1.011655255	0.025244914	0.759618182	0.266413012	0.803875623	0.00042849	1.088347128	0.107240068
cghao15_1	23	0.664271112	0.103865445	0.592417177	0.000645521	0.456421699	0.007794935	1.003660847	0.018870388
cghao16_1	24.5	0.665861429	0.089456442	0.91376991	0.041644103	0.539960698	0.006370985	1.341790549	0.078711795
cghao17_1	26	0.977144942	0.11886558	1.41188887	0.896309289	0.505944592	0.00260429	1.177733535	0.040074614
cghao18_1	27.5	0.339300888		1.37590603	1.155081791	0.467693675	0.002199764	0.80754466	0.186164417
cghao19_1	29	1.047886194	0.601976318	0.3969721	0.174546191	0.50105554	0.004902297	1.083878972	0.250676481
cghao20_1	30.5	0.356151902	0.031618419	3.329712334	2.922797274	1.29635431	0.020688081	0.735615887	0.04910275
cghao21_1	32	0.752703892	0.099081015	0.357329537	0.015467571	1.654018256	0.015660913	1.159521836	0.022132027
cghao22_1	33.5	1.027158774		0.770296134	0.059989727	1.204067154	0.034150719	1.513664484	0.113943036
cghao23_1	35.4	0.495683865	0.097741255	1.172859005	0.701824895	0.533909853	0.003319706	0.977458795	0.040804762
cghao24_1	37.3	0.512553096	0.003562234	0.034720289	0.104810025	0.538229302	0.007621067	1.390480306	0.020544554
cghao25_1	39.2	0.423088888	0.015895959			0.489370084	0.010477523	1.036918797	0.107933731
cghao26_1	41.1	0.524785532	0.026573984	6.01273828	5.757828915	0.566776422	0.036187298	0.599873778	0.032679092
cghao27_1	43	0.73325558	0.07884879	0.259491108	0.163544248	0.584248856	0.003733185	0.471607402	0.065678378
cghao28_1	44.9	0.55777266	0.026713983	2.050625665	0.106628239	0.727384628	0.086261976	0.498689968	0.003402082
cghao29_1	46.8	0.854872509	0.18133591	0.36396229	0.111975243	0.763758625	0.026637636	0.86249117	0.025351044
cghao30_1	48.7	0.416226544	0.022356008	2.964417625	2.099965059	1.852943944	0.044402314	0.677573151	0.034328963
cghao31_1	50.6	0.352625302	0.036271415	0.304053066	0.368869186	0.98807845	0.009526171	2.23360794	0.15049802
cghao32_1	52.5	0.356992871	0.023138908	0.440262554	0.025375869	0.797255425	0.002236961	1.58397967	0.009148014
cghao33_1	54.4	0.294099919	0.018851137	4.139220575		0.88349218	0.023869059	1.147948047	0.067381193
cghao34_1	56	1.233481254	0.19406176	2.782898608		1.286647058	0.00380205	1.725953682	0.453155094